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An ideal Otto cycle has a compression ratio of 7, at the beginning of the compression process, P1=90 kPa, T1=270C, V1=0.004=m3. The maximum cycle temperature is 11270C. For each repetition of the cycle, calculate the heat rejection and network production. Also, calculate the thermal efficiency. Use constant specific heats at room temperature.

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Tauseef Shaikh
Tauseef ShaikhLv10
5 Mar 2021
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

The compression ratio of an Otto cycle, as shown in Figure 22.13, is VA/VB = 8.00. At the beginning A of the compression process, 500 cm3 of gas is at 100 kPa and 20.0°C. At the beginning of the adiabatic expansion, the temperature is TC = 750°C. Model the working fluid as an ideal gas with Eint = nCVT = 2.50nRT and y = 1.40.

(a) Fill in the table below to follow the states of the gas:

 

 

 

 

(c) Identify the energy input Qh, the energy exhaust Qc, and the net output work Weng. (d) Calculate the thermal efficiency. (e) Find the number of crankshaft revolutions per minute required for a one-cylinder engine to have an output power of 1.00 kW =1.34 hp. Note that the thermodynamic cycle involves four piston strokes.

Two moles of an ideal diatomic gas, with a ratio of heatcapacities γ = 1.40, initially has a pressure
p1 = 0.500 atm, a volume V1 = 45.0 L and a temperature T1. Then thegas undergoes the following
three-step cyclic process, as shown in the p-V diagram below.

(i) Adiabatic expansion from the temperatureT1,
pressure p1, and volume V1 to a temperature T2,
volume V2 = 65.0 L and pressure p2.
(ii) Increase in pressure at constant volume to a
pressure p3 and a temperature T3.
(iii) Isothermal compression to the original starting
pressure, volume, and temperature.question:(a) What is T1?
(b) What are p2 and T2?
(c) What are T3 and p3?
(d) What is the work done by the gas during each of
the three steps of the cycle? What is thenet work done by the gas during the entire cycle?
(e) How much heat is absorbed by the gas during each of the threesteps of the cycle? What is
the net heat absorbed by the gas duringthe entire cycle? Why should this last result be
exactly the same as the last resultin part (d)?
(f) If the cycle is repeated 15 times/second, what is the net workpower done by the system?
What is the net heat power absorbedby the system?

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