International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
Design and Development of Small Scale VAR System by Using Exhaust Gas of IC Engine Svadas Hemang Jayeshbhai1, Patel Krutangkumar Sureshbhai2, Trivedi Meet Paresh3, Patel Meet Mukeshbhai4 1Student,
Indus University, Ahmedabad, Gujarat. Gujarat Technological University, Ahmedabad, Gujarat. 3Student, Gujarat Technological University, Ahmedabad, Gujarat. 4Student, Indus University, Ahmedabad, Gujarat. ---------------------------------------------------------------------***--------------------------------------------------------------------2Student,
Abstract - Vehicles uses the technology of vapor
used refrigerants due its high latent heat of vaporization and a small specific volume of liquid refrigerant. The combination of aqua-ammonia is better than the fluorocarbon refrigerant as refrigerants used in absorption system because it is free from the limitations of high freezing temperature of the refrigerant and low crystallization temperature of the solution. ammonia based refrigerant systems cost up to 10-20% less than one that uses CFCs because of using narrower diameter pipes. Hence, ammonia is affordable than CFCs and HFCs.
compression system for air conditioning the car cabin. Huge amount of heat energy with the exhaust gases from an engine are wasted. An energy balance sheet of the accessible energy in the combustion of fuel in a car engine shows that one third is converted into shaft work, one third is lost at the radiator and one third is wasted as heat at the exhaust system. Exhaust gas energy of an IC engine can be used to power a vapor absorption refrigeration system for air-conditioning the car cabin. Hence there will be reduced amount of load on the engine to run compressor, so pollution can be reduced up to 15%.
2. LITERATURE REVIEW Optimum design of car air conditioning has always been in limelight of automotive manufacturers and academic researchers during the last few decades. Two crucial targets for the auto industry are to improve the efficiency are diminution of fuel consumption and tailpipe emission.
Key Words: Car air conditioning, Vapor compression refrigeration system, Waste heat of car exhaust, Vapor absorption refrigeration system, Car Heat Load.
1. INTRODUCTION
Isaac Mathew Pavoodath, [1] investigated that adsorption refrigeration systems contains many benefits besides environment friendly refrigerants as well as electricity savings. Briefly, they are: simplicity, low maintenance, and high temperature heat input capability, less pump power, inherent flexibility in operation, with a system performance insensitive to ambient temperature. Reddy et. al, [2] has suggested that exhaust gases can be used as an alternative energy source to run the air conditioning system in cars. They have carried out experiments and have obtained that heat available at exhaust gas is 5.5 kw and heat carried by cooling water is 12.54 kw. Vapor absorption refrigeration system is undoubtly an attractive substance that utilizes the waste heat from CI engine. For the present research, a vapor absorption system associated with waste heat repossession from four stroke diesel engine is used to find out the coefficient of performance and energy consumption and the energy consumption of 220 kJ/K is saved than the existing system. S Wang, [3] designed, simulated and validated the prototype, preliminary analysis (Wang, 1997) presented that a absorption refrigeration plant with a 2 kW cooling load at 0℃ and with water as a secondary fluid, is more than sufficient to air-condition the passenger void of the Nissan 1400 truck. In the exhaust gases of motor vehicles, there is
The major difficulty to overcome the development of internal combustion engine is the reduction of emissions it is achieved by increasing the engine efficiency and this can be achieved by using waste heat of exhaust gases. The recovery of waste energy or waste heat recovery is heat, which is produced in a process by way of fuel combustion or chemical reaction and then dumped into the environment even through it could still be reused for some useful and financial resolution. For such cases, vapor compression air conditioning system is used for cooling the cabin and in goods carrying. Internal combustion engine efficiency can be increased by attaching absorption refrigeration system. A generator is a unit of Vapor absorption refrigeration system which recovers heat from the exhaust gases of the IC engine and reduces the temperature and emissions as well. With help of waste heat energy, the coefficient of performance is increased to 23% and it is estimated that recovery of waste heat reduces heat lose and improves performance of system. The heat released to exhaust gases can be between 150400℃. This source of heat and high mass flow rate of exhaust gases are the most suitable source of running and working the generator of Vapor absorption refrigeration system. From past few decades, aqua-ammonia is one of the widely
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