Consider the air-standard Otto cycle described in Problem 9.94. A particular cycle operates with a compression ratio

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Consider the air-standard Otto cycle described in Problem 9.94. A particular cycle operates with a compression ratio of 7:1 and has a heat input of 2100 kJ/kg. The pressure and temperature at maximum volume before compression (state 1) are 100 kPa and 15°C, respectively. Determine the net work produced by the cycle.


Problem 9.94


1-2 : Internally reversible, adiabatic compression from the maximum volume Vmax to the minimum volume Vmin.


2-3 : Constant-volume heat addition to a peak cycle temperature T3.


3-2 : Internally reversible, adiabatic expansion from Vmin to Vmax.


4-2 : Constant-volume heat rejection to return to the initial state.


Sketch this cycle using P–V and T–S coordinates, labeling each state point (1, 2, 3, and 4).


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Thermodynamics Concepts And Applications

ISBN: 9781107179714

2nd Edition

Authors: Stephen R. Turns, Laura L. Pauley

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