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Oksi-84 [34.3K]
3 years ago
11

If you are unsure about holding a piece of wood to be drilled, then you should always use a

Engineering
1 answer:
alisha [4.7K]3 years ago
4 0
C I took construction class
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A heat pump receives heat from a lake that has an average wintertime temperature of 6o C and supplies heat into a house having a
Dafna1 [17]

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a) \dot W = 1.062\,kW

Explanation:

a) Let consider that heat pump is reversible, so that the Coefficient of Performance is:

COP_{HP} = \frac{T_{H}}{T_{H}-T_{L}}

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The minimum heat received by the house must be equal to the heat lost to keep the average temperature constant. Hence:

\dot Q_{H} = 60000\,\frac{kJ}{h}

The minimum power supplied to the heat pump is:

\dot W = \frac{\dot Q_{H}}{COP}

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\dot W = 1.062\,kW

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