3. (Dual combustion cycle) At the beginning of compression in an ideal dual combustion cycle, the working fluid is 1 lb. of air at 14.1 psia and 80 °F. The compression ratio is 9, the pressure at the end of the constant volume addition of heat is 470 psia, and there are added 100 Btu during the constant pressure expansion. Find (a) [p, (b) [c, (c) the percentage clearance, (d) e, and (e) Pm.

5. In an ideal Otto Cycle, the pressure at the beginning of the compression process is 15 psia, the temperature is 70F and the volume is 13.08 cubic feet. The maximum temperature of thre cycle is 2804F, and the heat supplied is 372 BTU. Using constant specific heat, calculate: a. The temperature at the beginning of the combustion, Rankine b. The compression ratio c. The temperature at the end of the expansion process in Rankine d. The net work of the cycle in BTU e. The thermal efficiency of the cycle in percent

1. (Otto Cycle) An Otto cycle operates on0.1 Ib/s of air from 13 psia and 130 °F at the beginning of compression. The temperature at the end of combustion is 5000 °R; compression ratio is 5.5; hot air standard, k = 1.3. (a) Find V1, P2, t2, P3, V3, tą and P4 (b) Qa, Qr, w, e, and the corresponding hp.

At the beginning of compression, Otto cycle works on 0.2 lb/s of air at 14 psia and 130F. The temperature at the completion of combustion is 4500R, the compression ratio is 5.5, and the hot-air standard is k = 1.3. a. Find V1 , P2 , T2 , P3 , V3 , T4b. Compute the heat added (QA),heat rejected (QR), work (W) andthe cycle efficiency (e).