A heat pump is used for heating a building. It supplies 50,000 kJ/hr of heat to the building at 20°C. The outside air is at -5°C. Determine; a) the heat taken from outside air per hour, and b) the horsepower of motor required
P=50000 kJh=18.9 hp.P=50000~\frac{kJ}h=18.9~hp.P=50000 hkJ=18.9 hp.
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