Abstract
Performance evaluation of an air conditioner using R410a has been evaluated by field measurement of pressure and temperature at suction and discharge line. Two methods were used for temperature measurement. First, the sensors were mounted on the outer wall of pipe and second, the sensors were inserted into the refrigerant flow in the pipe. Using the second method, the suction temperature is averagely 5.0°C lower and the discharge temperature is 17.8°C higher than that of the first method. The coefficient of performance and power consumption resulted from the second method is in a good agreement with that of standardized test according to ISO 5151:2017. This indicates that the temperature sensor insertion to the refrigerant flow gives the better accuracy in the evaluation of performance of an air conditioner.
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