OTTO Cycle Revision + Comparison
An ideal Ono cycle has a compression ratio of 8. At the beginning ofthe compression process, air is at 100 kPa and 17°C, and 800 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Using the THREE different methods, determine: The maximum temperature and pressure that occur during the cycle, the net work output, the thermal efficiency, and the mean effective pressure for the cycle.
Case (1) : Adiabatic Compression & Expansion + Constant Specific Heat
Case (III] : Variable Specific Heat U ~ tnu r \ ~ .b ~ ({+--\T") I) PI =ltm \C-P" UI :0-266', '1 \ ~
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:. Flo.bl.z ~ =- IS-;;-{: , /-L~~'12 6.1<'8
~\)j_ '::-~ ~) f'l ~ Lp Y)'\,<-\\ c-n TL
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," W~D -:. L\ 'l-u,\ ':.- !2~ '8' 'L- ~ \La
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VccJ--=- ~-\..A\-- J ~ r./
W~ '::- Lt I 'is' 'L
Srt, '2- lJ-P", +(V) 17(0 ::.
fY'1-4-f_ =- 1- YM_ :::: 6· ~2-'L- -L . t"/fA %vt
~ ri]ea ~+ UJ~fY\4f\ w~J,~o
\ @) o<-gs9- 66<1,b 61~!;1
2 @ O~~2r 3Jl~IL- £r ~
3 @ O~~lb 6r1-- £~.1 f,