A standard Diesel air cycle receives 30 kJ of heat per cycle while running at 310 rpm. At the beginning of compression the conditions are 120 kPa, 315 ° K and 0.045 m3. At the beginning of the heat addition, the pressure is 3550 kPa. Determine: a) P, V, T for each state of the cycle. b) The work done. c) The developed power. d) Mean effective pressure

An air-standard dual cycle has a compression ratio of 9.1 and displacement of Va = 2.2L. At the beginning of compression, Pi = 95 kPa, and T = 290 K. The heat addition is 5 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine: a) each of the unknown temperatures at the various state, in K. b) the net work of the cycle, in kl. c) the power developed at 3000 cycles per minute, in kW. d) the thermal efficiency. e) the mean effective pressure, in kPa.

A six cylinder 1.8 litre spark ignition engine is required to develop an output of 75 kW at 3500 rev/min. The compression ratio of the engine is 10:1. The operating cycle of the engine follows the ideal Otto cycle, the pressure and temperature before isentropic compression is 1 bar and 15°C respectively, determine; a) Efficiency based on the Otto cycle b) Required rate of heat addition c) Mean effective pressure d) Maximum temperature of the cycle Note:phs Otto cycle efficiency 7 = 1 1 ۲۷-۱ Assume cv =0.718 kJ/(kg K), y = 1.4, R = 0.287 kJ/ (kg K)

An ideal, air-standard Diesel cycle has a compression ratio of 20. The maximum temperature is 2200 K while the air is 320 K and at 105 kPa before compression. Assume that specific heats vary with temperature. a) Report the temperature after isentropic expansion in K to one decimal place using rounding. b) Report the net work produced in kJ/kg to one decimal place using rounding. c) Report the overall thermal efficiency as a percentage (0 to 100) to one decimal place using rounding.

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In a standard Diesel cycle, compression starts at the final ambient conditions of the addition of heat, conditions are 5.0MPA for pressure and 1750 ° C for temperature.  Using with specific heats evaluated at 300K.  Determine: a) The mean effective pressure, in kPa.  b) The thermal efficiency of the cycle.  c) The cut-off ratio.  d) The compression ratio.

Need help with this homework problem.   At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L.  Determine per cylinder: a)    the volume at state 1 in L.b)    the air mass per cycle.c)    the heat addition per cycle, in kJ.d)    the heat rejection per cycle, in kJ.e)    the net work per cycle, in kJ.f)     the thermal efficiency.g)    the mean effective pressure, in bar.h)    Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i)    Devise and evaluate the exergetic efficiency for the cycle.

Multiple Choice. Choose the correct answer and show COMPLETEsolution. (Diesel cycle)

An air-standard Otto cycle has a compression ratio of 9. At the beginning of compression, P1 = 100 kPa and T1 = 300 K. The heat addition per unit mass of air is 1350 kJ/kg. Determine: a) the net work, in kJ per kg of air b) the thermal efficiency of the cycle c) the mean effective pressure, in kPa