槽式光热电站启动过程的热力学分析

Daily start-up is the feature of concentrated solar power (CSP) plant resulting from the intermittency of solar energy. Therefore, the electricity production of CSPs is reduced due to the energy loss during the start-up process. To obtain the component and cause of the start-up energy loss, the dynamic simulation and energy analysis of CSPs during the start-up process were carried out. Results show that the energy storage, energy loss, and electricity production during the CSP start-up process account for 40.59%, 52.89%, and 6.51% of the total input energy, respectively. Energy storages of thermal energy storage and solar field are the major ones with 80.60% and 14.88% of the total energy storage, respectively. The collector optical energy loss, turbine cold source loss, and receiver heat loss are major ones with 66.12%, 18.58%, and 8.76% of the total energy loss, respectively. Receiver heat loss, bypass energy loss and collector defocused loss have the energy-saving potential, accounting for 15.31% of total energy loss.