公开(公告)号：US11662140B2

公开(公告)日：2023-05-30

申请号：US16465529

申请日：2017-12-04

Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Tomohiro Sakamoto ,  Hidetaka Miyazaki ,  Naotaka Yamazoe ,  Daisuke Kariya ,  Yasuo Miwa ,  Yuichi Saitou ,  Yosuke Kimura ,  Toshihiro Komiya ,  Yoshihiro Matsuda ,  Keisuke Nakagawa

IPC: F25J1/02 ,  F25B9/02 ,  F25J1/00

CPC classification number: F25J1/0204 ,  F25B9/02 ,  F25J1/001 ,  F25J1/005 ,  F25J1/0005 ,  F25J1/0007 ,  F25J1/0052 ,  F25J1/0062 ,  F25J1/0065 ,  F25J1/0067 ,  F25J1/0221 ,  F25J1/0244 ,  F25J1/0298 ,  F25J2210/42 ,  F25J2215/32 ,  F25J2270/16

Abstract: A raw material gas liquefying device includes a feed line; a refrigerant circulation line; and a controller. In a refrigerant liquefaction route, a refrigerant flows through a compressor, a heat exchanger, a circulation system JT valve, a liquefied refrigerant storage tank, and the heat exchanger, and returns to the compressor. In a cryogenic energy generation route, the refrigerant flows through the compressor, the heat exchanger, an expansion unit, and the heat exchanger, and returns to the compressor. The controller determines if a refrigerant storage tank liquid level is within an allowable range, manipulates a feed system JT valve opening rate to control refrigerant temperature at the high-temperature-side refrigerant flow path exit side of the heat exchanger, and manipulates the opening rate of the feed system JT valve to control the refrigerant storage tank liquid level so that the refrigerant storage tank liquid level falls into the predetermined allowable range.