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《Cryogenic Technology》 2012-01
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Analysis of decrease of heat exchange efficiency of inner fin tube heat exchanger

Zhang Qingsheng(Kaifeng Dongjing Air Separation Group Co.,Ltd.,8# Beiguan Street,Kaifeng 475001,Henan,P.R.China)  
After use for a period of inner fin tube heat exchanger,the heat exchange efficiency decreases,which is mainly attributed to followings: blocking of tube due to improper positioning between the corrugated fin and inner tube;short circuit and change of heat exchange coefficient resulted from middle pores due to thin head of the closure at one end of the inner tube;and poor soldering quality and even blocking of the passage resulted from peeling off soldered location of inner fin heat exchange tube due to incomplete cleaning of inner(outer) tube and fins.Here,the methods used in machining of inner fin heat exchange tube for eliminating the above-mentioned problems are detailed.
【CateGory Index】: TK172
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