A COMPARATIVE STUDY OF FIN-AND-TUBE HEAT EXCHANGERS WITH AND WITHOUT LIQUID-VAPOR SEPARATION IN AIR CONDITIONING UNITS

Y. Chen; N. Hua; D. Wu

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A COMPARATIVE STUDY OF FIN-AND-TUBE HEAT EXCHANGERS WITH AND WITHOUT LIQUID-VAPOR SEPARATION IN AIR CONDITIONING UNITS

机译：空调装置中有无液体分离的翅片管换热器的比较研究

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摘要

A novel structure of condensers was introduced in the article. It was composed of finned tube rows with a pair of manifolds at either end. The manifolds not only divided refrigerant into several passes, but also made refrigerant condensate drain away from vapor-liquid mixture automatically after each tube pass. The performances of two refrigeration units fixed this novel condenser and a common one was investigated experimentally under outdoor ambient conditions (21-43℃). A small temperature change condensation zone was found in the novel condenser and its pressure drops were smaller (42.8-68.4%) than the normal one. Compared with the common unit, mass flux became greater but sub-cooling was smaller in the novel one except that the discharge pressures of the compressor in the two units were almost similar at the same heat source temperature. The energy efficiency ratio (EER) in the novel unit was improved by 2.8-7.2% under the experimental conditions.

机译：本文介绍了一种新型的冷凝器结构。它由带翅片的管排组成，两端各有一对歧管。歧管不仅将制冷剂分成几遍，而且还使制冷剂的冷凝水在每次通过管道后自动从气液混合物中排出。固定了这台新型冷凝器的两个制冷机组的性能，并在室外环境条件（21-43℃）下进行了实验研究。在新型冷凝器中发现一个小的温度变化冷凝区，其压降比正常冷凝器小（42.8-68.4％）。与普通单元相比，新型单元中的质量通量变大了，但过冷却减小了，只是在相同的热源温度下，两个单元中压缩机的排气压力几乎相似。在实验条件下，新型装置的能效比（EER）提高了2.8-7.2％。

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来源
《International journal of green energy》 |2014年第5期|488-499|共12页
作者
Y. Chen; N. Hua; D. Wu;
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作者单位

Faculty of Material and Energy Engineering, Guangdong University of Technology, Guangzhou 510006, China;

Faculty of Material and Energy Engineering, Guangdong University of Technology, Guangzhou, China;

Lab of Phase-change and Interfacial Transport Phenomena, Department of Thermal Engineering, Tsinghua University, Beijing, China;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Fin-and-tube condenser; Liquid-vapor separation; Pressure drop; Thermal performance;

机译：翅片管冷凝器;液汽分离;压力下降;热性能;

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A COMPARATIVE STUDY OF FIN-AND-TUBE HEAT EXCHANGERS WITH AND WITHOUT LIQUID-VAPOR SEPARATION IN AIR CONDITIONING UNITS

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