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首页> 外文期刊>International Journal of Dairy Technology >A study of methods for evaluating the integrity of plate type heat exchangers used in the dairy industry
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A study of methods for evaluating the integrity of plate type heat exchangers used in the dairy industry

机译：乳业用板式换热器完整性评估方法的研究

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摘要

An overview of leak testing methods for heat exchangers is presented The problems associated with the presence of residual liquid during testing were assessed as it was shown experimentally that complete drainage of plate type heat exchangers is very difficult. A theoretical modelling of small leaks in heat exchanger plates was combined with laboratory experiments. The strengths and weaknesses of electrolytic differential analysis and helium leak detection methods are presented. The electrolytic differential analysis method is capable of detecting smaller leak volumes than the helium leak detection method, in the presence of water, assuming a 0.5 #mu#S/cm and 0.1 ppm helium detection limit for the former and latter cases respectively. The test pressure was shown to be a significant factor in the detection of very small holes; this was a particularly important criterion for gas based hole detection methods in the presence of water.
机译：介绍了换热器的泄漏测试方法的概述。由于实验证明板式换热器的完全排水非常困难，因此评估了测试期间与残留液体有关的问题。将热交换器板中小泄漏的理论模型与实验室实验相结合。介绍了电解差异分析和氦气泄漏检测方法的优缺点。假设在前者和后者情况下的氦气检出限分别为0.5＃mu＃S / cm和0.1 ppm，则在水存在下，电解差分分析法能够检测到比氦气检漏法小的泄漏量。测试压力是检测非常小的孔的重要因素。对于存在水的基于气体的孔探测方法，这是一个特别重要的标准。

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