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(11) | EP 0 709 625 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Heating and cooling system and pump therefor |
| (57) A system (2) for heating and/or cooling a plurality of separate locations in a building
(4) comprising two heat-transfer circuits (6,7), each circuit (6,7) adapted to circulate
a heat transfer medium from a heat source and/or a heat sink to a heat exchanger in
each location, wherein the first heat-transfer circuit is able to supply the net cooling
requirement of the heat exchangers and the second heat-transfer circuit is able to
supply the net heating requirement of the heat exchangers during periods of conflicting
requirements, and wherein both heat-transfer circuits (6,7) are able to supply the
overall cooling requirement and the overall heating requirement of all the heat exchangers
is described. Also described is a heat pump unit (28) comprising a circuit (30) containing a heat-transfer medium which connects two or more primary heat exchangers (31,32), each heat exchanger being able to exchange heat with an associated heat-transfer circuit, with one or more compressors (34) between the primary heat exchangers (31) and one or more secondary heat exchangers (32) adapted to alter if necessary the temperature of the heat-transfer medium in the circuit, suitable for use with the system for heating and/or cooling also described herein. |