- #1
Runaway
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Homework Statement
A) A house loses thermal energy through the exterior walls and roof at a rate of 5440 W when the interior temperature is 23.4 C and the outside temperature is −6.6 C.
Calculate the electric power required to maintain the interior temperature at Ti if the
electric power is used in electric resistance heaters (which convert all of the electricity
supplied to thermal energy).
Answer in units of W.
B) Find the electric power required to maintain the interior temperature at Ti if the electric
power is used to operate the compressor of a heat pump with a coefficient of performance
equal to 0.3 times the Carnot cycle value.
Answer in units of W.
Homework Equations
COP = Qh / W
The Attempt at a Solution
Part A is 5440 W because for the temperature to stay constant the energy leaving the house must be replaced at the same rate.
I'm not sure how to set up an equation for part B.