Parametric analysis and optimization of a novel trigeneration system based on tubular solid oxide fuel cell

In this article, a new power, cooling and heating trigeneration system consisting of a hydrogen-fed SOFC (solid oxide fuel cell) - GT (gas turbine ), a HRSG, a GAX absorption refrigeration cycle and a HR has been studied from a parametric and optimization perspective. In contrast with most of the previous investigations, in which the HRSG is located at the downstream of GAX, in the present research, in order to control the wasted heat, HRSG is located at upstream of GAX. The electrochemical analysis is complete for the fuel cell and the cell temperature is computed for all the working conditions of the cell. Then, the parametric study of the hybrid system, the influences of current density, fuel utilization factor, compressor pressure ratio and air utilization factor on the performance of the system are investigated. The optimization of the system is performed in the method of the genetic algorithm to determine the optimal functional points. After optimization and exergoeconomic analysis, minimum SUCP, the exergy destruction cost rate and exergoeconomic factor for the overall system is equal to 277.2 $/GJ, 40.8 $/h and 27.8%, respectively. Therefore, the increase in the components' capital costs can improve the exergoeconomic performance of the system.