International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 662 A REVIEW ON SOLAR OPERATED MILK PASTEURIZATION SYSTEM C V Papade 1 , S G Ghodke 2 1,2 Department of Mechanical Engineering, N. K. Orchid College of Engineering & Technology Solapur, Dr. Babasaheb Ambedkar Technological University, Lonere, Raigad, Maharashtra- 402103, India --------------------------------------------------------------------***------------------------------------------------------------------- Abstract - The analysis and performance testing of milk pasteurization system that is based on the solar energy as a thermal source for pasteurizing the milk . This is adapted for using at remote areas and villages, communities where the small quantities of milk delivered by individual producers who are deprived of the availability of gas and electricity. A solar parabolic dish collector is used for heating milk and PV solar plates setup used for cooling purpose of milk. Milk pasteurization is a process which involves heating of milk to a temperature that kills diseases causing microorganisms and substantially reduces the level of spoilage organisms. In dairy the pasteurization of milk is very very important process. All milk produced at a processor and intended for consumption must be pasteurized, legally requiring it to be heated to at least 73°C then cooling it to 4°C to ensure any harmful bacteria are to be destroyed. For this process, heating of milk is necessary and it done by diesel energy or electric energy. The sources of this energy are very limited and currently India is facing with shortage of about 21% of electric energy. Hence solar energy is good option for this process. The changes in intensity of solar radiation had a direct impact on solar milk pasteurizer. Keywords:-Solar Energy, Chilling Plant, Milk Pasteurization, Micro-organisms, Heater. 1.INTRODUCTION The term 'solar energy' refers to energy generated from capturing the sunlight and heat from the Sun. Technology has developed several ways to utilize this abundant resource. It is considered as a green technology because of it does not emit greenhouse gases. Solar energy is abundantly available on earth and it has been utilized since long time for both as electricity and as a source of heat. The usage of this renewable energy sources can reduces the pollutant emissions into the atmosphere. Solar energy, especially when used efficiently, can play a crucial role in developing and developed nations alike. Solar energy has been used since pre-historic times, but in a most primitive manner. Before 1970, some researches and development works were carried out in a few countries to exploit solar energy more efficiently, but most of this work remained mainly academic. After the dramatically rising in oil prices in the 1970s most of the countries began to formulate and extensive research and development programs to exploit solar energy. Whenever we hang out our clothes to dry in the sun, we use the energy of the sun. In the same way solar panels absorb the energy of the sun to provide heat to the system. Solar energy is the energy from the sun in the form of radiated heat and light. It drives the climate and supports life on earth. Solar energy is freely available source of energy. It does not belong to anybody. It is the most important non-conventional source of energy because it does not pollute environment and it helps in reducing the greenhouse effect. Solar energy is the clean and natural source of energy and it is available in huge amount. The development of inexhaustible, affordable and clean solar energy technologies will have been huge longer-term benefits. It will increase countries energy security through reliance on an inexhaustible, indigenous and mostly import-independent resource, enhance sustainability, reduce pollution, lower the costs of mitigating, reduce global warming and keep fossil fuel prices lower than otherwise. Solar energy is the radiation from the Sun capable of producing heat, causing chemical reactions, or generating electricity. If suitably harnessed, solar energy on the earth has the potential to satisfy all future energy needs to entire earth. India is a country in which solar energy is available in massive amount and also favorable place for the use of that solar energy. The consumption of non-renewable sources like oil, gas, wood and coal are increasing at higher rate. The time has finally come to look after some other renewable sources of energy like solar, wind and geothermal energy. Many countries have started utilizing solar energy can cover mostly their demands but they still have to go a long way to exploit this renewable energy to fulfill their daily needs. Some people create a completely wrong picture of the relevance, requirement and importance of solar energy for India. They usually focus on the cost and affordability in a short-sighted way and ignore the larger issues of energy availability and environmental health. India has a massive