8_pdfsam_Quizzes 11-14 solutions_1

8_pdfsam_Quizzes 11-14 solutions_1 - In a diesel cycle...

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Unformatted text preview: In a diesel cycle going from point -' -- A clockwise in the P-V diagram, the gas—air mixture is first adiabatically compressed (A —) B), followed by an expansion at constant pressure (B 9 C). Next, an adiabatic expansion takes place (C 9 D), before an iso-volnrnetric process returns the system to point A (D 7" A), completing the cycle. Assuming that the mixture is an ideal, polyatomic gas with cv and Cp: - a. Compute the heat transfer AQ:1 and the heat transfer AQC (3 + 2 points). i. i. _; i . ‘3: i5] . I Q . i; i" AQM : WC“PAT : “C?(Tc— T3) AC9; : inc, AT : “CVCTVTQ Or- __..._ AG“ -; (SEEK? WEV thC’VA-Y 4‘ “RAT b: hCC,+R)AT = “($87 $162,: ”WNW = mm b. Denoting the temperatures at the respective points, A, B, C, D, as TA, TB, Tc, and TD, express the efficiency of the cycle in terms of the temperatures (2points). vial-lot 2 h—CfirgrQ- mtg—r, [QM M ...
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