The detrimental effect of mechanical vapor compression air conditioning system on the environment and their energy intensive nature are compelling the researchers to make the efforts to enhance the capability of solar thermal-based adsorption cooling system (STACS). In the current study, modelling of a STACS is performed under the weather condition of Delhi, India, in order to fulfill the thermal energy demand of a typical building. According to the cooling load of the building, 3 TR (Ton of Refrigeration) adsorption chiller has been considered. The performance parameter is considered as solar fraction (SF) for the system optimization. The performance of the STACS is found better for the major contributing parameters such as evacuated tube solar collector area and storage tank capacity for the specified mass flow rate of 100 kg/hr are 30 m2, and 600 L, respectively. Based on the analysis, the optimized system could achieve coefficient of performance (COP) of the STACS is 0.49.KeywordsSolar energyEvacuated tubular collectorVapor adsorptionTRNSYS