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 \ ~

1\ '"":.- 'L'1 0 tL-- "'-.J '('\ ':: 6+{ < \ l":I.

2) ~;- ~ "2.'L =....-1- "'::~ 0 '1--= ."0"\ ::. 'S11. <; \\ '\.) \ C« CIe­

.: ~\Qb~ U'l.--:o. tJ\:}~ II ~ I ~ =0 6<;7-, ~ Ie..

..~ .. p~\),,=- = ?, v~ _~ D ::: l 8CO K?Q ". I. . • 1"2- ' 'T ~/ \ '2- W

~) 0v,'VI:::: U$-~'l-\ -=") Ug = lfif· fl /A-"3"llt

:. Flo.bl.z ~ =- IS-;;-{: , /-L~~'12 6.1<'8

~\)j_ '::-~ ~) f'l ~ Lp Y)'\,<-\\ c-n TL­

4) ,.J '\\A, '\J \) <'3. ~ ~;:: ~ -;)V'C,,,': Cfl-. "0 fJ = 4g·86 Lf

_', £(Jl'Y\~ ~G.. vI'1 =sg~t'if '-f "~l~/ 14-:: 9-?J:6 k (JJl p,-\::,- ~~y, L\' (e.. )t;>Cr . "

," W~D -:. L\ 'l-u,\ ':.- !2~ '8' 'L- ~ \La

We.w<.\!> -:. l\ 'l,_ '.l ~ '::- 6 8.~ \ '?o.'1- ~ ClI' U' I _ Q C'., I, '$]J ,/ t

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,