The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2014
Filed:
Feb. 26, 2009
Masaru Oka, Nagasaki, JP;
Sai Hiramatsu, Nagasaki, JP;
Hitoshi Kondo, Kariya, JP;
Yoshimasa Ohashi, Kariya, JP;
Shigeo Nagaya, Nagoya, JP;
Tsutomu Tamada, Nagoya, JP;
Masaru Oka, Nagasaki, JP;
Sai Hiramatsu, Nagasaki, JP;
Hitoshi Kondo, Kariya, JP;
Yoshimasa Ohashi, Kariya, JP;
Shigeo Nagaya, Nagoya, JP;
Tsutomu Tamada, Nagoya, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A liquefied gas reliquefier reliquefies boil-off gas resulting from evaporation of liquefied gas in a liquefied-gas storage tank to prevent a rise in the internal pressure of the liquefied-gas storage tank. The liquefied gas reliquefier includes a cooling unit for liquefying a secondary refrigerant, a liquefied-secondary-refrigerant feeding unit for feeding the liquefied secondary refrigerant, and a heat exchange unit disposed in the secondary-refrigerant circulating channel to condense the BOG by heat exchange between the BOG and the liquefied secondary refrigerant. The heat exchange unit is disposed near the liquefied-gas storage tank. The cooling unit includes a plurality of pulse-tube refrigerators. The number of pulse-tube refrigerators in operation and/or the cooling capacities of the individual pulse-tube refrigerators are controlled based on a measurement result from at least one of a thermometer, a pressure gauge, and a pump discharge flow meter installed in the liquefied-gas storage tank.