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As ideal gas undergoingcyclie process ABC .A consistingof isothermal expansionAB, isobariccompression BC & adiabatic copmressionCA. Findthe %(approximate) efficiencyof cycle. [Given: T_(A)= T_(B)= 400 K , gamma =1.5, In2= 0.7,2^(1//3)=0.8] |
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Answer» Solution :`T_(C) = T_(A) [(P_(A))/(P_(C))]^((1-gamma)/(1.5)) = 400 [(2)/(1)]^((1-1.5)/(1.5)) = (400)/(2^(1//3))= 400 XX 0.8= 320` `eta= - (W_("Total") )/(q_("ABSORBED"))` `W_(AB) = -n 400R lno2 =-280 n R` `W_(BC) = - nR (T_(C) - T_(B)) = - n R(320-400) = 80 n R` `W_(CA) = (nR)/(gamma-1)(T_(A) -T_(C))` |
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