International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1875 Comfort Cooling Application Using Fixed Focus Solar Parabolic Dish Concentrator Integrated with Double Effect Vapor Absorption Machine Anagha Pathak 1* , Kiran Deshpande 1 , Niranjan Kurhe 1 , Pravin Baste 1 , Sandesh Jadkar 2 1 School of Energy Studies, Savitribai Phule Pune University, Pune 411 007 (India) 2 Department of Physics, Savitribai Phule Pune University, Pune 411 007 (India) ---------------------------------------------------------------------***------------------------------------------------------------------- Abstract - Comfort cooling using solar energy can be done using two types of technologies viz; vapor compression machines (VCM) operating on electricity and vapor absorption machine (VAM) operating on thermal heat. Both technologies are used in industrial process and commercial establishments. In present article, the utilization of solar thermal energy for cooling purpose in commercial and industrial establishments has been discussed. A complete case study based on integration of solar thermal energy system for cooling with the existing system has been studied along with its performance evaluation. Among the various available solar thermal technologies, Scheffler dish technology has been used for generation of heat required for operating VAM. The existing electrical VCM system acts as a backup during non-sunny hours. The Scheffler dish technology can generate required heat for double effect lithium-Bromide (Li-Br) vapor absorption machine. The size of solar installation and VAM capacity can be decided depending on the available area and the required cooling load. The annual saving of approximately 1,20,000 units of electricity and reduction of 113 Metric Tons of CO 2 emission was achieved using 320 m 2 of Scheffler dish collector area with a payback period of 6-7 years. The present case study revealed that the solar thermal cooling based vapor absorption machine can be seamlessly integrated with the existing electrical chillers for comfort cooling applications. Key Words: Parabolic dish concentrator, Scheffler dish, Solar cooling technologies, Solar thermal energy, Vapour absorption machine. 1. INTRODUCTION Comfort cooling consumes about 30 % of electricity in India which is produced largely from fossil fuels. Solar thermal technology can be used for industrial process heat application as well as it can meet the cooling demands at various sectors. Cooling is used for various applications like space cooling or comfort cooling, industrial process cooling, cold storages, in public health centres for vaccine storage, deep freezing etc. The increased use of refrigeration and air conditioning has created huge demand for electricity and is expected to go up substantially due to global warming and improved lifestyle in India. Most of the industrial and commercial installations make use of central chillers to meet their cooling demands. These central chillers use either electricity or thermal heat as energy source. The use of solar thermal technology in vapour absorption machines can minimize the use of electricity and reduce excessive use of fossil fuels. India is blessed with abundant solar radiation throughout the year at most of its parts. The requirement of cooling is maximum during the day time when the solar energy is also available at its peak. A variety of cooling technologies and solar collector technologies have been developed which can be integrated with the existing conventional thermal driven cooling systems. Solar cooling technologies such as vapor compression machines (VCMs), vapor absorption machines (VAMs), vapor jet or ejector cooling system, open cycle desiccant cooling system etc. are commercially available. The electricity driven VCM is widely used. However, in India electricity is either not available all the time or it is very expensive and are forced to use diesel to run DG sets for running the ACs. The VAM can be operated on heat generated by solar thermal technology [1]. The type of solar thermal technology can be chosen depending on the temperature requirement of VAM. The VAM can be single effect, double effect or triple effect. The former require lowest temperature while later is most efficient. Single effect VAM requires a temperature of  80 0 C. For double and triple effect VAM, the temperature requirement is  140 0 C and 180 0 C, respectively. The electricity driven VCM is widely used. However, VAM operating on solar thermal technologies are finding good acceptance in the country [2]. The VCM operating on electricity generated by solar PV technology can be an alternative. However, in India, the solar thermal based cooling systems are most appropriate and a feasible solution for cooling applications. Solar thermal systems based on concentrating solar technologies (CSTs) are more suitable especially in industrial and commercial installations compared to flat plate collector (FPC) based systems. The CST can provide heat at high temperature to operate VAMs at higher efficiency. With this motivation we have carried out a complete performance and commercial evaluation of CST based cooling system in an industrial establishment in northern India. Herein, Scheffler dish based technology has been used for generation of heat required for operation of double effect Li-Br vapor absorption machine. The observed performance and commercial evaluation analysis revealed that the VAM integrated with Scheffler dish based CST can be a viable solution to obtain industrial solar thermal cooling in India to reduce the use of fossil fuels and to save the electricity. 1.1 Solar Cooling Technologies Various solar cooling technologies are commercially available which include vapor compression machines