Dynamic Simulation of Closed Brayton Cycle Solar Thermal Power System

The work process of Closed Brayton Cycle Solar Thermal Power System is a dynamic process and the periodical change of eclipse and sun period will influence the system performance. In order to study the dynamic characteristic of the system, a dynamic model is proposed using lumped method and the dynamic simulations of space solar-dynamic power system with the electrical output power of 10 kW are performed. The simulation results indicated that the variations of temperature of phase change material and electrical output power with time are very small when the phase change materials are in the state of two phase, but the variations are bigger when the Phase-change materials are in the state of single phase. In order to gain a steady electrical output power, phase change material must be in the state of two-phase by choosing proper parameters of solar thermal power system.