- #1
toothpaste666
- 516
- 20
Homework Statement
A)What is the coefficient of performance of an ideal heat pump that extracts heat from 11∘C air outside and deposits heat inside your house at 30∘C?
B) If this heat pump operates on 2000W of electrical power, what is the maximum heat it can deliver into your house each hour?
Homework Equations
COP = QH/W
COPideal = TH/(TH-TL)
The Attempt at a Solution
TH = 30 + 270 = 300
TL = 11 + 270 = 281
COPideal = 300/(300-281) = 16
that part came up right
for the second part
W = 2000 J/s
COP = QH/W
QH = COP(W) = 16 (2000 J/s) = 32000 J/s
32000 J/s (3600 s/ h) = 115200000 J/h
i rounded to 2 sig figs because that's what the question wanted but it was wrong. What mistake did I make?