螺旋槽纹管式CO_(2)气冷器的实验研究  

Experimental Study on Spiral Corrugated Tubes CO_(2) Gas Cooler

作　　者：吕静[1] 张耀文 张旭[1] 李世豪 LYU Jing;ZHANG Yaowen;ZHANG Xu;LI Shihao(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《制冷技术》2024年第6期21-27,共7页Chinese Journal of Refrigeration Technology

摘　　要：设计了一台采用螺旋槽纹管的CO_(2)气冷器,并对换热特性进行了实验研究,研究了CO_(2)入口温度、CO_(2)入口压力、CO_(2)质量流量、膨胀阀开度、冷却水温度和冷却水流量对设备性能的影响。结果表明:随着CO_(2)质量流量的增高,单位管长换热量先减少后增多;随着膨胀阀开度逐渐增大,总换热量先增多后减少,当阀门开度为30%时,总换热量达到实验室条件下最大值;随着CO_(2)进口压力的增高,单位管长换热量增多;冷却水进口流量越多,系统的制热效率越高。名义工况最高性能系数(COP)可达4.08,夏季最高COP可达4.46,冬季最高COP达3.78,与采用传统套管式热水器和CO_(2)热泵热水器比较,最大COP分别提高27.5%、23.9%和14.5%,因此采用螺旋槽纹管气冷器可以显著提升热泵性能。A CO_(2) gas cooler with spiral corrugated tubes is designed,and experimental research is conducted on its heat transfer characteristics.The effects of CO_(2) inlet temperature,CO_(2) inlet pressure,CO_(2) mass flow rate,expansion valve opening,cooling water temperature,and cooling water flow rate on the performance of the device are investigated.The results show that with the increase of CO_(2) mass flow rate,the heat transfer rate per unit tube length first increase and then decrease.When the opening of expansion valve increases gradually,the total heat exchange of the system increases first and then decreases,and maximum value appears at 30%expansion valve opening.Heat transfer coefficient increase with the increase of CO_(2) inlet pressure.The increases with the heating efficiency of the system increase with the increase of cooling water.The maximum coefficient of performance(COP)under nominal operating conditions can reach 4.08,with a maximum COP of 4.46 in summer and a maximum COP of 3.78 in winter.Compared with traditional sleeve-type water heaters and CO_(2) heat pump water heaters,the maximum COP is increased by 27.5%,23.9%,and 14.5%,respectively.Therefore,the performance of heat pump can be improved obviously by using spiral corrugated tubes gas cooler.

关 键 词：气冷器 换热性能 螺旋槽纹管 

分 类 号：TB611[一般工业技术—制冷工程] TQ051.5[化学工程]