This study investigates numerically the sunrise and sunset transient temperature model that is developed for modeling sunlightâ€™s temperature in designing latent heat thermal energy storage system (LHTESS), to close carbon cycles. It was used as a model for the threedimensional conjugate phase change material (PCM) melting procedure in the thermal storage of a 500K-rated concentrated solar power (CSP) plant using computational fluid dynamics (CFD) code. Air is the heat transfer fluid (HTF). Two transient solar temperature models and an isothermal model were studied and compared. The reduction in the expected storage time and increased energy storage greatly improved the system’s efficiency. The numerical model results were substantiated by experimental evidence from the open literature.
Keywords CSP, CFD, PCM, LHTESS, Heat transfer, Sunrise and Sunset temperature model