3E Analysis and GA-Based Multi Objective Optimization of an Ejector-Flash Tank-Absorption Refrigeration System Fuelled by Solar Energy

Abstract

This paper proposes and investigates an improved ejector-absorption refrigeration system for providing the cooling load of an office building. Performance hourly modeling of the system is performed based on modeling the hourly required cooling load and hourly solar insolation rate on July 21 with maximum solar insolation. The results indicate that during the given day thermodynamic coefficient of performance (COP ) and th exergetic coefficient of performance (COP ) increase 150 and 300%, respectively. While, the product cost per exe exergy unit of the whole system (c ) decreases 90%. The results of thermodynamic and thermoeconomic Ptot analysis determine effective design parameters on COP , COP and c . Also, single and multiple objectives th exe Ptot optimizations are applied to maximize COPs and minimize c . According to the results, the single objective Ptot optimization for maximizing COPs increases COPs by about 1.1% and decreases c by about 7.4%. Moreover, Ptot single objective optimization for minimizing c results in 2.2 and 11.5% decrease in COPs and c , respectively. Ptot Ptot Finally, multiple objectives optimization for maximizing COPs and minimizing c simultaneously causes about Ptot 1.9% decline in COPs while c decreases 10.9%. Ptot