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Recovery of Engine Waste Heat for Reutilization in Air Conditioning System in an Automobile: An Investigation Table 2 : Comparison between Vapour Compression and Absorption system 10 S.No. 1 2 3 4 5 6 Absorption System Uses low grade energy like heat. Therefore, may be worked on exhaust systems from I.C engines, etc. Moving parts are only in the pump, which is a small element of the system. Hence operation is smooth. The system can work on lower evaporator pressures also without affecting the COP. No effect of reducing the load on performance Liquid traces of refrigerant present in piping at the exit of evaporator Automatic operation for controlling the capacity is easy. Compression System Using high-grade energy like mechanical work. Moving parts are in the compressor. Therefore, more wear, tear and noise. The COP decreases considerably with decrease in evaporator pressure. Performance is adversely affected at partial loads. Liquid traces in suction line may damage the compressor It is difficult. II. OBJECTIVES OF THE STUDY a relatively high global warming potential (GWP) which is also being regulated by the Kyoto Protocol. They have cited that recent passage of legislation in the European Community requires the use of refrigerants with GWPs of less than 150 in all new-type vehicles starting in 2011 and in all new vehicles by 2017 Recently, Sami et al. [4] presented an improved dynamic model to study the single absorber and/or double absorber systems with heat recovery. The systems they studied employed an air cooled evaporator and an air cooled condenser. Hot oil, superheated steam or exhaust gas could be used as heating fluids for the absorbers. In these respects, they are similar to the automobile waste heat cooling system we propose. And it gave an insight into the thermodynamics for some of the system components. However, in their analysis, the cycle time was quite long and an equilibrium adsorption state was assumed. Colbourne [5] summarized a study analyzing over 50 published technical documents comparing the performance of fluorinated refrigerants and HCs. A significantly higher number of tests showed an increase in performance when using HCs as compared to using fluorinated refrigerants (Colbourne and Suen,)[6].Similarly, Colbourne and Ritter[7] investigated the compatibility of non-metallic materials with HC refrigerant and lubricant mixtures. They performed experiments in compliance with European standards for the testing of elastomeric materials and ASHRAE material compatibility test standards. Maclaine-Cross and Leonardi[8] compared the refrigerant performance of HCs based on refrigerant properties and concluded that the COP improvements, commonly reported in literature, were consistent with better thermodynamic properties of HCs. R600a properties and their influences on system performance were discussed. Joudi et al. [9] studied the performance The objectives of the study on the subject “Recovery of engine waste heat for reutilization in air conditioning system in an automobile: An investigation” are as follows 1. Identify the form of “muda” (waste) in traditional VCRS. 2. Compare the key characteristics of traditional VCRS and proposed VARS 3. Differentiate between existing refrigeration cost and proposed target cost 4. Identify data and tools useful for planning and assessing strategies for leadership in refrigeration quality in vehicle by use of SWOT analysis. III. SCOPE OF THE WORK Our scope of work is confined and limited to the study of VARS in lieu of VCRS through recovery of engine waste heat using radiator water as source / generator for VARS. The arrangement of various components of air conditioning system is also a challenge because of the fix size of cars. However, the dsigning aspects will be given due consideration after intial exeperimentation. In the proposed model condenser and evaporator will be arranged same as the conventional unit. IV. REVIEW OF LITERATURES There are various works available on the Adsorption cooling with exhaust gas heat of engine. But, no significant wok has been carried out by recovering and utilizing Engine heat in refrigeration system of a vehicle. According to Palm [1], Corberan et al.[2], Domanski and Yashar,[3]) ,most HFC refrigerants have © 2012 Global Journals Inc. (US) Global Journal of Researches in Engineering (A ) Volume XII Issue vvvvI Version I January 2012PDF Image | Recovery of Engine Waste Heat for Reutilization in Air
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