槽式光热电站连续运行模拟

A modelling study on 100 MW parabolic trough solar thermal power plant is conducted using THERMOFLEX. The simulation of continuous operation process is proposed during summer and winter solstice. In this simulation, the operation parameters, such as HTF flow rate, temperature, dispatch proportion, defocus percentage and hot tank level are adjusted based on the variation of measured DNI value and meteorological condition. The temperature, pressure and mass flow rate of the main steam remain stable to keep the plant steady running. The performance parameters and fluid working parameters are calculated. The calculation results show that the aperture DNI varies greatly between summer solstice and winter solstice. The cosine effect is the main factor lead to the aperture DNI decreasing at the winter solstice midday. The operation and performance parameters between the two typical days are obviously different.