Technical Field of the invention
[0001] The present invention relates to HVAC (heating, ventilation and air conditioning)
systems, and more particularly to systems and methods for controlling supply airflow
temperature.
Background of the invention
[0002] Various types of facilities, such as office and/or residential buildings, industrial
production facilities, medical buildings, manufacturing assemblies and laboratories,
often use air handling units or HVAC systems to control indoor temperature. HVAC systems
generally utilize outside air temperature-affecting devices and the like to supply
air at designated temperatures to different areas, zones or rooms.
[0003] HVAC systems may e.g. be classified as either central or local. Central HVAC systems
may be used in cold climates to heat facilities, such as the facilities disclosed
above. Such a system may comprise a boiler, furnace, or heat pump to heat water, steam,
or air, all in a central location such as a furnace room in a home or a maintenance
room in a large building. The system may also comprise either ductwork, for forced
air systems, or piping to distribute a heated fluid, and radiators to transfer this
heat to the air. Central HVAC systems may also comprise various cooling means to be
used in warm climates to cool facilities, such as the facilities disclosed above.
HVAC systems thus generally comprise one or more temperature affecting devices.
[0004] However, a problem arises when the system comprises several such temperature affecting
devices, since it may be difficult to simultaneously control several temperature affecting
devices. A particular problem may be to control several temperature affecting devices
in terms of comfort, energy, or wear-and-tear point-of-views.
[0005] For example, one problem may be that a control signal to one or more of the temperature
affecting devices may oscillate in an undesired fashion.
[0006] For example, the envelope of the oscillations may be large and/or the frequency of
the oscillations may be high. There is thus a need for improved controlling of HVAC
systems comprising one or more temperature affecting devices.
[0007] US patent 5,350,113 discloses a dual-duct HVAC system for providing a desired comfort level in a room,
wherein the system includes a controller that carries out a simple operation that
determines the total open damper positions for dual dampers in a dual-duct system
to effect a desired air flow. However there is still a problem with controlling the
temperature of the cold decks and hot decks, which provide the dual-duct system with
cold and hot air, respectively.
[0008] A system for controlling supply airflow temperature is known from
JP01070633A.
Summary of the invention
[0009] In view of the above, an objective of the invention is to solve or at least reduce
the problems discussed above.
[0010] In light of the present invention it has been discovered that sequential control
systems, comprising e.g. a controller arranged to control a heat exchanger, a cooler
and a heater arranged along an airflow line, may be difficult to control in terms
of undesired oscillating control signals.
[0011] If the controller is a PI (proportional, integrate) controller or a PID (proportional,
integrate, derivate) controller, a common solution to mitigate the problem of undesired
oscillating control signals, wherein the envelope of the oscillations may be large
and/or the frequency of the oscillations may be high, has been to calculate new values
for the P-gain and the I-time. Particularly, a common solution has been to increase
the values of the P-gain and I-time, respectively. However, in light of the present
invention it has been realized that the problem may remain even if new values for
the P-gain and I-time are calculated. In light of the present invention it has further
been realized that the problem may be associated with utilising only one sensor.
[0012] It is thus an object of the present invention to provide improved control of the
airflow temperature in a sequential control system, wherein e.g. a heat exchanger,
a cooler and a heater are utilized in sequence.
[0013] It is a further object of the present invention to provide improved control of the
airflow temperature from comfort or energy point-of-views. It is a further object
to minimize, or at least to mitigate, the wear of driving devices, actuators, valve
bodies, gears, dampers, other mechanical and electrical components in the air flow
control system, and the like.
[0014] Generally, the above objectives are achieved by the attached independent patent claims.
[0015] According to a first aspect, the present invention is realized by a system for controlling
supply airflow temperature.
[0016] There is thus disclosed a system for controlling supply airflow temperature
in a building, wherein the supply airflow flows from an upstream position to a downstream
position along a supply airflow line. The supply airflow line comprising a first temperature-affecting
device, a second temperature-affecting device arranged in series with the first temperature-affecting
device, a first sensor positioned at a first position downstream the first temperature-affecting
device, and a second sensor positioned at a second position downstream the second
temperature-affecting device and upstream the first temperature affecting device,
The system further comprises a common controller configured to receive a first actual
value from the first sensor, a second actual value from the second sensor, and a set-point
value from a receiver. The common controller is configured to control the first temperature-affecting
device based on the first actual value and the set-point value and thereby control
the supply airflow temperatures at the first position, and the common controller is
configured to control the second temperature-affecting device based on the second
actual value and the set-point value and thereby control the supply airflow temperatures
at the second position.
[0017] The disclosed system may thus enable control of the first and/or second temperature-affecting
device based on input information, such as the set-point value, and one or more feedback
values such as the first and/or second actual values, respectively.
[0018] The present invention may thus enable improved control of each device associated
with control of the supply airflow line, such as heating coils, cooling coils, heat
recovery devices as thermal wheels, plate heat exchangers, liquid coupled coils, heat
pipes, and the like. The disclosed system may enable improved control of recirculation
of air. Advantages of the present invention may include, but are not be limited to,
better indoor climate, less wearing of control devices, such as control valves, dampers
and actuators, as hunting will be mitigated.
[0019] As a consequence of the improved control the present invention may also allow for
saving energy.
[0020] It may thus be possible to tune every control device separately as a new sensor is
located after each device along the supply airflow line. Every device may be controlled
based on its own sensor, directly located after each device along the supply airflow
line. Each of these sensors may receive a set-point value from the main controller
to which the first (main) sensor is connected.
[0021] In case the first temperature-affecting device is a heater, the second temperature-affecting
device may be a cooler. In case the first temperature-affecting device is a cooler,
the second temperature-affecting device may be a heater. The heater may comprise a
heating coil. The cooler may comprise a cooling coil.
[0022] The first actual value and the second actual value may pertain to the temperature
of the supply airflow at the first position and the second position, respectively.
[0023] The controller may comprise a first sub-controller and a second sub-controller, the
first temperature-affecting device and the second temperature-affecting device may
be controlled by a first and a second control signal, respectively. The first control
signal may be associated with the first sub-controller and the second control signal
may be associated with the second sub-controller.
[0024] The first control signal may control a first control valve associated with the first
temperature-affecting device. The second control signal may control a second control
valve associated with the second temperature-affecting device.
[0025] In case the first control valve is under operation the second control valve may either
be fully closed or fully opened. In case the second control valve is under operation
the first control valve may either be fully closed or fully opened.
[0026] The supply airflow line may further comprise a third sensor positioned at a third
position upstream the second temperature-affecting device, and a third temperature-affecting
device positioned upstream the third sensor, wherein the controller may be configured
to receive a third actual value from the third sensor, and the controller may be configured
to control the third temperature-affecting device based on the third actual value
and the set-point value and thereby control the supply airflow temperature at the
third position.
[0027] The third temperature-affecting device may be a heat exchanger.
[0028] The third actual value may pertain to the temperature of the supply airflow at the
third position.
[0029] The first and the second temperature-affecting devices may receive a second desired
value during the control of the first and the second temperature-affecting devices,
respectively. The second desired value may be associated with a control error pertaining
to the third actual value and a desired value at the third position.
[0030] The first temperature-affecting device may comprise a first body of water. The second
temperature-affecting device may comprise a second body of water. The airflow temperature
at the first position may be affected by the first body of water. The airflow temperature
at the second position may be affected by the second body of water.
[0031] According to a second aspect, the present invention is realized by a method for controlling
supply airflow temperature. There is thus disclosed a method for controlling supply
airflow temperature comprising receiving a first actual value from a first sensor,
wherein the first sensor is located at a first position along a supply airflow line,
receiving a set-point value from a receiver, receiving a second actual value from
a second sensor, wherein the second sensor is located at a second position along the
supply airflow line, controlling a first temperature-affecting device based on the
first actual value and the set-point value and thereby control the supply airflow
temperature at the first position, wherein the first temperature-affecting device
is positioned upstream the first sensor and downstream the second sensor, and controlling
a second temperature-affecting device based on the second actual value and the set-point
value and thereby control the supply airflow temperature at the second position, wherein
the second temperature-affecting device is positioned upstream the second sensor.
[0032] The first temperature-affecting devices may be controlled by a first control signal
controlling a first control valve. The second temperature-affecting devices may be
controlled by a second control signal controlling a second control valve. In case
the first controls valve is under operation the second control valve may either be
fully closed or fully opened. In case the second controls valve is under operation
the first control valve may either be fully closed or fully opened.
[0033] The method may further comprise receiving a third actual value from a third sensor,
wherein the third sensor may be located at a third position upstream the second temperature-affecting
device along the supply airflow line, and controlling a third temperature-affecting
device based on the third actual value and the set-point value and thereby control
the supply airflow temperature at the third position. The third temperature-affecting
device may be positioned upstream the third sensor.
[0034] The third temperature-affecting devices may be controlled by a third control signal
controlling a third control valve. In a case the first controls valve is under operation
the second control valve and the third control valve may independently be either fully
closed or fully opened. In case the second controls valve is under operation the first
control valve and the third control valve may independently be either fully closed
or fully opened. In case the third controls valve is under operation the first control
valve and the second control valve may independently be either fully closed or fully
opened.
[0035] According to a third aspect, the present invention is realized by a computer program
stored on a computer readable medium for controlling supply airflow temperature. There
is thus provided a computer program stored on a computer readable medium, which comprises
software instructions that, when executed in a computer, performs a method for controlling
supply airflow temperature according to the above. Such a computer program enables
for efficient implementation of the method for controlling supply airflow temperature.
[0036] According to a fourth aspect the present invention is realized by a controller for
controlling supply airflow temperature. There is thus provided a controller for controlling
supply airflow temperature, said controller comprising a receiver for receiving a
first actual value from a first sensor, wherein the first sensor is located at a first
position along a supply airflow line, a receiver for receiving a set-point value from
a receiver, a receiver for receiving a second actual value from a second sensor, wherein
the second sensor is located at a second position along the supply airflow line, a
first processor for controlling a first temperature-affecting device based on the
first actual value and the set-point value and thereby control the supply airflow
temperature at the first position, wherein the first temperature-affecting device
is positioned upstream the first sensor and downstream the second sensor, and a second
processor for controlling a second temperature-affecting device based on the second
actual value and the set-point value and thereby control the supply airflow temperature
at the second position, wherein the second temperature-affecting device is positioned
upstream the second sensor. Functionalities of the first processor and the second
processor may be performed by the same processor. Alternatively, some of the functionalities
may be performed by separate processors.
[0037] The second, third and fourth aspects may generally have the same features and advantages
as the first aspect.
[0038] Other objectives, features and advantages of the present invention will appear from
the following detailed disclosure, from the attached claims as well as from the drawings.
Brief Description of the Drawings
[0039] Other features and advantages of the present invention will become apparent from
the following detailed description of a presently preferred embodiment, with reference
to the accompanying drawings, in which
Fig. 1a is a block diagram of a prior art system;
Fig. 1b-d are block diagrams of systems for controlling supply airflow temperature
according to embodiments;
Fig. 1e is a block diagram of a controller according to an embodiment;
Fig. 2 is a flowchart of a method for controlling supply airflow temperature according
to an embodiment; and
Fig. 3 is a flowchart of a method for controlling supply airflow temperature according
to an embodiment.
Detailed Description
[0040] The present invention will now be described more fully hereinafter with reference
to the accompanying drawings, in which certain embodiments of the invention are shown.
This invention may, however, be embodied in many different forms and should not be
construed as limited to the embodiments set forth herein, rather, these embodiments
are provided by way of example so that this disclosure will be thorough and complete,
and will fully convey the scope of the invention to those skilled in the art. Like
numbers refer to like elements throughout.
[0041] Fig. 1 a illustrates a block diagram of a system 100 for controlling supply airflow
temperature according to prior art. The system comprises a cooler 103 and a heater
105. The heater 105 is arranged in series with the cooler 103 along a supply airflow
line 102.
[0042] The supply airflow flows from an upstream position to a downstream position along
the supply airflow line 102. In the illustrative example of Fig. 1a the airflow direction
is indicated by the arrow comprised in the airflow line 102. That is, the arrow comprised
in the airflow line 102 points in the downstream direction. The supply airflow line
102 may
inter alia be an air duct, which may be part of a ductwork. Air ducts as such may be utilized
for ensuring acceptable indoor air quality and/or thermal comfort. The supply airflow
line 102 may
inter alia be made of galvanised steel, polyurethane duct board (pre-insulated aluminium ducts),
fibre glass duct board (pre-insulated non-metallic ductwork), flexible tubing and
the like.
[0043] The system 100 further comprises a sensor 109. The sensor 109 is positioned at a
position downstream the cooler 103. The sensor 109 may thus be a temperature sensor
arranged to measure the temperature of the supply airflow at the position along the
supply airflow line 102.
[0044] The system further comprises a controller 115 arranged to control the cooler 103
and the heater 105 based on a set-point value received from a receiver 142 and an
actual value from the sensor 109. The controller 115 may be a PI (proportional, integrate)
controller. Alternatively the controller 115 may be a PID (proportional, integrate,
derivate) controller.
[0046] In particular, a common solution to mitigate the problem of undesired oscillating
control signals, wherein the envelope of the oscillations may be large and/or the
frequency of the oscillations may be high, has been to calculate new values for the
P-gain and the I-time, Particularly, a common solution has been to increase the values
of the P-gain and I-time, respectively.
[0047] However, in light of the present invention it has been realized that the problem
may remain even if new values for the P-gain and I-time are calculated. In light of
the present invention it has further been realized that the problem may be associated
with utilising only one sensor.
[0048] Fig. 1b illustrates a block diagram of a system 101 for controlling supply airflow
temperature according to an embodiment. The system 101 according to the present invention
comprises a first temperature-affecting device 104 and a second temperature-affecting
device 106. The second temperature-affecting device 106 is arranged in series with
the first temperature-affecting device 104 along the supply airflow line 102. As in
Fig. 1a the supply airflow flows from an upstream position to a downstream position
along the supply airflow line 102.
[0049] The system 101 further comprises a first sensor 110. The first sensor 110 is positioned
at a position downstream the first temperature-affecting device 104. The first sensor
110 may thus be a temperature sensor arranged to measure the temperature of the supply
airflow at the position, wherein the position is a position along the supply airflow
line 102.
[0050] The system further comprises a controller 116 arranged to control the first temperature-affecting
device 104 and the second temperature-affecting device 106 based on a set-point value
received from a receiver 142 and an actual value from the first sensor 110. The controller
116 may be a PI controller. Alternatively the controller 116 may be a PID controller.
[0051] The system further comprises a second sensor 112. The second sensor 112 is positioned
at a second position downstream the second temperature-affecting device 106. The second
sensor 112 is further positioned upstream the first temperature-affecting device 104.
The second sensor 112 may thus be a temperature sensor arranged to measure the temperature
of the supply airflow at the second position, wherein the second position is a position
along the supply airflow line 102.
[0052] The controller 116 is configured to receive a first actual value from the first sensor
110. The first actual value may pertain to the temperature of the supply airflow at
the first position. Thus in a state of operation the controller 116 is operatively
connected to the first sensor 110 via connection means 118. The controller 116 is
further configured to receive a second actual value from the second sensor 112. The
second actual value may pertain to the temperature of the supply airflow at the second
position. Thus, in a state of operation, the controller 116 is operatively connected
to the second sensor 112 via connection means 120. The connection means, 118, 120
may be any conventional connection means, such as a wired or a wireless connection,
or any combination thereof. The values of the first sensor 110 and/or the second sensor
112 may be stored at one or more intermediate storage facilities, such as a database
(not shown). Thus such a intermediate storage facility enables further analysis of
the measured signals. Alternatively the one or more storage facility may be comprised
in the first sensor 110 and/or the second sensor 112. Alternatively the one or more
storage facility may be comprised in the controller 116.
[0053] The controller 116 is further configured to receive a set-point value from a receiver
142. The set-point value may thus define a desired value. The desired value may pertain
to a desired temperature value. The desired value may pertain to a temperature value
of an enclosed space, such as a room in a building, wherein the enclosed space is
further associated with a destination of the supply airflow line 102. The destination
may be a termination point of the supply airflow line 102. Thus, by actuating the
set-point value, a desired temperature of e.g. a room in a building may be changed.
The set-point value may be actuated by an operator, such as a service person, a maintenance
person, or other personnel. Alternatively the set-point value may be actuated by an
operator device (not shown). The operator device may thus be arranged to provide the
controller 116 with instructions pertaining to a desired temperature of the enclosed
space.
[0054] The controller 116 is thus further configured to control the first temperature-affecting
device 104 based on the first actual value and the set-point value and thereby control
the supply airflow temperatures at the first position. The controller 116 is thus
further configured to control the second temperature-affecting device 106 based on
the second actual value and the set-point value and thereby control the supply airflow
temperatures at the second position.
[0055] Alternatively the controller 116 may be configured to control the first temperature-affecting
device 104 based on the first actual value, the second actual value and the set-point
value. Similarly, the controller 116 may be configured to control the second temperature-affecting
device 106 based on the first actual value, the second actual value and the set-point
value.
[0056] The disclosed system 101 may thus enable control of a first and/or second temperature-affecting
device 104, 106 based on input information, such as the set-point value, and one or
more feedback values such as the first and/or second actual values, respectively.
[0057] In a case the first temperature-affecting device 104 is a heater the second temperature-affecting
device 106 may be a cooler. The heater may comprise a heating coil. The cooler may
comprise a cooling coil. In a case the first temperature-affecting device 104 is a
cooler the second temperature-affecting device 106 may be a heater. Thus the first
temperature-affecting device 104 and the second temperature-affecting device 106 may
provide different means for affecting the airflow temperature. Hence by utilizing
two different temperature-affecting device 106 associated with different functionalities
the heater may be separated from the cooler. In addition the heater and the cooler
may be allowed to switch places in the control system. This may lead to better control
and higher flexibility.
[0058] The controller 116 may comprise a first sub-controller 136 and a second sub-controller
138. The first sub-controller 136 and a second sub-controller 138 may be controlled
by a master controller.
[0059] Further, the first temperature-affecting device 104 may be controlled by a first
control signal. The second temperature-affecting device 106 may be controlled by a
second control signal. Thus, in a state of operation, the controller 116 may be operatively
connected to the first temperature-affecting device 104 via connection means 130.
The first control signal may thus be communicated from the controller 116 to the first
temperature-affecting device 104 via the connection means 130. In a state of operation
the controller 116 may be operatively connected to the second temperature-affecting
device 106 via connection means 132. The second control signal may thus be communicated
from the controller 116 to the second temperature-affecting device 106 via the connection
means 132. The first control signal may further be associated with the first sub-controller
136. The second control signal may be associated with the second sub-controller 138.
Hence the controller 116 may comprise separate sub-controllers 136,138 for controlling
the temperature-affecting devices 104, 106.
[0060] The first control signal may further control a first control valve 124. The first
control valve 124 may be associated with the first temperature-affecting device 104.
The second control signal may further control a second control valve 126. The second
control valve 126 may be associated with the second temperature-affecting device 106.
[0061] Thus the controller 116 and/or the sub-controllers 136, 138 may thus be arranged
to control the first and second control valves 124, 126 respectively, thereby controlling
the temperature-affecting devices 104, 106.
[0062] In a case the first control valve 124 is under operation the second control valve
126 may be either fully closed or fully opened. In a case the second controls valve
126 is under operation, the first control valve 124 may be either fully closed or
fully opened.
[0063] For example, according to a first scenario the second control valve 126 is fully
closed and the first control valve 124 may thus be under operation. In a case the
first temperature-affecting device 104 is a cooler, the controller 116 of the system
101 is thus associated with cooling regulation of the system 101.
[0064] Thus such a system 101 enables improved control since it may enable separate and
individual control of the temperature-affecting devices 102, 104. Alternatively the
control of the first temperature-affecting device 102 may be affected by the control
of the first temperature-affecting device 104, and vice versa. Thus, such a system
101 enables improved control since it may enable combined control of the temperature-affecting
devices 102, 104. Thus, such a system 101 enables improved control since it may switch
between a first mode enabling separate and individual control and second mode enabling
combined control of the temperature-affecting devices 102, 104.
[0065] Fig. 1c illustrates a block diagram of a system 150 for controlling supply airflow
temperature. The system 150 is similar to the system 101 of Fig. 1b and may thus be
said to comprise all advantages and features of the system 101. In comparison to the
system 101 of Fig. 1b the system 150 of Fig. 1c further comprises a third sensor 114.
The third sensor 114 may be positioned at a third position upstream the second temperature-affecting
device 106. The third sensor 114 may comprise features and advantages of the first
and second sensors 110, 112, respectively. The system 150 further comprises a third
temperature-affecting device 108. The third temperature-affecting device 108 may be
positioned upstream the third sensor 114. The controller 116 may then be configured
to receive a third actual value from the third sensor 114.
[0066] The controller 116 may then further be configured to control the third temperature-affecting
device 108 based on the third actual value and the set-point value and thereby control
the supply airflow temperature at the third position.
[0067] The third actual value may pertain to the temperature of the supply airflow at the
third position The third sensor 114 may thus be arranged to measure the temperature
of the supply airflow at the third position, wherein the third position is a position
along the supply airflow line 102.
[0068] Thus in a state of operation the controller 116 may be operatively connected to the
third sensor 114 via connection means 122. The connection means 122 may be any conventional
connection means, such as a wired or a wireless connection, or any combination thereof.
The values of the third sensor 114 may be stored at one or more intermediate storage
facilities, such as a database (not shown). The third temperature-affecting device
108 may be a heat exchanger. Thus the system 150 may comprise a heater, a cooler and
a heat exchanger.
[0069] In addition the first and the second temperature-affecting devices 104 106 may, independently
of each other, receive a second desired value during the control of the first and
the second temperature-affecting devices 104, 106, respectively. The second desired
value may be associated with a control error pertaining to the third actual value
and a desired value at the third position. The desired value at the third position
may be a set-point value similar to the set-point value disclosed above with reference
to the system 101 of Fig. 1b. Thus, such a desired value further improves the control
of the temperature-affecting devices.
[0070] The first temperature-affecting device 104 may comprises a first body of water. Likewise,
the second temperature-affecting device 106 may comprise a second body of water. The
airflow temperature at the first position may thus be affected by the first body of
water. The airflow temperature at the second and position may thus be affected by
the second body of water.
[0071] For example, if the second temperature-affecting device 108 acts as a heater, the
second body of water may have a temperature which is higher than the temperature of
the supply airflow at the second position. By passing through the second body of water,
the supply airflow may thus be affected by the temperature of the second body of water.
By passing through is here meant that the supply airflow line, which may be embodied
as a pipeline or any other conventional means for realizing a supply airflow line,
passes through the second body of water.
[0072] The supply airflow line 102 may further comprise one or more outlets 182, 184 along
the supply airflow line 102. The one or more outlets 182, 184 may further be operatively
connected to other parts (not shown) of the supply airflow system 101, 150. Such parts
may include, but are not limited to, additional enclosed spaces such as rooms, one
or more additional supply airflow line, ductwork, and the like.
[0073] For example, some of the sensors 110, 112, 114, may be arranged to measure the airflow
temperature at the one or more outlets 182, 184. Thus the controller 116 may control
the airflow temperature at the one or more outlets 182, 184. Advantageously the controller
116 may control the individual airflow temperature at each one of the one or more
outlets 182, 184 independently. For example the individual airflow temperatures may
be controlled by utilizing one or more sub-controllers 136, 138, 140.
[0074] Fig. 1d illustrates a controller 185 comprising a first sub-controller 136, a second
sub-controller 138 and a third sub-controller 140. The first sub-controller 136 is
arranged to, in a state of operation, receive a set-point value from a receiver 142
and an auxiliary value via connecting means 188. The first sub-controller 136 is further
arranged to control a first auxiliary device via connecting means 186. The first sub-controller
136 may further be arranged to transmit feedback values to the second and/or third
sub-controller(s) 138, 140, respectively via connecting means 144 and 146, respectively.
The feedback values may pertain to a control error.
[0075] The second sub-controller 138 is arranged to, in a state of operation, receive a
feedback value from the first sub-controller 136 via connecting means 144 and to receive
an auxiliary value via connecting means 192. The second sub-controller 138 is further
arranged to control a second auxiliary device via connecting means 190.
[0076] The third sub-controller 140 is arranged to, in a state of operation, receive a feedback
value from the first sub-controller 136 via connecting means 146 and to receive an
auxiliary value via connecting means 196. The second sub-controller 140 is further
arranged to control a third auxiliary device via connecting means 194.
[0077] The second sub-controller 138 may be arranged to, in a state of operation, provide
a feedback value to the third sub-controller 140 via connecting means 198. Thus the
third sub-controller 140 may be arranged to, in a state of operation, receive a feedback
value from the second sub-controller.
[0078] Thus the controller 185 comprising the first sub-controller 136, the second sub-controller
138 and the third sub-controller 140 may control a first auxiliary device, a second
auxiliary device and a third auxiliary device, respectively. Depending on the feedback
signals from the first sub-controller 136 the second sub-controller 138 and the third
sub-controller 140 may control the second auxiliary device and the third auxiliary
device more or less independently.
[0079] Fig. 1e illustrates a block diagram of a system 160 for controlling supply airflow
temperature. The system 160 is similar to the system 101 of Fig. 1b and/or the system
150 of Fig. 1c and may thus be said to comprise all advantages and features of the
system 101 and/or the system 150.
[0080] The system 160 comprises a controller, similar to the controller 185 of Fig. 1d,
which controller comprises a first sub-controller 136, a second sub-controller 138
and a third sub-controller 140. In the illustrative example of Fig.1d the first sub-controller
136 is arranged to, in a state of operation, receiver a set-point value from a receiver
142 and an actual value from the first sensor 110 via the connecting means 118. The
first sub-controller 136 is further arranged to, in a state of operation, control
the first temperature-affecting device 104 via the connecting means 130.
[0081] The second sub-controller 138 is arranged to, in a state of operation, receive a
feedback value from the first sub-controller 136 and an actual value from the second
sensor 112 via the connecting means 120. The second sub-controller 138 is further
arranged to, in a state of operation, control the second temperature-affecting device
106 via the connecting means 132.
[0082] The third sub-controller 140 is arranged to, in a state of operation, receive a feedback
value from the first sub-controller 136 and an actual value from the third sensor
114 via the connecting means 122. The third sub-controller 140 is further arranged
to, in a state of operation, control the third temperature-affecting device 108 via
the connecting means 134.
[0083] Fig. 2 is a flowchart illustrating a method for controlling supply airflow temperature.
The method for controlling supply airflow temperature comprises receiving, in a step
202, a first actual value from a first sensor 110, wherein the first sensor 110 is
located at a first position along a supply airflow line 102.
[0084] The method further comprises receiving, in a step 202, a set-point value from a receiver
142.
[0085] A second actual value is received, in a step 204, from a second sensor 112, wherein
the second sensor 112 is located at a second position along the supply airflow line.
[0086] In a step 206 a first temperature-affecting device 104 may be controlled based on
the first actual value and the set-point value. Thereby the supply airflow temperature
at the first position may be controlled.
[0087] In a step 208 a second temperature-affecting device 106 may be controlled based on
the second actual value and the set-point value. Thereby the supply airflow temperature
at the second position may be controlled.
[0088] The first temperature-affecting device 104 may be positioned upstream the first sensor
110 and downstream the second sensor 112. The second temperature-affecting device
106 may be positioned upstream the second sensor 112.
[0089] The disclosed method may be embodied as any of the systems disclosed above with references
to Figs. 1b-1e, respectively,
mutatis mutandis.
[0090] Fig. 3 is a flowchart of a method for controlling supply airflow temperature according
to an embodiment.
[0091] In the flowchart of Fig. 3 step 302 is similar to step 202 of Fig. 2; step 304 is
similar to step 204; step 306 is similar to step 206; step 308 is similar to step
208; and step 310 is similar to step 210.
[0092] In case the first temperature-affecting devices 104 is controlled by a first control
signal controlling a first control valve 124, and the second temperature-affecting
devices106 is controlled by a second control signal controlling a second control valve
126, the method may further comprise a step 312 wherein it is investigated whether
the first control valve 124 or the second control valve 126 is under operation.
[0093] In case the first control valve 124 is under operation the second control valve 126
is in a step 314 set to be either fully closed or fully opened.
[0094] In case it is decided that the second control valve 126 is under operation the first
control valve 124 is in a step 316 set to be either fully closed or fully opened.
[0095] The method may further comprise receiving, in a step 318, a third actual value from
a third sensor 114, and, in a step 320, controlling a third temperature-affecting
device 108 based on the third actual value and the set-point value. Thereby the supply
airflow temperature may be controlled at a third position. The third sensor 114 may
located at the third position, which may be a position upstream the second temperature-affecting
device 106 along the supply airflow line The third temperature-affecting device 108
may be positioned upstream the third sensor 114.
[0096] The third temperature-affecting devices 108 may be controlled by a third control
signal controlling a third control valve 128. If it is decided, in a step 322, that
the first controls valve 124 is under operation the second control valve 126 and the
third control valve 128 are, in a step 324, independently set to be either fully closed
or fully opened.
[0097] Alternatively, if it is decided, in a step 326, that the second controls valve 126
is under operation, the first control valve wand the third control valve 128 are,
in a steep 328, independently set to be either fully closed or fully opened. In a
case the third controls valve 128 is under operation the first control valve 124 and
the second control valve 126 are, in a step 330, independently set to be either fully
closed or fully opened.
[0098] Generally, all terms used in the claims are to be interpreted according to their
ordinary meaning in the technical field, unless explicitly defined otherwise herein.
All references to "a/an/the [element, device, component, means, step, etc]" are to
be interpreted openly as referring to at least one instance of said element, device,
component, means, step, etc., unless explicitly stated otherwise. The steps of any
method disclosed herein do not have to be performed in the exact order disclosed,
unless explicitly stated.
1. A system (101, 150, 160) for controlling supply airflow temperature in a building,
wherein the supply airflow flows from an upstream position to a downstream position
along a supply airflow line (102), the supply airflow line comprising
- a first temperature-affecting device (104),
- a second temperature-affecting device (106) arranged in series with the first temperature-affecting
device (104),
- a first sensor (110) positioned at a first position downstream the first temperature-affecting
device (104), and
- a second sensor (112) positioned at a second position downstream the second temperature-affecting
device (106) and upstream the first temperature-affecting device (104),
characterized in that the system further comprises a common controller (116), wherein
- the common controller (116) is configured to receive a first actual value from the
first sensor (110), a second actual value from the second sensor (112), and a set-point
value from a receiver (142),
- the common controller (116) is configured to control the first temperature-affecting
device (104) based on the first actual value and the set-point value and thereby control
the supply airflow temperatures at the first position, and
- the common controller (116) is configured to control the second temperature-affecting
device (106) based on the second actual value and the set-point value and thereby
control the supply airflow temperatures at the second position.
2. The system according to claim 1, where
- in a case the first temperature-affecting device (104) is a heater the second temperature-affecting
device (106) is a cooler, and
- in a case the first temperature-affecting device (104) is a cooler the second temperature-affecting
device (106) is a heater.
3. The system according to any one of claims 1-2, wherein the first actual value and
the second actual value pertain to the temperature of the supply airflow at the first
position and the second position, respectively.
4. The system according to any one of claims 1-3, wherein
- the common controller (116) comprises a first sub-controller (136) and a second
sub-controller (138), wherein
- the first temperature-affecting device (104) and the second temperature-affecting
device (106) are controlled by a first and a second control signal, respectively,
and wherein
- the first control signal is associated with the first sub-controller (136) and the
second control signal is associated with the second sub-controller (138).
5. The system according to claim 4, wherein
- the first control signal controls a first control valve (124) associated with the
first temperature-affecting device (104), and
- the second control signal controls a second control valve (126) associated with
the second temperature-affecting device (106).
6. The system according to claim 5, where
- in a case the first control valve (124) is under operation the second control valve
(126) is either fully closed or fully opened, and
- in a case the second control valve (126) is under operation the first control valve
(124) is either fully closed or fully opened.
7. The system according to any one of claims 1-6, wherein the supply airflow line further
comprises
- a third sensor (114) positioned at a third position upstream the second temperature-affecting
device (106), and
- a third temperature-affecting device (108) positioned upstream the third sensor
(114),
wherein
- the common controller (116) is configured to receive a third actual value from the
third sensor (114),
- the common controller (116) is configured to control the third temperature-affecting
device (108) based on the third actual value and the set-point value and thereby control
the supply airflow temperature at the third position.
8. The system according to claim 7, wherein the third temperature-affecting device (108)
is a heat exchanger.
9. The system according to any one of claims 7-8, wherein the third actual value pertains
to the temperature of the supply airflow at the third position.
10. The system according to any one of claims 7-9, wherein
- the first and the second temperature-affecting devices (104, 106) receive a second
desired value during the control of the first and the second temperature-affecting
devices (104, 106), respectively, and wherein
- the second desired value is associated with a control error pertaining to the third
actual value and a desired value at the third position.
11. The system according to any one of claims 1-10, wherein
- the first temperature-affecting device (104) comprises a first body of water,
- the second temperature-affecting device (106) comprises a second body of water,
wherein
- the airflow temperature at the first position is affected by the first body of water,
and
- the airflow temperature at the second position is affected by the second body of
water.
12. A method for controlling supply airflow temperature in a building, the method comprising
- receiving, by a common controller (116), a first actual value from a first sensor
(110), wherein the first sensor (110) is located at a first position along a supply
airflow line (102),
- receiving, by the common controller (116), a set-point value from a receiver (142),
- receiving, by the common controller (116), a second actual value from a second sensor
(112), wherein the second sensor (112) is located at a second position along the supply
airflow line, characterized by
- controlling, by the common controller (116), a first temperature-affecting device
(104) based on the first actual value and the set-point value and thereby control
the supply airflow temperature at the first position, wherein the first temperature-affecting
device (104) is positioned upstream the first sensor (110) and downstream the second
sensor (112), and
- controlling, by the common controller (116), a second temperature-affecting device
(106) based on the second actual value and the set-point value and thereby control
the supply airflow temperature at the second position, wherein the second temperature-affecting
device (106) is positioned upstream the second sensor (112).
13. The method according to claim 12 wherein
- the first temperature-affecting device (104) is controlled by a first control signal
controlling a first control valve (124),
- the second temperature-affecting device (106) is controlled by a second control
signal controlling a second control valve (126), wherein
- in a case the first control valve (124) is under operation the second control valve
(126) is either fully closed or fully opened, and
- in a case the second control valve (126) is under operation the first control valve
(124) is either fully closed or fully opened.
14. The method according to any one of claims 12-13 further comprising
- receiving, by the common controller (116), a third actual value from a third sensor
(114), wherein the third sensor (114) is located at a third position upstream the
second temperature-affecting device (106) along the supply airflow line, and
- controlling, by the common controller (116), a third temperature-affecting device
(108) based on the third actual value and the set-point value and thereby control
the supply airflow temperature at the third position, wherein the third temperature-affecting
device (108) is positioned upstream the third sensor (114).
15. The method according to claim 14 when dependent on claim 13 wherein
- the third temperature-affecting devices (108) is controlled by a third control signal
controlling a third control valve (128), wherein
- in a case the first control valve (124) is under operation the second control valve
(126) and the third control valve (128) are independently either fully closed or fully
opened,
- in a case the second control valve (126) is under operation the first control valve
(124) and the third control valve (128) are independently either fully closed or fully
opened, and
- in a case the third control valve (128) is under operation the first control valve
(124) and the second control valve (126) are independently either fully closed or
fully opened.
1. System (101, 150, 160) zum Steuern einer Zuluftstromtemperatur in einem Gebäude, wobei
der Zuluftstrom von einer stromaufwärtigen Position zu einer stromabwärtigen Position
entlang einer Zuluftstromleitung (102) strömt, wobei die Zuluftstromleitung Folgendes
umfasst:
- eine erste die Temperatur beeinflussende Vorrichtung (104),
- eine zweite die Temperatur beeinflussende Vorrichtung (106), die mit der ersten
die Temperatur beeinflussenden Vorrichtung (104) in Reihe angeordnet ist,
- einen ersten Sensor (110), der an einer ersten Position stromabwärts von der ersten
die Temperatur beeinflussenden Vorrichtung (104) positioniert ist, und
- einen zweiten Sensor (112), der an einer zweiten Position stromabwärts von der zweiten
die Temperatur beeinflussenden Vorrichtung (106) und stromaufwärts von der ersten
die Temperatur beeinflussenden Vorrichtung (104) positioniert ist,
dadurch gekennzeichnet, dass das System weiterhin eine gemeinsame Steuereinheit (116) umfasst, wobei
- die gemeinsame Steuereinheit (116) dazu konfiguriert ist, einen ersten tatsächlichen
Wert von dem ersten Sensor (110), einen zweiten tatsächlichen Wert von dem zweiten
Sensor (112) und einen Sollwert von einem Empfänger (142) zu empfangen,
- die gemeinsame Steuereinheit (116) dazu konfiguriert ist, die erste die Temperatur
beeinflussende Vorrichtung (104) auf der Basis des ersten tatsächlichen Werts und
des Sollwerts zu steuern und dadurch die Zuluftstromtemperaturen an der ersten Position
zu steuern, und
- die gemeinsame Steuereinheit (116) dazu konfiguriert ist, die zweite die Temperatur
beeinflussende Vorrichtung (106) auf der Basis des zweiten tatsächlichen Werts und
des Sollwerts zu steuern und dadurch die Zuluftstromtemperaturen an der zweiten Position
zu steuern.
2. System nach Anspruch 1, wobei
- in einem Fall, in dem die erste die Temperatur beeinflussende Vorrichtung (104)
eine Heizvorrichtung ist, die zweite die Temperatur beeinflussende Vorrichtung (106)
eine Kühlvorrichtung ist, und
- in einem Fall, in dem die erste die Temperatur beeinflussende Vorrichtung (104)
eine Kühlvorrichtung ist, die zweite die Temperatur beeinflussende Vorrichtung (106)
eine Heizvorrichtung ist.
3. System nach einem der Ansprüche 1 - 2, wobei der erste tatsächliche Wert und der zweite
tatsächliche Wert die Temperatur des Zuluftstroms an der ersten Position bzw. der
zweiten Position betreffen.
4. System nach einem der Ansprüche 1 - 3, wobei
- die gemeinsame Steuereinheit (116) eine erste Untersteuereinheit (136) und eine
zweite Untersteuereinheit (138) umfasst, wobei
- die erste die Temperatur beeinflussende Vorrichtung (104) und die zweite die Temperatur
beeinflussende Vorrichtung (106) durch ein erstes bzw. ein zweites Steuersignal gesteuert
werden und wobei
- das erste Steuersignal mit der ersten Untersteuereinheit (136) assoziiert ist und
das zweite Steuersignal mit der zweiten Untersteuereinheit (138) assoziiert ist.
5. System nach Anspruch 4, wobei
- das erste Steuersignal ein erstes Steuerventil (124) steuert, das mit der ersten
die Temperatur beeinflussenden Vorrichtung (104) assoziiert ist, und
- das zweite Steuersignal ein zweites Steuerventil (126) steuert, das mit der zweiten
die Temperatur beeinflussenden Vorrichtung (106) assoziiert ist.
6. System nach Anspruch 5, wobei
- in einem Fall, in dem das erste Steuerventil (124) im Betrieb ist, das zweite Steuerventil
(126) entweder vollständig geschlossen oder vollständig geöffnet ist, und
- in einem Fall, in dem das zweite Steuerventil (126) im Betrieb ist, das erste Steuerventil
(124) entweder vollständig geschlossen oder vollständig geöffnet ist.
7. System nach einem der Ansprüche 1 - 6, wobei die Zuluftstromleitung weiterhin Folgendes
umfasst:
- einen dritten Sensor (114), der an einer dritten Position stromaufwärts von der
zweiten die Temperatur beeinflussenden Vorrichtung (106) positioniert ist, und
- eine dritte die Temperatur beeinflussende Vorrichtung (108), die stromaufwärts von
dem dritten Sensor (114) positioniert ist,
wobei
- die gemeinsame Steuereinheit (116) dazu konfiguriert ist, einen dritten tatsächlichen
Wert von dem dritten Sensor (114) zu empfangen,
- die gemeinsame Steuereinheit (116) dazu konfiguriert ist, die dritte die Temperatur
beeinflussende Vorrichtung (108) auf der Basis des dritten tatsächlichen Werts und
des Sollwerts zu steuern und dadurch die Zuluftstromtemperatur an der dritten Position
zu steuern.
8. System nach Anspruch 7, wobei die dritte die Temperatur beeinflussende Vorrichtung
(108) ein Wärmetauscher ist.
9. System nach einem der Ansprüche 7 - 8, wobei der dritte tatsächliche Wert die Temperatur
des Zuluftstroms an der dritten Position betrifft.
10. System nach einem der Ansprüche 7 - 9, wobei
- die erste und die zweite die Temperatur beeinflussende Vorrichtung (104, 106) einen
zweiten gewünschten Wert während der Steuerung der ersten bzw. der zweiten die Temperatur
beeinflussenden Vorrichtung (104, 106) empfangen und wobei
- der zweite gewünschte Wert mit einem Steuerfehler assoziiert ist, der den dritten
tatsächlichen Wert und einen gewünschten Wert an der dritten Position betrifft.
11. System nach einem der Ansprüche 1 - 10, wobei
- die erste die Temperatur beeinflussende Vorrichtung (104) eine erste Wassermasse
umfasst;
- die zweite die Temperatur beeinflussende Vorrichtung (106) eine zweite Wassermasse
umfasst, wobei
- die Luftstromtemperatur an der ersten Position von der ersten Wassermasse beeinflusst
wird und
- die Luftstromtemperatur an der zweiten Position von der zweiten Wassermasse beeinflusst
wird.
12. Verfahren zum Steuern einer Zuluftstromtemperatur in einem Gebäude, wobei das Verfahren
Folgendes umfasst:
- Empfangen eines ersten tatsächlichen Werts von einem ersten Sensor (110) durch eine
gemeinsame Steuereinheit (116), wobei der erste Sensor (110) sich an einer ersten
Position entlang einer Zuluftstromleitung (102) befindet,
- Empfangen eines Sollwerts von einem Empfänger (142) durch die gemeinsame Steuereinheit
(116),
- Empfangen eines zweiten tatsächlichen Werts von einem zweiten Sensor (112) durch
die gemeinsame Steuereinheit (116), wobei der zweite Sensor (112) sich an einer zweiten
Position entlang der Zuluftstromleitung befindet, gekennzeichnet durch
- Steuern einer ersten die Temperatur beeinflussenden Vorrichtung (104) auf der Basis
des ersten tatsächlichen Werts und des Sollwerts durch die gemeinsame Steuereinheit (116) und dadurch Steuern der Zuluftstromtemperatur an der ersten Position, wobei die erste die Temperatur
beeinflussende Vorrichtung (104) stromaufwärts von dem ersten Sensor (110) und stromabwärts
von dem zweiten Sensor (112) positioniert ist, und
- Steuern einer zweiten die Temperatur beeinflussenden Vorrichtung (106) auf der Basis
des zweiten tatsächlichen Werts und des Sollwerts durch die gemeinsame Steuereinheit (116) und dadurch Steuern der Zuluftstromtemperatur an der zweiten Position, wobei die zweite die Temperatur
beeinflussende Vorrichtung (106) stromaufwärts von dem zweiten Sensor (112) positioniert
ist.
13. Verfahren nach Anspruch 12, wobei
- die erste die Temperatur beeinflussende Vorrichtung (104) durch ein erstes Steuersignal
gesteuert wird, das ein erstes Steuerventil (124) steuert,
- die zweite die Temperatur beeinflussende Vorrichtung (106) durch ein zweites Steuersignal
gesteuert wird, das ein zweites Steuerventil (126) steuert, wobei
- in einem Fall, in dem das erste Steuerventil (124) im Betrieb ist, das zweite Steuerventil
(126) entweder vollständig geschlossen oder vollständig geöffnet ist, und
- in einem Fall, in dem das zweite Steuerventil (126) im Betrieb ist, das erste Steuerventil
(124) entweder vollständig geschlossen oder vollständig geöffnet ist.
14. Verfahren nach einem der Ansprüche 12 - 13, das weiterhin Folgendes umfasst:
- Empfangen eines dritten tatsächlichen Werts von einem dritten Sensor (114) durch
die gemeinsame Steuereinheit (116), wobei der dritte Sensor (114) sich an einer dritten
Position stromaufwärts von der die Temperatur beeinflussenden Vorrichtung (106) entlang
der Zuluftstromleitung befindet, und
- Steuern einer dritten die Temperatur beeinflussenden Vorrichtung (108) auf der Basis
des dritten tatsächlichen Werts und des Sollwerts durch die gemeinsame Steuereinheit
(116) und dadurch Steuern der Zuluftstromtemperatur an der dritten Position, wobei
die dritte die Temperatur beeinflussende Vorrichtung (108) stromaufwärts von dem dritten
Sensor (114) positioniert ist.
15. Verfahren nach Anspruch 14 bei Abhängigkeit von Anspruch 13, wobei
- die dritte die Temperatur beeinflussende Vorrichtung (108) durch ein drittes Steuersignal
gesteuert wird, das ein drittes Steuerventil (128) steuert, wobei
- in einem Fall, in dem das erste Steuerventil (124) im Betrieb ist, das zweite Steuerventil
(126) und das dritte Steuerventil (128) unabhängig voneinander entweder vollständig
geschlossen oder vollständig geöffnet sind,
- in einem Fall, in dem das zweite Steuerventil (126) im Betrieb ist, das erste Steuerventil
(124) und das dritte Steuerventil (128) unabhängig voneinander entweder vollständig
geschlossen oder vollständig geöffnet sind, und
- in einem Fall, in dem das dritte Steuerventil (128) im Betrieb ist, das erste Steuerventil
(124) und das zweite Steuerventil (126) unabhängig voneinander entweder vollständig
geschlossen oder vollständig geöffnet sind.
1. Système (101, 150, 160) pour commander la température de flux d'air d'alimentation
dans un bâtiment, dans lequel le flux d'air d'alimentation s'écoule à partir d'une
position en amont vers une position en aval le long d'une ligne de flux d'air d'alimentation
(102), la ligne de flux d'air d'alimentation comprenant :
- un premier dispositif affectant la température (104),
- un second dispositif affectant la température (106) disposé en série avec le premier
dispositif affectant la température (104),
- un premier capteur (110) positionné à une première position en aval du premier dispositif
affectant la température (104), et
- un second capteur (112) positionné à une seconde position en aval du second dispositif
affectant la température (106) et en amont du premier dispositif affectant la température
(104),
caractérisé en ce que le système comprend en outre un contrôleur commun (116), dans lequel
- le contrôleur commun (116) est configuré pour recevoir une première valeur effective
provenant du premier capteur (110), une seconde valeur effective provenant du second
capteur (112) et une valeur de point de consigne provenant d'un récepteur (142),
- le contrôleur commun (116) est configuré pour commander le premier dispositif affectant
la température (104) sur la base de la première valeur effective et la valeur de point
de consigne et commander ainsi la température de flux d'air d'alimentation à la première
position, et
- le contrôleur commun (116) est configuré pour commander le second dispositif affectant
la température (106) sur la base de la seconde valeur effective et de la valeur de
point de commande et ainsi commander les températures de flux d'air d'alimentation
à la seconde position.
2. Système selon la revendication 1, dans lequel
- dans un cas où le premier dispositif affectant la température (104) est un appareil
de chauffage le second dispositif affectant la température (106) est un refroidisseur
et
- dans un cas où le premier dispositif affectant la température (104) est un refroidisseur,
le second dispositif affectant la température (106) est un appareil de chauffage.
3. Système selon une quelconque des revendications 1 - 2, dans lequel la première valeur
effective et la seconde valeur effective se rapportent à la température du flux d'air
d'alimentation à la première position et la seconde position, respectivement.
4. Système selon une quelconque des revendications 1 - 3, dans lequel
- le contrôleur commun (116) comprend un premier sous contrôleur (136) et un second
sous contrôleur (138), dans lequel
- le premier dispositif affectant la température (104) et le second dispositif affectant
la température (106) sont commandés par un premier et un second signal de commande,
respectivement et dans lequel
- le premier signal de commande est associé au premier sous contrôleur (136) et le
second signal de commande est associé au second sous contrôleur (138).
5. Système selon la revendication 4, dans lequel
- le premier signal de commande commande une première soupape de commande (124) associée
au premier dispositif affectant la température (104) et
- le second signal de commande commande une seconde soupape de commande (126) associée
au second dispositif affectant la température (106).
6. Système selon la revendication 5, dans lequel
- dans un cas où la première soupape de commande (124) est en fonctionnement la seconde
soupape de commande (126) est soit totalement fermée soit totalement ouverte, et
- dans un cas où la seconde soupape de commande (126) est en fonctionnement la première
soupape de commande (124) est soit totalement fermée soit totalement ouverte.
7. Système selon une quelconque des revendications 1 - 6, dans lequel la ligne de flux
d'air d'alimentation comprend en outre
- un troisième capteur (114) positionné à une troisième position en amont du second
dispositif affectant la température (106), et
- un troisième dispositif affectant la température (108) positionné en amont du troisième
capteur (114),
dans lequel
- le contrôleur commun (116) est configuré pour recevoir troisième valeur effective
provenant du troisième capteur (114),
- le contrôleur commun (116) est configuré pour commander le troisième dispositif
affectant la température (108) sur la base de la troisième valeur effective et de
la valeur de point de consigne et commander ainsi la température de flux d'air d'alimentation
à la troisième position.
8. Système selon la revendication 7, dans lequel le troisième dispositif affectant la
température (108) est un échangeur thermique.
9. Système selon une quelconque des revendications 7 - 8, dans lequel la troisième valeur
effective se rapporte à la température du flux d'air d'alimentation à la troisième
position.
10. Système selon une quelconque des revendications 7 - 9, dans lequel
- le premier et le second dispositif affectant la température (104, 106) reçoivent
une seconde valeur désirée pendant la commande du premier et du second dispositif
affectant la température (104, 106) respectivement et dans lequel
- la seconde valeur désirée est associée à une erreur de commande se rapportant à
la troisième valeur effective et une valeur désirée à la troisième position.
11. Système selon une quelconque des revendications 1 - 10, dans lequel
- le premier dispositif affectant la température (104) comprend un premier corps d'eau,
- le second dispositif affectant la température (106) comprend un second corps d'eau,
dans lequel
- la température de flux d'air à la première position est affectée par le premier
corps d'eau, et
- la température de flux d'air à la seconde position est affectée par le second corps
d'eau.
12. Procédé de commande de la température du flux d'air d'alimentation dans un bâtiment,
le procédé comprenant de
- recevoir, par un contrôleur commun (116), une première valeur effective provenant
d'un premier capteur (110), dans lequel le premier capteur (110) est situé à une première
position le long d'une ligne de flux d'air d'alimentation (102),
- recevoir, par le contrôleur commun (116), une valeur de point de consigne provenant
d'un récepteur (142),
- recevoir, par le contrôleur commun (116), une seconde valeur effective provenant
d'un second capteur (112), dans lequel le second capteur (112) est situé à une seconde
position le long de la ligne de flux d'air d'alimentation, caractérisé par
- commander, par le contrôleur commun (116), un premier dispositif affectant la température
(104) sur la base de la première valeur effective et la valeur de point de consigne
et commander ainsi la température de flux d'air d'alimentation à la première position,
dans lequel le premier dispositif affectant la température (104) est positionné en
amont du premier capteur (110) et en aval du second capteur (112) et
- commander, par le contrôleur commun (116), un second dispositif affectant la température
(106) sur la base de la seconde valeur effective et de la valeur de point de consigne
et commander ainsi la température du flux d'air d'alimentation à la seconde position,
dans lequel le second dispositif affectant la température (106) est positionnée en
amont du second capteur (112).
13. Procédé selon la revendication 12, dans lequel
- le premier dispositif affectant la température (104) est commandée par un premier
signal de commande commandant une première soupape de commande (124),
- le second dispositif affectant la température (106) est commandée par un second
signal de commande commandant une seconde soupape de commande (126), dans lequel
- dans un cas où la première soupape de commande (124) est en fonctionnement la seconde
soupape de commande (126) est soit totalement fermée soit totalement ouverte, et
- dans un cas où la seconde soupape de commande (126) est en fonctionnement la première
soupape de commande (124) est soit totalement fermée soit totalement ouverte.
14. Procédé selon une quelconque des revendications 12 - 13, comprenant en outre de :
- recevoir, par le contrôleur commun (116), une troisième valeur effective provenant
d'un troisième capteur (114), dans lequel le troisième capteur (114) est situé à une
troisième position en amont du second dispositif affectant la température (106) le
long de la ligne de flux d'air d'alimentation, et
- commander, par le contrôleur commun (116), un troisième dispositif affectant la
température (108) sur la base de la troisième valeur effective et la valeur de point
de consigne et commander ainsi la température de flux d'air d'alimentation à la troisième
position, dans lequel le troisième dispositif affectant la température (108) est positionnée
en amont du troisième capteur (114).
15. Procédé selon la revendication 14 en dépendance de la revendication 13 dans lequel
- le troisième dispositif affectant la température (108) est commandé par un troisième
signal de commande commandant une troisième soupape de commande (128), dans lequel
- dans un cas où la première soupape de commande (124) est en fonctionnement la seconde
soupape de commande (126) et la troisième soupape de commande (128) sont soit totalement
fermée soit totalement ouverte de manière indépendante,
- dans un cas où la seconde soupape de commande (126) et en fonctionnement la première
soupape de commande (124) et la troisième soupape de commande (128) sont soit totalement
fermée soit totalement ouverte de manière indépendante, et
- dans un cas où la troisième soupape de commande (128) est en fonctionnement la première
soupape de commande (124) et la seconde soupape de commande (126) sont soit totalement
fermée soit totalement ouverte de manière indépendante.