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Tangeton
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Homework Statement
A heat pump fitted with a 120W electric motor supplies 600W of heat per second to a room from outdoors. Calculate: a) the coefficient of performance of the heat pump
b) the heat gained from outdoors.
Homework Equations
Coeff of performance for heat pump = Qin/ W = Qin/(Qin-Qout)
Qin = Qout + W
The Attempt at a Solution
(a)
P = 600J/s
W = 120
P = Wt --> 600 = 120t --> t = 0.2s
Qout = Pt = 600 x 0.2 = 120J
Qin = 120 + 120 = 240
Qin/Qin - Qout = 240/240-120 = 2
The answer is 5.
(b)
120.
The answer is 480W
Please help...
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