1. Use constant specific heats at room temperature in solving the problem.An air-standard cycle with variable specific heats is executed in a closed system with0.005 kg of air and consists of the following three processes:1-2 v= constant heat addition from 95 kPa and 18°C to 375 kPa2-3 Isentropic expansion to 95 kPa3-1 P = constant heat rejection to initial state(a) Show the cycle on P-v and T-s diagrams.(b) Calculate the net work per cycle, in kJ.(c) Determine the thermal efficiency.

The air standard cycle consists of three processes:Process 1-2: Constant volume heat additionProcess…

Answered: Use constant specific heats at room…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Thermodynamics Instructions: Draw the T-s and Schematic diagram for this problem
A newly purchased sedan car operates on an ideal thermodynamic cycle. The engine has acompression ratio of 10. The ambient air pressure is 1 bar while temperature is 21 ºC. Themaximum temperature in the engine is 1600 K. Draw the ideal power cycle and label it.Utilizing the air-standard assumptions, determine (a) the gas temperature at the exits of thecompression and the expansion processes, (b) the specific works of compression, expansionand net, (c) heat supplied to the engine and (d) the thermal efficiency.
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A cycle for a piston-cylinder device is described by the following four processes: 1-2 Isothermal compression at 300 K, from 100 kPa to 600 kPa 2-3 Constant pressure heat addition until the temperature is 800 K 3-4 Isentropic expansion until the volume at state 4 equals the volume at state 1 4-1 Constant volume heat rejection until the temperature is 300 K Assume the working fluid is an ideal gas with constant specific heats and has properties as follows: Cv = 0.6 kJ/kg-K, Cp = 0.9 kJ/kg-K, R=0.3 kJ/kg-K, k=1.5 Determine the heat added, the work out, and change of entropy during process 1-2.

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