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Demand of hybrid vehicle increases more and more due to raise in fossils fuel prices. Automotive OEM’s of worldwide invest their potential in developing automobiles with higher fuel efficiency, light weight, comfortable and low cost as possible without negotiation in quality and safety. Air conditioner systems in buses utilizes 30% of power from engines for functioning of its components which increases the fuel consumption and decreases effective performance. In this project, Organic phase change material (PCM) paraffin 14-carbon with blend of 1.0 %wt of copper oxide (CuO)/titanium oxide (TiO2) nanoparticles dispersed fluid is used to store cooling energy in form of latent thermal heat. This composite material is filled in Aluminium shell of thickness 3mm and fixed in direct contact with refrigerant cycle. The newly developed PCM sample is subjected to differential scanning calorimetry (DSC) in order to determine phase change temperature and latent heats.