Improving Internal Combustion Engine Performance by Using Reduced Power Air Conditioning System
Abstract
The paper studies and analyzes the effects of adsorption air conditioning system instead of the classical compression unit on the vehicle internal combustion engine (ICE) performance. The adsorption system uses the residual heat from the ICE cooling circuit to create the necessary thermodynamic conditions to reduce the temperature in the vehicle cockpit. The proposed system has the advantage of no mobile parts for operating since it works on pressure difference base. The system improves the coefficient of performance (COP) of the internal combustion engine since it uses thermal energy released at the engine cooling to generate air conditioning. The simulation has proved the validity of the proposed system for current vehicle driving conditions. The system is suitable for low-power engines where conventional compression units do not fit because of the high power requirements of the air conditioning system. The new A/C system increases the coefficient of performance of the internal combustion engine up to 4% when replacing a classical adsorption air conditioning unit and up to 25% if the replaced A/C system is a compression one. The COP of the ICE increases linearly with refrigerant mass flow and decreases with engine power for a given flow mass. The proposed system is more effective in low power engines, but applies to power range up to 150 kW. The paper shows the influence of low power ancillary equipment on the internal combustion engine global efficiency.
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DOI: https://doi.org/10.37628/ijicegt.v9i2.1600
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