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Reduction of the Power Consumption of An A/C System
Published May 18, 2003 by Institution of Mechanical Engineers in United Kingdom
For an automotive A/C System the influence of technical features as external compressor capacity control, condenser fan control and air inlet flap control on the gain in power consumption was evaluated on a test mule according to the New European Driving Cycle (NEDC). Comparative tests were run with an optimized AC system versus a reference system for different climatic conditions using a matrix taking into account their annual occurrence. In this way, the annual gain in terms of power consumption was evaluated by measurements of compressor shaft power and electrical power consumption.
Connected to that, the feasibility of a compressor torque estimation algorithm was evaluated by comparison of the estimated compressor shaft torque to a compressor shaft torque measurement during test campaigns in a climatic wind tunnel and during road tests.