Evaluation of solar-assisted absorption refrigeration cycle by using a multi-ejector

Abstract

The theoretical analysis for the absorption cooling system of the multi-ejectors flash tank has been investigated. In this research, the analysis of the energy balance is conducted to predict the possibility of improvement in the thermal loads components of the absorption cooling system with multi-ejectors -flash tank. The computer program of simulation has been used to assess the single, double and triple ejectors for the absorption cooling system performance by utilizing a solution of the water ammonia as a working liquid, which operated under stable conditions. The results indicate that the cycle with three ejectors has the lower generator and evaporator thermal loads than the other cycles. It is also showed that the generator load for a cycle using double ejectors is higher than other cycles, while the evaporator thermal load is found permanently less than the basic and single cycle and slightly higher than the cycle which has three ejectors. As well as the improvement in overall COPs of the combined cycle using double ejectors under different operating conditions is higher than that of the other combined cycles. It was found that the total COPs for the double ejector cycle are higher by ratios (9.2% and 5%) at higher and lower operation conditions, respectively, than the combined triple ejectors’ cycle.