Reduction in Size of Vars by using Different Materials in Generator using

In present scenario to achieve refrigeration effect, we have to supply high grade energy which take from shaft which decreases the millage of automobile and increase in cost of fuel. It is not economical to produce refrigeration effect by VCRS .In VARS system we use wasteful energy from exhaust gases of automobile to produce refrigeration effect hence saving cost of fuel. Optimization of length of tubes of heat exchanger (generator) is done for different material like stainless steel, aluminium, copper to achieve 1TR Refrigeration effect. Inlet temperature of generator is 25⁰C and COP of refrigerator is 0.7.


INTRODUCTION
Comparison between VCRS and VARS

VCRS VARS
1. In VCRS we use compressor that uses hybrid energy in the form of work.
1. In VARS we use generator, Absorber and pump that uses low grade energy, in form energy 2. The refrigerating effect or refrigerating capacity decreases with lower evaporator pressure 2. Very little effect is seen In the refrigerating capacity with lowering evaporator pressure.
3. VCRS doesn't work at partial load 3.Varying load doesn't affect performance of VCRS 4. Refrigrant and Hydrocarbons CFCs hydrochlorofluorocarbon's 4. Ammonia or water can be used as Refrigerant with proper absorber.
The continuos increase in the cost and demand for energy has lead to more research and development to utilize avalible energy resources efficiently by minimizing waste energy with reference to [1] Replacing the electrical energy with solar energy will reduce the consumption of high grade electrical energy.also the replacement of compression system with absorption system eliminates the energy consumption by compressors [2] In the context diesel engine exhaust heat utilization has the potential to reduce the consumption of fossil fuels and reduce the release of greenhouse gases, significant waste heat recovery technologies have been developed to recover exhaust heat and turn it into useful energysuch as electricity[5] To reduce

IJTSRD23473
International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID -IJTSRD23473 | Volume -3 | Issue -3 | Mar-Apr 2019 Page: 1590 the Ozone depletion many refrigerant has been banned and due to increase in global warming it is necessary to have an alternate source which will be reliable and meet the future requirements in cars [7] Engine specification of Toyota Innova Crysta   For low temperature we use Aluminium, and for the high temperature we use chromium to replace the stainless steel which has high melting point up to 1907oC-
[5] S.L Nadaf, P B Gangavati2, a review on waste heat recovery and utilization from diesel engine, international journal of advanced engineering technology E-ISSN 0976-3945.
[6] Abhilash Pathania Dalgobind Manto(2012), recovery of engine waste heat for reutilization in air conditioning system in automobile,global journal of research in engineering mechanical and mechanics engineering vol2,issue-1,version1.0.
[7] Sandeep Chakraborty 1 , Dr.Pravin Kumar borkar2, extracting waste heat engine from the engine exhaust and reutilization in car air conditioning, international research journal of advanced engineering and science, ISSN: 24550-9024.
[12] Sachidanand J.Nimankar *1 and Prof.Sachin Kumar Dahake 2 (2016),review of heat exchanger ,global journal of engineering science and research s [13] Rotchana Prapainap,KO Suen, effect of refrigerant properties on refrigerant performance comparison: A review international journal of engineering research and application (ijera) vol, issue, July aug