My question is below. Could you please include an easy to follow solution. Here
ID: 2032954 • Letter: M
Question
My question is below. Could you please include an easy to follow solution. Here is the link to the table.
http://homepages.wmich.edu/~cho/ME432/Appendix1Udated_metric.pdf
A colleague is proposing an energy efficiency measure in which on otncviSe wasted scuice of thermal enevgy at 1.90? is used to power a heat engine . The propsal involves rejection Gf heat from the engin? to the environ ment at 25C (a) Wnat is the very best memal effiviency that ore could hope to obtoin from such a heat engine ? (b) If this bcst -efficiency neat engine dlrans hevmal enevoy from the spurce at a rate of 2.2kw at what rate ust t be dclivenng heat to the envircnment?Explanation / Answer
a) best efficiency = 1 - T(cold) / T(hot)
=1 - (273 + 25) / (273 + 90)
= 0.18
b) efficeincy = work done / heat suuplied
E = (Qc - Qr) / Qc
0.18 = (2- Qr) / 2
Qr = 1.64 kW
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