Abstract

This study presents a multi-objective analysis and modeling of an improved solar absorption refrigeration system based on condenser and evaporator assembly components for optimal coefficient of performance cooling. The water vapor absorption refrigeration system using LiBr-H₂O working pair was investigated to enhance its design through comprehensive thermodynamic modeling. The analysis revealed that coefficient of performance values increase significantly with evaporator temperature, demonstrating an improvement from 0.40 to 0.80 (compared to baseline 0.708), representing an 11.5% enhancement in cooling capacity. The maximum-achievable coefficient of performance showed a corresponding increase from 1.0 to 1.80 against the baseline of 1.039, indicating a 42.3% improvement. Conversely, the multi-objective approach to condensation showed that coefficient of performance decreased by 38.7% as condenser temperature increased, with the coefficient of performance declining from 67.5% to a maximum of 68.2% at condenser temperatures ranging from 16 to 40°C. The thermal load analysis demonstrated that as evaporator temperature rises, the absorber thermal load decreases, consequently reducing the weak solution concentration. These findings provide valuable insights for optimizing solar absorption cooling systems and improving their practical implementation in sustainable Heating, Ventilation, and Air Conditioning applications.