Performance analysis of a novel combined parabolic trough collector with ejector cooling system and thermoelectric generators

Abstract

The paper presents a simulation for the performance analysis of integrated systems including thermoelectric generators, parabolic trough solar collectors to generate electrical power and a cooling effect. The system's thermodynamic model is solved using TRNSYS and EES software. The experiments are carried out to evaluate the performance of the parabolic trough collector for Tunisian weather conditions. Hence, the experimental data are the input for the thermodynamic model to predict the actual system's performance. The effect of the main parameters such as the collector's inlet and outlet fluid temperatures, the useful energy gain, the turbine backpressure, and the evaporator's temperature on the system's performance was estimated. The results of the mathematical model were validated by existing published results and experimental data. The results showed that the system thermal efficiency of the new system increased by an average of 60% in comparison to that of the conventional system when the evaporator's temperature increased, and 55% when the exit turbine pressure increased. The produced electrical power by the TEG module was 37.3 W for one day in summer and 28.3, 16.6, and 22.4 W in fall, winter, and spring, respectively. The system coefficient of performance was found to increase with the increase of the parabolic trough collector's area.