Energy analysis of lithium bromide-water and lithium chloride-water based single effect vapour absorption refrigeration system: A comparison study

Abstract

The present research article discussed; a detailed energy analysis for single effect vapour absorption refrigeration system using two working pairs Lithium bromide-water (LiBr–H2O) and Lithium chloride-water (LiCl–H2O) under different operating climate conditions. The performance parameters of the both the systems like coefficient of performance (COP), solution concentration, heat load at different components and optimum operating generator temperature have been investigated for both the systems. The capacity of the systems is fixed as 300 kW. The present work has been simulated for the evaporator temperatures of 5, 10 and 15 °C while the condenser temperatures of 25, 30 and 35 °C. Result shows, the maximum COP of LiBr–H2O system comes out to be in the range of 0.741–0.902, whereas in case of LiCl–H2O system it is to be in the range of 0.809–0.926. The minimum load at the generator for LiBr–H2O system is 382.573 kW, while for LiCl–H2O as 370.787 kW. Comparison shows that the LiCl–H2O system has better COP and minimum generator load as compared to LiBr–H2O system, especially at lower evaporator temperatures. The optimum operating generator temperature has been observed 54.56 °C for LiBr–H2O system and 56.25 °C for LiCl–H2O system.

Keywords

• COP
• LiBr–H2O
• LiCl–H2O
• Optimization
• Solution concentration
• Generator temperature