Raw material gas liquefying device and method of controlling this raw material gas liquefying device

A raw material gas liquefaction device comprises: a feed line that supplies a raw material gas; a refrigerant circulation line that circulates refrigerant and that has a turbine expander to generate cold heat by expanding the refrigerant in order to cool the raw material gas and an expander inlet va...

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Bibliographische Detailangaben
Hauptverfasser:	Kimura, Yosuke, Yamazoe, Naotaka, Sakamoto, Tomohiro, Miwa, Yasuo, Saitou, Yuichi, Miyazaki, Hidetaka, Kariya, Daisuke
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MACHINES OR ENGINES IN GENERAL MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING MIXTURES BY PRESSURE AND COLD TREATMENT NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING STEAM ACCUMULATORS STEAM ENGINE PLANTS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A raw material gas liquefaction device comprises: a feed line that supplies a raw material gas; a refrigerant circulation line that circulates refrigerant and that has a turbine expander to generate cold heat by expanding the refrigerant in order to cool the raw material gas and an expander inlet valve provided on the inlet side of the expander; a heat exchanger by which heat exchange is performed between the raw material gas and the refrigerant; a cooler that performs the initial cooling of the raw material gas and refrigerant by way of heat exchange with liquid nitrogen; and a control device that performs feedback control so that the rotational speed of the expander matches a prescribed target value by manipulating the expander inlet valve opening while starting and stopping the expander.