An experimental study on variable air volume operation of ducted air-conditioning with digital scroll compressor and conventional scroll compressor

An experimental study on operation characteristics with variable air volume under refrigerating and heating condition of ducted air-conditioning (AC) unit with digital scroll compressor and conventional scroll compressor is conducted in this paper. The effects of air volume on the refrigerating (heating) capacity, input power, EER (COP), outlet temperature, discharge pressure, discharge temperature and suction pressure are studied. Compared with the ducted air-conditioning unit with conventional scroll compressor, the experimental results are the outlet temperature of ducted AC unit with digital scroll compressor is stable; the suction pressure and discharge pressure are normal; the discharge temperature drops a bit; the input power is lower. This shows that the unit with digital scroll compressor is well adapted to the variable air volume running and good for the economical and reliable operation of the ducted AC unit.