WASTE-HEAT RECOVERY SYSTEM IN OIL-COOLED GAS COMPRESSOR

Title:

WASTE-HEAT RECOVERY SYSTEM IN OIL-COOLED GAS COMPRESSOR

Document Type and Number:

WIPO Patent Application WO/2014/115616

Kind Code:

A1

Abstract:

The purpose of the present invention is: to enable hot water at a required temperature to be supplied, even in cases when compressor load factor is low; to suppress heat dissipation from a waste-heat recovery device; and to improve waste-heat recovery rate. A waste-heat recovery system in an oil-cooled gas compressor is provided with: a compressor main body (3); an oil separator (6); gas piping (8) which supplies, to a demanded destination, compressed gas separated from oil by the oil separator; oil piping (7) which returns, to the compressor main body, the oil separated by the oil separator; and a waste-heat-recovery heat exchanger (10) which recovers heat from the compressed gas and/or the oil. The waste-heat recovery system is also provided with: a hot-water storage tank (19); circulation circuits (17, 18) in which a heat medium is made to circulate between the waste-heat-recovery heat exchanger and the hot-water storage tank; a circulation pump (22) provided to these circulation circuits; and a control device (32) which, in cases when the temperature of the oil or the compressed gas subjected to heat exchange in the waste-heat-recovery heat exchanger is equal to or less than the temperature of the hot water in the hot-water storage tank, stops the circulation pump or reduces the rotational frequency of the circulation pump.

Inventors:

YAMAMOTO KENTARO (JP)
TAKANO MASAHIKO (JP)

Application Number:

PCT/JP2014/050548

Publication Date:

July 31, 2014

Filing Date:

January 15, 2014

Export Citation:

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Assignee:

HITACHI IND EQUIPMENT SYS (JP)

International Classes:

F04C28/08; F04B41/00; F04C25/02; F04C29/02; F04C29/04

Domestic Patent References:

WO2007114187A1

2007-10-11

Foreign References:

JP2012067743A	2012-04-05
JPS61179387U	1986-11-08
JPS5867981A	1983-04-22
JP2010038385A	2010-02-18
JP2003172498A	2003-06-20
JP2006250523A	2006-09-21
JP4329875B1	2009-09-09
JP2012067743A	2012-04-05

Other References: