哈尔滨工程大学学报2024，Vol.45Issue(3)：450-458,9.DOI:10.11990/jheu.202205071
圆管内氦氙混合气体与超临界二氧化碳换热特性对比分析
Comparative analysis of heat transfer characteristics between helium-xenon mixture and supercritical carbon dioxide in a circular tube
摘要
Abstract
The miniaturization and high compactness of reactor systems are the research focus of multipurpose ener-gy supply on land.However,energy conversion with direct thermal-dynamic cycles poses extremely high require-ments for the choice of coolants.In this work,the heat transfer characteristics in a circular tube are calculated by numerical simulation method to compare the physical properties of two coolants and analyze the effects of different heating power,inlet velocity,and inlet temperature on the coolant heat transfer coefficient,thus clarifying the suit-ability of working fluids for helium-xenon(He-Xe)gas mixtures and supercritical carbon dioxide(S-CO2).In this paper,an empirical model of heat transfer in a circular tube filled with two coolants is proposed.The results show that the convective heat transfer coefficient is relatively high when the heating power of the reactor exceeds 100 kW/m2 and the inlet flow rate is greater than 10 m/s.Furthermore,there exists a maximum when the inlet temperature of the helium-xenon mixture is about 1 000～1 200 K,and the supercritical carbon dioxide is about 550～600 K.Finally,in the high Reynolds number region(Re>104),the D-B type fitting relationship of the two coolants is in good agreement with the calculated values.The calculation in this paper can provide data and model basis for the development of new reactors.关键词
小型反应堆/氦氙混合气体/超临界二氧化碳/圆管通道/数值模拟/模型修正/换热特性/安全特性Key words
small reactor/helium-xenon mixture/supercritical carbon dioxide/circular tube/numerical simula-tion/model modification/heat transfer characteristics/safety features分类
能源科技引用本文复制引用
宁可为,刘凯,孙汝雷,赵富龙,游尔胜,余霖,谭思超..圆管内氦氙混合气体与超临界二氧化碳换热特性对比分析[J].哈尔滨工程大学学报,2024,45(3):450-458,9.基金项目
核反应堆系统设计技术重点实验室基金项目(KFKT-05-FW) （KFKT-05-FW）
工业和信息化部重点实验室开放基金项目(GXB202202). （GXB202202）
