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基于能量平衡、压力平衡以及质量守恒,建立了氮工质深冷环路热管(CLHP)的稳态数学模型,模拟结果同实验数据具有良好的一致性.应用该模型对CLHP的稳态运行特性进行了理论分析,考察了寄生热载荷、次蒸发器功率等对CLHP运行性能的影响,并得出如下结论:同常温环路热管相比,CLHP的传热能力明显减小;当主蒸发器热载荷较小时,寄生热载荷以及反重力高度的存在使CLHP的稳态运行温度明显升高,而通过对次蒸发器施加功率可显著改善CLHP的工作性能;CLHP最高运行温度/压力随储气室容积的增大而减小,相应的,其最大传热能力将受到限制.
Based on energy balance, pressure balance and conservation of mass, a steady-state mathematical model of cryogenic cycle heat pipe (CLHP) for nitrogen working fluid was established. The simulation results agree well with the experimental data. The steady- The effects of parasitic heat load and secondary evaporator power on the operation performance of CLHP are investigated. The conclusions are drawn as follows: The heat transfer capacity of CLHP is obviously reduced compared with that of normal temperature loop heat pipe; when the main evaporator heat When the load is small, the steady state operating temperature of CLHP obviously increases due to the existence of parasitic heat load and anti-gravity height, while the performance of CLHP can be significantly improved by applying power to the secondary evaporator. The maximum CLHP operating temperature / The volume increases and decreases, and accordingly, its maximum heat transfer capacity will be limited.