Physics

Physics, 20.07.2019 10:30, ani61

An air-standard otto cycle has compression ratio 10 and maximum cycle temperature 1000 k. evaluate the thermal efficiency and specific work of the cycle. what would be the thermal efficiency and specific work if it was a diesel cycle to the same maximum temperature? what would be the thermal efficiency and specific work if it was a dual pressure cycle to the same maximum temperature, where half the energy addition was from constant volume and half the energy addition as from constant pressure?

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Engineering, 11.07.2019 04:20, Annlee23

An otto cycle, analyzed using cold air-standard assumptions, has a a)-if the thermal efficiency of the cycle is 0.57, find the specific work b)- plot the thermal efficiency as a function of the compression ratio c)- based partially on the previous plot, would you continue peak temperature of 2500 k and a peak pressure of 60 bar during the isentropic expansion. for a cold air-standard otto cycle, using values of r =5,10,15,20. increasing the compression ratio, without reservations, in an actual design? explain.

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Engineering, 21.08.2019 05:30, desirekotta20

An ideal otto cycle has a compression ratio of 9. at the beginning of the compression process p =100 kpa and t=27°c. the maximum cycle temperature is 1100°c. find the temperature, pressure and specific volume at states 1,2,3, and 4. find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. calculate the thermal efficiency of a carnot cycle operating between the same temperature limits.

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Engineering, 29.09.2019 01:10, huntbuck14

Aspark ignition engine is to be modeled using fluid, air, is at 95 kpa and 290 k before compression. the compression ratio is 9 and the maximum temperature is 2000 k. for the calculations below use variable specific heats an ideal otto cycle. the working a) find the pressure and temperature at the end of compression (kpa, k) b) find the required heat input into the cycle on a specific basis (kj/kg) c) find the net specific work from the cycle (kj/kg) d) find the cycle thermal efficiency.

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Engineering, 25.10.2019 01:43, autumperry3599

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 = 2.3 l. determine per cylinder: a) the volume at state 1. 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.

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