摘要
为研究类菱形肋片流道印刷电路板换热器热工水力特性,采用数值模拟方法,以冷侧超临界二氧化碳(S-CO_(2))和热侧气态CO_(2)为工质,分析了冷侧进口温度313.15~353.15 K,热侧进口温度553.15~593.15 K,冷热侧热工水力特性的变化,比较了NACA0030翼型肋片流道和类菱形肋片流道的综合性能。结果表明:S-CO_(2)入口温度增大40.0 K,总换热量减小23.91%,冷、热侧压降分别增大29.95%、11.14%;气态CO_(2)温度增大40.0 K,总换热量增大16.40%,冷、热侧压降分别增大9.42%、7.43%,S-CO_(2)入口温度变化对热工水力特性的影响更明显;类菱形肋片流道印刷电路板换热器有着更小的流动阻力和较好的综合性能。该研究结果对间断型印刷电路板换热器设计有一定的参考意义。
To study the thermal hydraulic characteristics of the printed circuit heat exchanger with rhombic fin channels,variations in thermal hydraulic characteristics on the hot and cold sides were analyzed by numerical simulation,with cold side inlet temperature of 313.15~353.15 K and hot side inlet temperature of 553.15~593.15 K.The working medium on the cold side and the hot side were S-CO_(2) and gaseous CO_(2) respectively.The comprehensive performance was compared between NACA0030 airfoil fin channels and rhombic fin channels.The results show that when the inlet temperature of S-CO_(2) increases by 40 K,the total heat transfer decreases by 23.91%,and the pressure drop of hot and cold increases by 29.95%and 11.14%respectively.When the temperature of gaseous CO_(2) increases by 40 K,the total heat transfer increases by 16.40%,and the pressure drop of hot and cold increases by 9.42%and 7.43%respectively.The inlet temperature of S-CO_(2) has more obvious influences on the thermal hydraulic characteristics.The printed circuit heat exchanger with rhombic fin channels has less flow resistance and better comprehensive performance.The results have a certain reference significance for the design of printed circuit heat exchangers with discontinuous channels.
作者
吴家荣
李红智
杨玉
张一帆
杨乐
WU Jiarong;LI Hongzhi;YANG Yu;ZHANG Yifan;YANG Le(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)
出处
《热力发电》
CAS
CSCD
北大核心
2023年第11期20-28,共9页
Thermal Power Generation
基金
国家自然科学基金项目(U20B2035)
国家重点研发计划项目(2018YFB1501004)
陕西省创新能力支撑计划(2023-CX-TD-18)。
