Study on Performance Evaluation Method of a Split Air Conditioning System Based on Characteristic Curve of the Compressor Mass Flow Rate

摘要

This paper deals with the actual performance evaluation method of a split air conditioning system based on characteristics curve of the compressor mass flow rate. Generally, it is very difficult to evaluate the actual performance of a split air conditioning system, because the heat flux in an air blow unit is very complicated, measurement of the temperature and wind velocity is very difficult. Then, we examined how to evaluate performance, from both of the enthalpy difference and the refrigerant mass flow rate which circulate through a system. The test unit was a gas engine-driven heat pump split air conditioning system. Regression equations for refrigerant mass flow rate were obtained based on characteristic curve of the scroll compressor. Cooling and heating capacity were given by multiplying the approximated mass flow rate by the differential of enthalpy pass the refrigerant piping mean the inside machine. The standard errors of the approximated mass flow rate from the measured values were within 0.05 kg/min. We compared the calculated mass flow rate with the previous detail data in order to verify these equations. Then the relative errors of the calculated from the measured values were within 2%.