CPL系统的非稳态数值模拟

Unsteady-state Numerical Simulation of a CPL (Capillary Pumped Loops) System

针对CPL系统给出了描述系统温度、压力和流量等物理量的一维动态模型 ,在蒸发器毛细芯中采用了非热平衡温度模型 ,模型考虑了毛细力对蒸发温度和速度的影响 ,模型还考虑了储液管中温度的波动对系统运行的影响 ,运用该模型重点分析了CPL系统的启动过程 ,分析了影响顺利启动的几个关键因素 。

A one-dimensional dynamic model was set up for a CPL (capillary pumped loops) system. The model can describe a whole variety of physical quantities, such as the system temperature, pressure and flow rate, etc. In an evaporator capillary core a non-thermal equilibrium temperature model is adopted. The model has taken into account the impact of capillary force on the evaporation temperature and speed, as well as the impact of temperature fluctuations in a liquid-storage tube on the system operation. The model was employed to undertake a focus-point analysis of the CPL system start-up process, analyzing several key factors believed to have an impact on the performance of a successful start-up. Numerical calculation results have been found to be in very good agreement with experimental ones.