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3.) Consider a cold air-standard Otto cycle. Operating data at table below. The and R = 0.06855 Btu/(lbm-R). principal states in the cycle are given in the heat rejection from the cycle is 86 Btu per Ibm of air. Assuming constant specific heats a) State TR) P(psla b) c) d) Determine the compression ratio. (10 points) Determine the thermal efficiency. (15 points) Sketch the P-v diagram for this cycle. (4 points) Sketch the T-s diagram for this cycle. (4 points) 47.50 1204.1 1030 2408.22060 95 500 2 3 4 1000
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(3) Soluion Civen hat 2 1204. / | 1030 2408 22060 AS 4 () In otto Cycle 2 1030 1 Y t 30 I-4-l4 Tsenhropic expansion P2 4 P4 Isen hop1c comprrssi Dr NA Volurre constant volurne 2. Canstant vol ume. 51ES2

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