| Summary: | 碩士 === 國立臺北科技大學 === 能源與冷凍空調工程系碩士班 === 102 === Air-conditioning is major power use for electric automotive, second only to the driving power. For the compressor replacing the belt-driven to electric power gives rise to many advantages. The air-conditioning system can be controlled to meet the demand and also at different driving conditions. The demand control would also save power so to prolong the driving distance. In this study an electric power air-conditioning with both heating and cooling was setup for experimental investigation. The operating parameters tested include the compressor speed, the opening of electronic expansion valve, fan speed control for the condenser and the evaporator. The test results of the above parameters were analyzed at different air-conditioning demand. High energy efficient operation modes of the compressor in respond to the demand were discussed. The operating modes include fast cooling and energy saving. The test results can be a good reference in the future development of the electric vehicle air-conditioning.
The research results showed that the electronic expansion valve opening was the key factor of the evaporation pressure, and would also affect the system capacity with the compressor speed constant. With the vehicle moving fan energy saving control can save by 10% in air-conditioning mode, and was 10.8% in heating mode. When the compressor speed was controlled responding to the demand, compared with fixed compressor speed, power saving of 27.1% can be achieved in air-conditioning mode, and was 30.8% in heating mode. When both the compressor speed and the fan control were used simultaneously in driving mode, compared with fixed compressor speed, the power saving was 37.1% in air-conditioning mode, and was 41.5% in heating mode.
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