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An experimental investigation on design of a vapour absorption system using LiBr-H2Ofor high grade heat recovery in thermal cooling system for process heat applications has been conducted. A 1.5 kW cooling capacityof the LiBr-H2O vapour absorption system has beend esigned and tested under various operating conditions. Generator temperature, absorber tem-perature, condenser temperature and evaporator temperature have been varied and perfor-mance of LiBr-H2O vapour absorption system has been analysed. Experimental results are presented in terms of COP and circulation ratio. Further, to validate the results thermody-namic model is developed using first law of thermodynamics and simulate in Engineering Equation Solver. The COP and the circulation ratio estimated through simulationsand exper-iments have been in good agreement with ±5% standard deviation. Further, this this research work is beneficial for dairy industries in process heat applications and realizing the impor-tance of the need for energy conservation in dairy industries.

Several investigations have emphasized process parameters of single-effect v apour absorption system; yet, the influence of process parameters on thermodynamic performance of the absorption system has not been focussed for the best performance conditions. Several process parameters such as absorber, generator, evaporator, and condenser temperatures influence an absorption refrigeration system’s exergetic and energetic performance. In the present study, the design of experiments has been used for the optimization of process parameters. A 1.5 kW cooling capacity of the LiBr-H2O absorption system has been developed and tested under various operating conditions. Performance characteristics such as in COP and heat dissipated by the condenser (Qc) of the ARS system have been studied at different ranges of operating parameters. For the process parameter optimization, a central composite design under Response Surface Methodology has been used. The m aximum COP and Qc have been obtained as 0.827 and 2488.79, respectively at optimum values of generator temperature (Tg) = 95.1 oC, condenser temperature (Tc) = 45.3 oC, absorber temperature (Ta) = 28.4 oC and evaporator temperature (Te) =15 oC. The optimum conditions obtained by the design of experiments have been validated through experiments on the ARS system, and experiments have been conducted at closer conditions of the optimized values of the operating parameters and found the maximum COP and Qc as 0.926 and 2518.01, respectively. The results of this paper have been very useful in designing a better vapour absorption system.