A Comprehensive Thermodynamic Analysis of a Solar-Assisted Multigeneration System with Partial Cooling-Reheating sCO₂ Brayton Cycle

This work presents the thermodynamic analysis of an integrated multigeneration system utilizing solar energy that simultaneously generates electricity, refrigeration, and hydrogen. The system consists of a solar tower, partial cooling-reheating sCO2 Brayton cycle, organic Rankine cycle (ORC) incorporated with a vapor compression refrigeration cycle (VCRC), proton exchange membrane (PEM) electrolyzer, and thermoelectric generators (TEG). The system's performance is determined regarding energy and exergy efficiency in relation to varying levels of solar radiation. The findings show that the overall net power output and system efficiency are higher with greater solar radiation, with a maximum of 5492.79 kW of power output and 36.95% energy efficiency. However, the increase in solar radiation also leads to more irreversibility, and the overall exergy destruction is 8301.289 kW. Hydrogen production and cooling performance of the system also rise significantly with increasing solar radiation, which indicates the effectiveness of the multigeneration approach.