(428g) Optimal Design and Operation of an Organic Rankine Cycle (ORC) System Driven By Solar Energy with Sensible Thermal Energy Storage
AIChE Annual Meeting
Wednesday, November 10, 2021 - 9:24am to 9:45am
In this study, we investigate the optimal operation of an ORC system driven by solar energy. The main objective is to develop a model describing an organic Rankine cycle driven by solar energy with constant power output. A sensible energy storage system is configured to overcome the intermittency of solar energy. A circulating fluid that connects the solar collector and the ORC system plays a critical role in this system. The mass flow rate of the circulating fluid determines both the temperature of the circulating fluid and the amount of heat absorbed from the solar collector. Among the concentrating solar collectors, the parabolic trough collector (PTC) has reached the highest level of commercial maturity and accounts for the largest share of the current concentrated solar power market. A simulation-based optimization model is developed in this work. Process simulation of the ORC is performed in Aspen HYSYS, and the mathematical model of the energy storage system and the parabolic trough collector is developed in Matlab. The optimal operation of the system including the mass flow rate of the circulating fluid, operating conditions of the ORC, the inlet and outlet temperature of the circulating fluid are determined jointly based on this model. The control strategy of the system can be determined based on the results of this work. The efficiency of the ORC system can be maximized with the proposed system configuration.