First Law Optimization and Review of Double and Triple-Effect Parallel Flow Vapor Absorption Refrigeration Systems

Parallel flow double and triple-effect vapor absorption cooling systems (VACS) are trying to meet the challenges of compression due their better performance. Therefore, present study deals with review, thermodynamic analysis, optimization operating parameters for both VACS. Lithium bromide water was selected as working fluid, while liquified petroleum gas (LPG) compressed natural (CNG) were taken source energy drive Detailed First Law i.e., coefficient performance (COP), examined along (such salt concentration generators temperature at different pressure levels) volume rate gases. Optimization carried out maximum COP VACS using an iterative technique. Our results show that system approximately 32% higher than effect, 15–20% less consumption gases (LPG CNG) observed. The most optimum stage operation reached Te = 4 °C Tc Ta 30 °C, Tg 180 Tc4 104 Tc3 66 Z1 0.5, Z2 0.45.