DEVELOPMENT OF VAPOR ABSORPTION REFRIGERATION SYSTEM IN AUTOMOTIVE TRUCKS FOR COLD STORAGE - Y. Lethwala

In general vapor compression refrigeration (VCR) system there are several drawbacks which we are resolving by developed vapor absorption refrigeration (VAR) system. This developed vapor absorption refrigeration system is for automotive truck cold storage. This document gives information about how much important is waste heat and using this we can develop a refrigerant system without taking input from battery, also design is developed based on vapor absorption refrigeration system which demands for future. This system is works on exhaust gas of vehicle. It can reduce the temperature of cold storage up to -11˚c compare to VCR system which can reduce temperature up to - 1˚c.

Fig. VAR system truck chassis connect with exhaust manifold

Vapor Absorption Refrigeration system is more effective than Vapor Compression Refrigeration system because it decreases temperature till -11 ֯C and also we eliminate use of Highway Cold Storage. Because of this we developed this System. The heat load on the generator can be met very easily by using the engine exhaust for both the systems as available energy rejected by cooling system of truck engine is more than sufficient. Even with a minimum assumed COP of 0.2, the required input to generator is 17.5 kW, while waste heat available is 34 kW. Hence from the discussion, ammonia/ water vapor absorption system is suggested for the application. Though the COP of the system is less but since waste heat is given as input, it is not a matter of concern.

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