采用折叠扁管与挤压扁管的微通道换热器长效特性

doi:10.3969/j.issn.0438-1157.2013.07.009

化工学报 ›› 2013, Vol. 64 ›› Issue (7): 2369-2375.DOI: 10.3969/j.issn.0438-1157.2013.07.009

采用折叠扁管与挤压扁管的微通道换热器长效特性

韦伟¹, 徐坤豪², 梁媛媛¹, 陈江平¹

1. 上海交通大学制冷与低温工程研究所, 上海 200240;
2. 萨帕铝热传输(上海)有限公司, 上海 201807

收稿日期:2012-11-05 修回日期:2013-01-23 出版日期:2013-07-05 发布日期:2013-07-05
通讯作者: 陈江平
作者简介:韦伟(1987- ),男,硕士研究生。
基金资助:
"十二五"国家科技支撑项目(SQ2011GX03D03999)。

Long-term performance of microchannel heat exchanger with folded tube and extruded tube

WEI Wei¹, XU Kunhao², LIANG Yuanyuan¹, CHEN Jiangping¹

1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Sapa Heat Transfer (Shanghai)Co.Ltd., Shanghai 201807, China

Received:2012-11-05 Revised:2013-01-23 Online:2013-07-05 Published:2013-07-05
Supported by:
supported by the Key Technologies R&D Program of China during the 12th Five-Year Plan Period(SQ2011GX03D03999).

摘要/Abstract

摘要： 对采用折叠扁管与传统挤压扁管的微通道换热器长效特性进行了对比研究。分别进行了标准盐雾腐蚀实验,对比腐蚀前后两个换热器样品的换热量、空气侧压降和总热阻变化情况,结果表明,折叠扁管的样品在腐蚀后的各项性能均优于挤压管的样品。传统挤压扁管样件的翅片与扁管连接处率先被腐蚀破坏,14 d腐蚀后就可观察明显的翅片脱落现象,且在28 d腐蚀后挤压扁管上出现泄漏;折叠扁管样件则是翅片率先被腐蚀,而翅片与扁管的连接处没有明显损坏,在49 d腐蚀后折叠扁管没有出现泄漏现象。这是由于折叠扁管能方便地配备保护层,实现牺牲翅片保护扁管的方法,在腐蚀过程中能有效地保护更为重要的扁管。折叠扁管的长效特性优于传统挤压扁管。

关键词: 腐蚀, 微通道换热器, 挤压扁管, 折叠扁管, 长效性, 金相分析

Abstract: Corrosion is one of the main characters of Al microchannel heat exchanger.In the present study,standard seawater acidified test (SWAAT)was carried out in microchannel heat exchangers with folded tube and traditional extruded tube,then the performance test and electron metallography analysis were carried on the test samples before and after the corrosion.The result showed that the performance of the sample with folded tube was much better than that with traditional extruded tube after SWAAT.According to the electron metallography analysis,for the test sample with extruded tube,the connection of fins and tubes was damaged first in the SWAAT.Obvious fin debonding occurred after 14 d of SWAAT,and leakage happened on the tube at main body after 28 d of SWAAT.In contrast,the fins of the test sample with folded tube were damaged first in the SWAAT,and no any fin debonding or leakage on the tube occurred after 49 d of SWAAT.The long-term performance of folded tube is better than that of extruded tube.

Key words: corrosion, microchannel heat exchanger, extruded tube, folded tube, long-term performance, electron metallography analysis

中图分类号:

TB65

韦伟, 徐坤豪, 梁媛媛, 陈江平. 采用折叠扁管与挤压扁管的微通道换热器长效特性[J]. 化工学报, 2013, 64(7): 2369-2375.

WEI Wei, XU Kunhao, LIANG Yuanyuan, CHEN Jiangping. Long-term performance of microchannel heat exchanger with folded tube and extruded tube[J]. CIESC Journal, 2013, 64(7): 2369-2375.

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采用折叠扁管与挤压扁管的微通道换热器长效特性

Long-term performance of microchannel heat exchanger with folded tube and extruded tube

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