The engine's mechanical output is 88 * 104 W, and its theoretical maximum efficiency is 67.2%.
It's a dependable fuel; coal is a predictable, reliable, and dependable fuel as compared to solar or wind power. Despite not being at the vanguard of the country's energy output, it may offer a priceless backup service and a very dependable fuel for home stoves.
(a). The efficiency of a Carnot cycle linked with the same two reservoirs, as determined by Equation, is the appropriate level efficiency of this engine.
[tex]$\mathrm{e}_{\mathrm{C}}=1-\frac{\mathrm{T}_{\mathrm{c}}}{\mathrm{T}_{\mathrm{h}}}$[/tex]
Substitute numerical values:
[tex]$\mathrm{e}_{\mathrm{C}}=1-\frac{703.15}{2143.15}$[/tex]
= 0.672 = 67.2%
(b). Equation provides the engine's output power.
[tex]$\mathrm{P}=\frac{\mathrm{W}_{\text {eng }}}{\Delta \mathrm{t}}$[/tex]
Substitute for [tex]$W_{\text {en }}$[/tex] from Equation :
[tex]$\mathrm{P}=\frac{\mathrm{c}\left|\mathrm{Q}_{\mathrm{h}}\right|}{\Delta \mathrm{t}}$[/tex]
Substitute numerical values:
P = (0.42) (1.4 * 10⁵) / 1
= 88 * 10⁴ W
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