Characteristics of cooling heat transffer and pressure drop of carbon dioxide in smooth and micro-fin tubes at a supercritical pressure

被引：0

作者：

Koyama, Shigeru ^{[1
]}

Kuwahara, Ken ^{[1
]}

Lee, Sang-Mu ^{[2
]}

Ito, Daisuke ^{[3
]}

Hatomura, Takeshi ^{[3
]}

Park, Byung-Duck ^{[4
]}

机构：

[1] Kyushu Univ, Inst Mat Chem & Engn, 6-1 Kasuga Koen, Kasuga, Fukuoka 8168580, Japan

[2] Hatano Plant Kobelco & Mat Copper Tube Ltd, Hatano 2570015, Japan

[3] Kyushu Univ, Int Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan

[4] Sangju Natl Univ, Dept Automot Engn, Sangju 742178, South Korea

来源：

PROCEEDINGS OF THE 3RD ASIAN CONFERENCE ON REFRIGERATION AND AIR-CONDITIONING VOLS I AND II | 2006年

关键词：

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experimental study for gas cooler at a supercritical pressure was conducted to investigate the heat transfer and pressure drop characteristics for almost pure CO2 and CO2 oil mixtures. A smooth copper tube and a micro-fin copper tube are used as the inner tube of double-pipe counter-flow heat exchanger. In the case of almost pure CO2, it is confirmed that the local heat transfer coefficient of the micro-fin tube is higher than these of the smooth tube, and the values of pressure drop for micro-fin tube are higher than those of smooth tube. In the case of the CO2 oil mixtures, the local heat transfer coefficient decrease with the increase of oil concentration for the micro-fin tubes. It is concluded that amount of oil concentration has much effect to deteriorate the heat transfer performance.

引用

页码：245 / +

页数：2

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