Global Patent Index - EP 2392825 A3

EP 2392825 A3 20111221 - Method for controlling the operation of a multistage boil-off gas (BOG) compressor

Title (en)

Method for controlling the operation of a multistage boil-off gas (BOG) compressor

Title (de)

Verfahren zur Steuerung eines mehrstufigen BOG-Kompressors

Title (fr)

Procédé de commande du fonctionnement d'un compresseur à plusiers étages pour des vapeurs émassant de gaz naturel liquéfié

Publication

EP 2392825 A3 20111221 (EN)

Application

EP 11166316 A 20110517

Priority

JP 2010129956 A 20100607

Abstract (en)

[origin: EP2392825A2] Method for controlling the operation of a BOG multistage compressor (8) including plural stages of compression sections (9,10), which are connected with each other, for compressing boil-off gas (BOG) generated from liquefied natural gas. The method comprises, in case of a predetermined condition, making a ratio of a load on a low pressure stage compression section to a load on a high pressure stage compression section (load ratio) smaller than load ratios in case of conditions other than the predetermined condition. The said predetermined condition is, either a condition where the suction temperature of the low pressure stage compression section (9) is not lower than a first preset temperature, or a condition where the discharge temperature of the low pressure stage compression section (9) is not lower than a second preset temperature. This control method prevents the temperature of the low pressure stage compression section (9) from exceeding a maximum allowable temperature.

IPC 8 full level

F04B 49/00 (2006.01); F04B 25/00 (2006.01); F04B 49/06 (2006.01); F04B 49/10 (2006.01); F17C 9/02 (2006.01)

CPC (source: EP)

F04B 25/00 (2013.01); F04B 49/065 (2013.01); F04B 49/10 (2013.01); F04B 2205/10 (2013.01); F04B 2205/11 (2013.01); F04B 2205/112 (2013.01); F04B 2207/01 (2013.01); F17C 2221/033 (2013.01); F17C 2223/0161 (2013.01); F17C 2223/033 (2013.01); F17C 2223/043 (2013.01); F17C 2223/046 (2013.01); F17C 2225/0123 (2013.01); F17C 2225/035 (2013.01); F17C 2227/0135 (2013.01); F17C 2227/0157 (2013.01); F17C 2227/0185 (2013.01); F17C 2227/0318 (2013.01); F17C 2227/0393 (2013.01); F17C 2250/032 (2013.01); F17C 2250/043 (2013.01); F17C 2250/0439 (2013.01); F17C 2250/0636 (2013.01); F17C 2250/072 (2013.01); F17C 2260/023 (2013.01); F17C 2265/037 (2013.01); F17C 2265/05 (2013.01); F17C 2270/0136 (2013.01); F17C 2270/0581 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2392825 A2 20111207; EP 2392825 A3 20111221; EP 2392825 B1 20190116; CN 102269154 A 20111207; CN 102269154 B 20141203; JP 2011256735 A 20111222; JP 5391154 B2 20140115

DOCDB simple family (application)

EP 11166316 A 20110517; CN 201110149003 A 20110603; JP 2010129956 A 20100607