International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 08 | Aug-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 731 Performance measurement of Window Air conditioning system by introducing Sub-cooling effect by water spray S. S. Pathak 1 , P. C. Prajapati 2 , Y. R. Patel 3 , Y. R. Gandhi 4 , Dr. K.V. Modi 5 1,2,3,4 B. E. Students, Department of Mechanical Engineering, Government Engineering College, Valsad, Gujarat, India 5 Associate professor, Department of Mechanical Engineering, Government Engineering College, Valsad, Gujarat, India Abstract-In recent era, energy crisis is the main obstacle for the growth of the nation. To meet the requirement of electricity, there are two ways either generation of more electricity or saving electricity. Here, saving in electrical energy option has been adopted for the window Air-conditioner which can be possible by increasing the C.O.P. by introducing sub-cooling effect on condenser. The sub-cooling effect will be produced by using water sprinkled (natural) condenser and performance will be measured in terms of C.O.P., refrigerating effect and power consumption. The comparative study of air cooled condenser Air conditioning system and water cooled condenser Air conditioning system has been carried out. Key words: Energy crisis, Water cooled condenser, Sub- cooling, Sprinkle system, Air-conditioning. 1. INTRODUCTION Window air-conditioner is a common household appliance which consists of two units, inside unit and outside unit as shown in figure-1. Inside unit consists of heat exchanger/evaporator which absorbs heat from the confined place to be cool and a blower which blows cool air and maintains the air flow or motion in the place to be cooled. Outside unit consists of compressor, heat exchanger/condenser and a fan. Basically, window air conditioning system consists of four basic components: Compressor, Condenser, Expansion device (Capillary) and Evaporator. Window air conditioner works on vapour compression refrigeration (VCR) cycle as shown in figure-2. From this figure, COP of Air-conditioning system can be found out. C.O.P= Desired effect / input or work done C.O.P= Heat removed/ work done (compressor work) = (h1-h4) / (h2-h1) Fig.1: Window Air conditioner (PC: https://upload.wikimedia.org/wikipedia/commons/thu mb/f/f2/Air_conditioning_unit-en.svg/1157px- Air_conditioning_unit-en.svg.png) Fig.2: T-S diagram of Vapour compression cycle