直通道PCHE内S-CO2与铅铋合金耦合换热特性数值分析
A numerical analysis of the S-CO2 coupled with lead-bismuth eutectic heat transfer characteristics in straight channel PCHE
刘凯 1彭军 2赵富龙 1董显敏 1田瑞峰 1谭思超1
作者信息
- 1. 哈尔滨工程大学 核科学与技术学院,黑龙江 哈尔滨 150001;黑龙江省核动力装置性能与设备重点实验室,黑龙江 哈尔滨 150001
- 2. 海军装备部, 北京 100841
- 折叠
摘要
针对超临界二氧化碳(S-CO2)与液态铅铋合金在印刷电路板换热器内耦合换热问题,本文建立了"1 对 2型"直通道印刷电路板换热器换热单元三维模型.采用数值模拟方法对S-CO2 与液态铅铋合金耦合换热特性进行了研究.结果表明:冷侧S-CO2 对流换热热阻远大于热侧液态铅铋合金热阻,即印刷电路板换热器整体换热更受制于S-CO2 的影响,且S-CO2 侧的换热强度决定了整体换热的下限.改变S-CO2 侧入口质量流速比改变液态铅铋合金侧入口质量流速对印刷电路板换热器换热器单元功率影响程度更大.S-CO2 侧入口质量流速每增加 1 kg/s,换热功率增加335.77 kW.本文研究结果可为后续液态铅铋合金与S-CO2 耦合换热研究和印刷电路板换热器设计提供参考.
Abstract
The mechanism of heat transfer between supercritical carbon dioxide(S-CO2)and liquid lead-bismuth alloy(LBE)coupled in a printed circuit heat exchanger(PCHE)is complex,and little research has been conduc-ted on this topic.Therefore,this paper develops a three-dimensional model of a"1 correspond 2"type straight channel PCHE heat transfer unit.A numerical simulation method is used to investigate the coupled heat transfer characteristics of S-CO2 and LBE.The results show that the S-CO2 convective heat transfer thermal resistance on the cold side is greater than the LBE thermal resistance on the hot side.This means that the overall heat transfer characteristics of PCHE are mainly enslaved to the effect of S-CO2,and the heat transfer strength of the S-CO2 side determines the lower limit of the overall heat transfer characteristics.Additionally,varying the inlet mass flow rate on the S-CO2 side has a greater effect on the power of the PCHE heat exchanger unit than varying the inlet mass flow rate on the LBE side.For each 1 kg/s increase in the S-CO2 inlet mass flow rate,the heat transfer power in-creases by 335.77 kW.These results provide a reference for subsequent studies on coupled heat transfer between LBE and S-CO2 and the design of PCHEs.
关键词
超临界CO2/铅铋合金/印刷电路板/换热器/直通道/耦合换热特性/超临界流体/数值分析Key words
supercritical carbon dioxide(S-CO2)/lead-bismuth eutectic/printed circuit board/heat exchanger/straight channel/coupled heat transfer characteristics/supercritical fluid/numerical analysis引用本文复制引用
基金项目
国家级青年人才项目(2021QNRC001)
国家自然科学基金(U22B2093)
出版年
2023
国家科技期刊平台
NSTL
万方数据