Unsteady-state numerical simulation of a CPL (capillary pumped loops) system

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.