BOIL-OFF GAS RELIQUEFACTION DEVICE - MITSUBISHI HEAVY IND LTD

Title:

BOIL-OFF GAS RELIQUEFACTION DEVICE

Document Type and Number:

WIPO Patent Application WO/2012/043274

Kind Code:

A1

Abstract:

Provided is a boil-off gas reliquefaction device that devises a disposition of equipment to be installable even in existing LNG carriers and that has a refrigeration cycle unit that reduces thermal load, is compact, and is highly efficient. The boil-off gas reliquefaction device (1) has: a liquefaction processing unit (5) having a BOG supply pipework (35), a fuel compressor (33), and a BOG transport pipework (39); and a refrigeration cycle unit (3) that further lowers the temperature of a coolant from a coolant compressor (6) by means of an expander (13) and that has a condenser (17) that cools BOG passing through the BOG transport pipework (39). The liquefaction processing unit (5) is provided with a BOG precooler (57) that performs heat exchange between BOG passing through the BOG transport pipework (39) on the upstream side of the condenser (17) and BOG passing through the BOG supply pipework (35). The refrigeration cycle unit (3) is provided with: a booster compressor (19) that is driven on the downstream side of the condenser (17) by the expander (13); and a second aftercooler (29) that cools the coolant from the booster compressor (19).

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Inventors:

OKA MASARU (JP)

Application Number:

PCT/JP2011/071216

Publication Date:

April 05, 2012

Filing Date:

September 16, 2011

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)
OKA MASARU (JP)

International Classes:

B63B25/16; C10L3/06; F17C13/00; F25J1/00; F25J3/06

Foreign References:

JP2010025152A	2010-02-04
JP2009204080A	2009-09-10
JPH10204455A	1998-08-04
JP2010025152A	2010-02-04

Other References: