A) 30 kW
B) 15 kW
C) 12 kW
D) 6 kW.
Correct Answer: C
Solution :
\[{{T}_{1}}=237+27=300\,K\] \[{{T}_{2}}=237-23=250\,K\] \[{{(COP)}_{\operatorname{Re}f}}=\frac{{{T}_{2}}}{{{T}_{1\,}}-{{T}_{2}}}=\frac{250}{300-250}=\frac{250}{50}=5\] \[Q=\frac{3600}{3600\times 10}[2\times \left( 27+3 \right)+0.5(-\,3+23)+230]\]\[\,\,=\,\,30kJ/s\] Actual \[COP\,\,=\,\,\frac{5}{2}\,\,=\,\,2.5\] \[W=\frac{30}{2.5}=12\,\,kW\]You need to login to perform this action.
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