水冷套管式CO_2气冷器的设计及实验研究

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。

Design and Experimental Study on CO2 Water-cooled Tube-in-tube Gas Cooler

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 CO2 in the inner tubes and water between inner and outer tubes. Experimental investigations were done about the effect of CO2 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 CO2 mass flow rate increases, and heat exchanger efficiency reduce gradually when CO2 mass flow rate increases. In the same CO2 mass flow rate, heat transfer coefficient, heat transfer and heat exchanger efficiency increase with the increase of CO2 inlet pressure and decrease while cooling water temperature increases.