Design of A Car Air Conditioning System Based On An Absorption Refrigeration Cycle Using Energy From Exhaust Gas Of An Internal Combustion Engine

P. Srinivasulu, P. Raju, J. Prudviraj

Abstract


Air conditioning is the process of altering the properties of air (primarily temperature and humidity) to more favorable conditions. A rough energy balance of the available energy in the combustion of fuel in a motor 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. Even for a relative small car-engine, 15 kW of heat energy can be utilized from the exhaust gas. This heat is enough to power an absorption refrigeration system to produce a refrigeration capacity of 5 kW. Where thermal energy is available the absorption refrigerator can very well substitute than the vapour compression system. An absorption refrigerator is a refrigerator that uses a heat source (e.g., solar, kerosene-fueled flame, waste heat from factories or district heating systems) to provide the energy needed to drive the cooling system.

In this thesis, energy from the exhaust gas of an internal combustion engine is used to power an absorption refrigeration system to air-condition an ordinary passenger car. All the required parts for the absorption refrigeration system is designed and modeled in 3D modeling software CREO parametric software. Thermal analysis is done on the main parts of the refrigeration system to determine the thermal behavior of the system. Analysis is done in ANSYS.


Keywords


A Car Air Conditioning, Refrigeration Cycle, Exhaust Gas, Internal Combustion Engine

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