## Related questions with answers

Question

A heat engine cycle is executed with steam in the saturation dome. The pressure of steam is 1 MPa during heat addition, and 0.4 MPa during heat rejection. The highest possible efficiency of this heat engine is (a) 8.0% (b) 15.6% (c) 20.2% (d) 79.8% (e) 100%

Solution

VerifiedStep 1

1 of 2We look into table A-6 and determine the saturation temperatures for the given pressure and then calculate the maximum efficiency:

$\begin{align*} \eta&=1-\dfrac{T_{L}}{T_{H}}\\ &=1-\dfrac{143.71+273}{179.88+273}\\ &=0.08\\ &=\boxed{8\:\%} \end{align*}$

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