Questions and Answers
What is the energy added to a home by the heat pump in one hour?
7.35 kWh
If the heat pump is reversed to act as an air conditioner, what would be its coefficient of performance?
1 / COP = 1 / 4.20 = 0.238
What is the power required to operate the heat pump for 3 hours?
5.25 kWh
If the heat pump operates for 8 hours, how much energy does it add to the home?
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What would be the new power requirement if the coefficient of performance is increased to 5.00?
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Study Notes
Heat Pump Performance
- The coefficient of performance (COP) of the heat pump is 4.20.
- The heat pump requires a power of 1.75 kW to operate.
Energy Added to a Home
- The energy added to a home in one hour is calculated by multiplying the power by the time: 1.75 kW × 1 hour = 1.75 kWh.
Reversed Operation (Air Conditioner Mode)
- If the heat pump is reversed to act as an air conditioner, its coefficient of performance would be the reciprocal of the original COP: 1/4.20 = 0.238.
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