小通道冷凝器的两相传热系数

IRPN: Science Pub Date : 2017-12-21 DOI:10.2139/ssrn.3101285
V. Bhatkar, V. Kriplani, G. Awari
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引用次数: 0

摘要

蒸汽压缩制冷(VCR)系统的设计,开发和制造用于测试替代制冷剂,如R152a, R600a, R290和R290/R600a的混合物(50/50 wt %)超过目前使用的R134a与铝制小通道冷凝器。在试验装置中,加热器组通过PID控制器控制冷凝温度和蒸发器温度以及过冷和过热温度。所有制冷剂的冷凝温度范围为40至55℃,蒸发温度范围为-15至15℃。与传统冷凝器相比,小通道冷凝器大大减少了制冷剂充注量。从实验数据点出发,建立了两相冷凝换热系数的关系式,并与已有的关系式相吻合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Two Phase Heat Transfer Coefficient for Minichannel Condensers
Vapour compression refrigeration (VCR) system was designed, developed and fabricated for testing alternative refrigerants such as R152a, R600a, R290 and mixture of R290/R600a (50/50 by wt %) over presently used R134a with aluminium minichannel condenser. In the test set up, heater bank was provided for controlling condensation temperature and evaporator temperature along with sub-cooling and superheating temperature by using PID controllers. All the refrigerants were tested for condensation temperature ranging from 40 to 55 °C while evaporation temperature ranges from -15 to 15 °C. Refrigerant charge was reduced drastically with the minichannel condenser over the conventional condenser. Two phase condensation heat transfer coefficient correlation was developed from the experimental data points to design minichannel and conventional condenser and found in good agreement with the existing well known correlations.
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