基于分离式热管换热器的非能动安全壳热量导出系统实验研究

摘要

Passive containment cooling system (PCS) is an important system for severe accident mitigation.Separated heat pipe is a good choice for PCS with high priority,which can transfer heat with high efficiency.The experiment research on PCS with separated heat pipe was introduced in this paper,including modeling and scaling of experiment facility,experiment system and experiment result.The heat transfer characteristic and maximum heat removal capacity of separated heat pipe in special conditions were analyzed.Finally,the feasibility of PCS with separated heat pipe was demonstrated.The results show that the heat exchange amount of unit hot end area for separated heat pipe is up to 61 kW,which has the potential to be applied to PCS.The heat transfer performance of the heat pipe decreases with the temperature difference between the hot and cold ends,and increases with the vacuum.%非能动安全壳冷却系统(PCS)是核电厂用以预防和缓解严重事故的重要系统,分离式热管换热器作为一种高效的热交换设备,是其优先设计选项之一.本文介绍了基于分离式热管换热器的PCS原理实验台架的比例设计方法、实验系统和实验结果,分析了热管换热器在特定工况下的换热特性及功率极限,并论证了基于分离式热管换热器的PCS的设计可行性.结果表明:分离式热管单位热端面积换热量可达61 kW,有应用于PCS的潜力;热管的换热性能随冷热端温差的降低而降低,随真空度的提高而升高.