摘要
本文设计了一台CO_2套管式气冷器并对其进行了换热特性的实验研究。该气冷器采用逆流三重套管,CO_2在内管流动,冷却水在内外管间流动。实验研究了不同CO_2质量流量、入口压力和冷却水温度对传热系数、换热量和换热器效能系数的影响。实验结果表明,随着CO_2质量流量的增加,传热系数和换热量均呈先增后减的趋势,换热器效能系数逐渐减小;CO_2质量流量不变时,传热系数、换热量和换热器效能系数均随气冷器CO_2入口压力的升高而逐渐增大;随着冷却水温度的升高,传热系数、换热量和换热器效能系数均逐渐减小。
A water-cooled tube-in-tube gas cooler was designed in this paper,and experimental researches on it were conducted. A triple tube is equipped in the gas cooler with CO_2 in the inner tubes and water between inner and outer tubes. Experimental investigations were done about the effect of CO_2 mass flow rate,inlet pressure and cooling water temperature on heat transfer coefficient,heat transfer and heat exchanger efficiency. The results show that both heat transfer coefficient and heat transfer firstly increase and then decrease while CO_2 mass flow rate increases,and heat exchanger efficiency reduce gradually when CO_2 mass flow rate increases. In the same CO_2 mass flow rate,heat transfer coefficient,heat transfer and heat exchanger efficiency increase with the increase of CO_2 inlet pressure and decrease while cooling water temperature increases.
出处
《制冷学报》
CAS
CSCD
北大核心
2016年第2期113-118,共6页
Journal of Refrigeration
基金
沪江基金(D14003)
上海理工大学教育教学改革研究(2015-JPBKZ-005)项目资助~~
关键词
套管式气冷器
换热性能
三重套管
tube-in-tube gas cooler
heat transfer performance
triple tube
