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The objective of this study was to measure the effects of improper airflow and refrigerant charge on the seasonal performance of a typical 10.6kW, R-410A residential heat pump with a thermostatic expansion valve.Heating and cooling tests were performed in combinations of three refrigerant charges of 75%, 100%, and 125% of nominal value and two airflows of 75% and 100% of rated airflow. In addition,...
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