Gas cooler

Patent metadata

Field	Value
Publication number	US-9939209-B2
Application number	US-201013124735-A
Country	US
Kind code	B2
Filing date	Feb 16, 2010
Priority date	Feb 23, 2009
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A gas cooler ( 10 ) which is provided with a heat exchanger ( 6 ), cools a gas to be cooled, which is introduced from the outside, by performing heat exchange between the gas to be cooled and the heat exchanger, and discharges the cooled gas to the outside. The heat exchanger includes: a plurality of heat transfer fins ( 8 ) which are placed side by side via a prescribed gap therebetween, the gas to be cooled flowing through the gaps; and heat transfer tubes ( 7 ) which pierce through the plurality of heat transfer fins and are provided in a plurality of rows along the direction in which the gas to be cooled flows. The outside diameter d o of the heat transfer tubes is 20 to 30 mm.

First claim

The invention claimed is:

1. A gas cooler for cooling a heated gas having a temperature of at least 100° C. by performing heat exchange between the gas to be cooled and the heat exchanger, and discharging a cooled gas to the outside,
the gas cooler including a heat exchanger comprising:
a plurality of heat transfer fins which are placed side by side via prescribed caps therebetween so that the gas to be cooled can flow through the gaps; and
heat transfer tubes which pierce through the plurality of heat transfer fins and are provided in a plurality of rows along a direction in which the gas to be cooled flows,
wherein an outside diameter d o of the heat transfer tubes is 20 to 30 mm,
wherein a pitch of the heat transfer tubes in a direction orthogonal to the direction in which the gas to be cooled flows is denoted by S 1 and a pitch of the heat transfer tubes in the direction in which the gas to be cooled flows is denoted by S 2 ,
wherein the outside diameter of the heat transfer tubes is expanded by pressing a die into the heat transfer tubes and the tube expansion ratio of the heat transfer tubes is 0.3 to 1.5%, where tube expansion ratio (%)={outside diameter of heat transfer tube after tube expansion d TO2 −inside diameter of heat transfer fin before tube expansion d fin1 }/inside diameter of heat transfer fin before tube expansion d fin1 ×100≅{(outside diameter of die d D +wall thickness of heat transfer tube Δ d T )−inside diameter of heat transfer fin before tube expansion d fin1 }/inside diameter of heat transfer fin before tube expansion d fin1 ×100,
wherein the pitch S 1 and the pitch S 2 of the heat transfer tubes are 35 to 45 mm.

2. The gas cooler according to claim 1 , wherein the outside diameter d o of the heat transfer tubes is 23 to 27 mm.

3. The gas cooler according to claim 1 , wherein the heat transfer fins and the heat transfer tubes are joined via a filling material.

4. The gas cooler according to claim 3 , wherein the filling material is a thermally conductive adhesive.

5. The gas cooler according to claim 1 , wherein the tube expansion ratio of the heat transfer tubes is 0.5 to 1.0%.

6. The gas cooler according to claim 2 , wherein the heat transfer fins and the heat transfer tubes are joined via a filling material.

7. The gas cooler according to claim 6 , wherein the filling material is a thermally conductive adhesive.

Assignees

• Yokoo Kazutoshi
• Horie Shigenari
• Yoshikawa Masashi
• Takeda Tomoaki
• Mizushita Koichi
• Tanaka Kazunari
• Mitsubishi Heavy Ind Ltd

Inventors

• Yokoo Kazutoshi
• Horie Shigenari
• Yoshikawa Masashi
• Takeda Tomoaki
• Mizushita Koichi
• Tanaka Kazunari

Classifications

• F28F1/32 Primary

  the means having portions engaging further tubular elements · CPC title

• F28D7/16

  the conduits being arranged in parallel spaced relation ({F28D7/0008 - F28D7/0058 take precedence}; F28D7/02 - F28D7/10 take precedence) · CPC title

• F28D7/10 Primary

  the conduits being arranged one within the other, e.g. concentrically {(multiple wall tubes for leak detection F28F1/003)} · CPC title

• F28F1/10

  Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08) · CPC title

• F28D7/08

  the conduits being otherwise bent, e.g. in a serpentine or zig-zag (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)} · CPC title