Received: 10 September 2016 – Accepted: 29 September 2016 – Published: 18 October 2016 Copyright © 2016 *Address reprint requests to G. Lavanya, P.G. Scholar, Department of Mechanical Engineering, J.N.T.U.A College of Engineering, Ananthapuramu-515001, Andhra Pradesh, India. E-mail: giriraju.lavanya@gmail.com ORIGINAL ARTICLE Cooling and Heating of Refrigerator Jacket by Using Peltier Effect G. Lavanya 1 , S. Venkanteshwarlu 2 , A. Nagaraju 3 , G. Prasanthi 4 1 P.G. Research Scholar, Department of Mechanical Engineering, J.N.T.U.A College of Engineering, Ananthapuramu-515001, Andhra Pradesh, India 2 Lecturer, Department of Mechanical Engineering, J.N.T.U.A College of Engineering, Ananthapuramu-515001, Andhra Pradesh, India 3 Lecturer, Department of Mechanical Engineering, J.N.T.U.A College of Engineering, Ananthapuramu-515001, Andhra Pradesh, India 4 Professor, Department of Mechanical Engineering, J.N.T.UA College of Engineering, Ananthapuramu-515001, Andhra Pradesh, India ABSTRACT This project outlines the implementation of photo voltaic driven cooling and heating system. Refrigerator jacket works according to the atmospheric conditions. If the atmosphere is cooler than the required condition, then it gives the amount of warmness to the human body, without causing any side effects and vice versa. Refrigerator jacket entirely depends upon the principle of “Peltier effect”. Refrigerator jacket simply uses electrons rather than refrigerants as a heat carrier. This cooling or heating system does not contain any moving parts like compressor or solution pumps and also it does not require any condenser, expansion valve, or absorber. So, its design is simple and easy to construct. In this project, the working model of jacket utilises the required thermo electric modules. The performance of this model is experimentally evaluated with copper cabinet. The present article explains about how Peltier cooler is used in jacket and its advantages over conventional cooling system. Refrigerator jacket reduces the use of convectional refrigeration system, therefore effect of skin cancer, ozone depletion potential, and global warming potential reduces. This jacket is compact in size and it is eco-friendly in nature. Because of all these reasons Peltier effect is used in refrigerator jacket. Function of jacket interface is to provide thermal effciency and comfort to user. Peltier cooling module is used to cool fuids stored in reservoir. Thermal resistance and cooling jacket size slightly decrease the Peltier cooling capacity on human. Int. Mech. Eng.  DOI: http://dx.doi.org/10.20936/IMEG/160104 INTRODUCTION Thermoelectric cooling is a method used for cooling purpose in various applications. It has good impact over conventional cooling system. Thermoelectric coolers are compact in size, no coolant is used in the system, no frictional element present in system, and weight of system is very less. The changing state between cooling device and heating device is easily controlled. Depending upon the requirement, thermoelectric coolers are used in various applications such as cooling of electronic equipment, thermoelectric refrigeration, space cooling with use of PCM, portable active solar still etc. Thermoelectric coolers are heat pumps that operate on Peltier effect. Research suggests that heating or cooling effect occurs when electric current passes through two conductors. When a voltage is applied to two ends of dissimilar material it will create difference. The temperature difference causes heat to fow according to Peltier effect. A basic thermoelectric cooler will consist of semiconductor elements (p-type & n-type) that work as two dissimilar conductors arranged in specifc order. The layer of elements is soldered between two ceramics plates, placed electrically in series structure and thermally in parallel structure. decrease at that junction , resulting the absorption of heat from the surrounding. The heat is carried out through the transportation of electron and it will move from high state to low state. The pumping capacity of a cooler is directly proportional to the number of pairs of ‘n’ and ‘p’ type (couples). The ‘n’ and ‘p’ type semiconductor, usually Bismuth Telluride, is the most used material to achieve the Peltier effect because they are used for carrying out the heat. They also control the charge carrier type in the system. THERMOELECTRIC COOLER Basics of Thermoelectric Cooler Thermoelectric refrigeration system is based upon the principle of thermoelectric effect. This effect is based on the following law: Seebeck effect When the two junctions of a thermocouple are maintained at distance, then the difference between the junctions is called KEYWORDS: thermoelectric module, heat sink, jacket, principle of Peltier effect