砂利蓄熱システムの温度成層に関する基礎研究

抄録

In order to reduce the power generation of the CSP (concentrated solar power) plants, an economical and technical solution in the heat storage is a key point. In the previous study, an TES (thermal energy storage) system which using air as HTF (heat transfer fluid) and stone as the storage material have been developed. This paper describes the CFD study on a TES system with stone using high-temperature air as HTF which hybridized with CL-CSP (Cross Liner-CSP). The numerical simulation is performed using commercial CFD software ANSYS Fluent using a pilot-scale TES model. The influencing factors which affect the thermal stratification, such as the porosity and mass flow rate, are taken into consideration. Furthermore, the thermocline thickness is discussed for the CFD simulation result to evaluate the performance of charging and discharging of TES tank.