CO_(2)热泵系统气冷器的热力学性能分析  

Thermodynamic Performance Analysis of Gas Cooler in CO_(2) Heat Pump Systems

作　　者：张朋[1] 姚秋峰 杨雨燊 彭旭[1] 张建[1] 王定标[1] Zhang Peng;Yao Qiufeng;Yang Yushen;Peng Xu;Zhang Jian;Wang Dingbiao(Engineering Research Center for Energy Saving Technology and Equipment of Thermal Energy System, Ministry of Education, School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, 450001, China;Zhejiang Chuangli Automotive Air Conditioner Co., Ltd., Longquan, 323700, China)

机构地区：[1]郑州大学机械与动力工程学院,热能系统节能技术与装备教育部工程研究中心,郑州450001 [2]浙江创立汽车空调有限公司,龙泉323700

出　　处：《制冷学报》2022年第3期87-93,共7页Journal of Refrigeration

基　　金：国家自然科学基金(21576245)资助项目。

摘　　要：针对CO_(2)热泵系统螺旋套管式气冷器,基于MATLAB建立了仿真模型,采用单因素分析方法,研究进水温度、CO_(2)压力和质量流量对气冷器换热量、耗散、损失、效率以及出水温度的影响。经实验验证,在进水温度为24.5~35.0℃、CO_(2)压力为8.4~10.7 MPa、CO_(2)质量流量为0.0326~0.0476 kg/s工况下,气冷器模型制热量与实验数据相比总体误差在±10%以内。模拟结果表明:相比进水温度和CO_(2)质量流量,CO_(2)压力对气冷器性能的影响更为显著,且存在最优压力。在进水温度为20℃、CO_(2)进口温度为90℃工况下,当CO_(2)压力为10 MPa时气冷器效率最高,当CO_(2)压力为11 MPa时气冷器换热量最大;当进水温度低于20℃时,CO_(2)压力为10.5 MPa时出水温度最高。For the spiral tube gas cooler in a CO_(2)heat pump system,a simulation model was established in MATLAB.The effects of the inlet water temperature,CO_(2)pressure,and mass flow rate of the gas cooler heat transfer,entransy dissipation,exergy loss,exergy efficiency,and outlet water temperature were studied using a single factor analysis method.Compared to the experimental data,the overall error of the model was within±10%when the inlet temperature was 24.5-35.0℃,the CO_(2)pressure was 8.4-10.7 MPa,and CO_(2)mass flow rate was 0.0326-0.0476 kg/s.Compared to the inlet water temperature and CO_(2)mass flow rate,CO_(2)pressure had considerable effects on the performance of the gas cooler,thereby causing the optimal pressure.At inlet water temperature of 20℃and inlet refrigerant temperature of 90℃,the exergy efficiency of the gas cooler reached the peak when CO_(2)pressure was 10 MPa,and the heat transfer rate of the gas cooler was the highest when CO_(2)pressure was 11 MPa.When the inlet temperature was lower than 20℃and the CO_(2)pressure was 10.5 MPa,the outlet water temperature was the highest.

关 键 词：CO_(2)热泵 气冷器 换热量 耗散 

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