www.ijraset.com Volume 3 Issue X, October 2015 IC Value: 13.98 ISSN: 2321-9653 International Journal for Research in Applied Science & Engineering Technology (IJRASET) © IJRASET 2015: All Rights are Reserved 255 Design and Analysis of Solar-Powered Refrigeration System Using Parabolic Collector Amit Kumar 1 , S.B.Barve 2 , Nilesh T. Dhokane 3 1,2,3 Department of Mechanical Engineering, MITCOE, Pune University Abstract— Energy consumption increases very rapidly as the world developing. The ever increasing energy consumption world- wide makes it urgent to find new ways to use the energy resources in a more efficient and rational way. Solar energy is currently a subject of great interest, and refrigeration is a particularly attractive .Thus, systems that have the ability to harness solar energy, as the absorption devices, present themselves as interesting alternatives in an intelligent energy management. The objective is to establish a fundamental basis for further research and development within the field of solar cooling. This paper presents simple absorption refrigeration system using Li-Br / H 2 O as a working pair. The Li-Br aqueous solution based absorption cycle consists of four stages: generation, condensation, evaporation and absorption with ideally no moving part. The heat input to the absorption system generator is provided by parabolic dish collectors that are coupled to a generator tank. Results and performance of this system and the effects of the refrigeration load inlet temperature on the coefficient of performance, COP of the system are presented. Keywords— Refrigeration, Absorption System, Lithium-Bromide, Solar Collector I. INTRODUCTION Everywhere in the world, refrigeration is a major energy user. In poor areas, “off grid” refrigeration is critically important need. Due to increase in concentration of greenhouse gases and climate changes, the need of renewable energy sources is greater than ever Both of these consideration point the way towards the refrigeration using renewable energy, as part of a sustainable way of life. . For a refrigeration system that is designed using no energy or minimal amount of energy, absorption refrigeration system is a good solution. Among various technologies, absorption refrigeration has been most frequently adopted for solar cooling. It requires very low or no electrical input and for the same cooling capacity, the physical dimensions of an absorption refrigeration system are usually smaller than that of an adsorption refrigeration system due to the high heat and mass transfer coefficient of the absorbent. Energy supply to refrigeration and air-conditioning systems constitutes a significant role in the world. The International Institute of Refrigeration (IIR) has estimated that approximately of 15 % electricity produced worldwide is used for refrigeration and air-conditioning. Absorption refrigeration produces air cooling with the use of solar energy, thus electricity has been conserved. II. SOLAR ABSORPTION REFRIGERATION SYSTEM Vapour absorption system is one of the oldest methods of producing refrigeration. The idea of vapour absorption system was developed by Michel Faraday in 1824, while performing some set of experiments to liquefy gases. A refrigeration cycle is operated with the condenser, expansion valve, and evaporator if low pressure vapour from the evaporator can be transformed into high- pressure vapour and delivered to the condenser. [3]The vapour compression system uses a compressor for this task. The absorption system first absorbs the low pressure vapour in an appropriate absorbing liquid. Embodied in the absorption process is the conversion of vapour into liquid, and since the process is akin to condensation, heat must be rejected during the process. The next step is to elevate the pressure of the liquid with a pump, and the final step releases the vapour from the absorbing liquid by adding heat. In a water-lithium bromide vapour absorption refrigeration system, water is used as the refrigerant while lithium bromide (Li Br) is used as the absorbent. In the absorber, the lithium bromide absorbs the water refrigerant, creating a solution of water and lithium bromide. Lithium bromide has great affinity for water vapour, however, when the water-lithium bromide solution is formed, they are not completely soluble with each other under all the operating conditions of the absorption refrigeration system. Because of this, the designer must take care that such conditions would not be created where crystallization and precipitation of the lithium bromide would occur. The capacity of any absorption refrigeration system depends on the ability of the absorbent to absorb the refrigerant, which in turn depends on the concentration of the absorbent. To increase the capacity of the system, the concentration of absorbent