This book consists of a brief background for the electric chiller, Energy Storage (ES), Thermal energy storage (TES) system, and life cycle cost (LCC) analysis. The problem statement has been stated to describe the reason after highlighting the research gaps and the objectives have been listed to focus on the target and outcomes expected from this research. a probabilistic LCC has been employed to investigate the performance of TSS being constituted by multiple electric chillers and TES tanks located at the GDC plant, UTP. The mathematical tool MATLAB was used to aid the calculations.