This book covers the performance analysis of solar thermal cooling system for a computer lab situated in Government Engineering College Bharatpur (Rajasthan, India) using Flat Plate Collector, Evacuated Tube Collector and Compound Parabolic Collector. The computer lab has the floor and roof area 198.55 m2. The peak cooling load is calculated and it is 34.940Kw, accordingly 10TR vapor absorption cooling system was adopted. The 10 TR vapour absorption system was operated by a field of collector area varying from 80-120 m2. The other parameters like hot storage tank, cold storage tank, pump, cooling tower etc are used. The simulation was carried out on TRANSOL Program for Bharatpur, city situated in east of Rajasthan, India. Sensitivity analysis shows that in coming future the as the total investment cost decreases and electricity prices increases, the payback period came down. If the total investment fall down to its 50% and electric prices are hike 50% than the payback period camedown within the system life.