Example 3.15: A fluid at 4.15 bar is expanded reversibly according to a law PV = constant to a pressure of 1.15 bar until it has a specific %3D volume of 0.12 m3/kg. It is then cooled reversibly at a constant pressure, then is cooled at constant volume until the pressure is 0.62 bar; and is then allowed to compress reversibly according to a law PVn = constant back to the initial conditions. The work done in the constant pressure is 0.525 kJ, and the mass of fluid present is 0.22 kg. Calculate the value of (n) in the fourth process, the net-work of the cycle and sketch the cycle on a P-V diagram.Answer: n=1.3182, network 0.9076 kJ

Example 3.15: A fluid at 4.15 bar is expanded reversibly according to a law PV = constant to a pressure of 1.15 bar until it has a specific %3D volume of 0.12 m3/kg. It is then cooled reversibly at a constant pressure, then is cooled at constant volume until the pressure is 0.62 bar; and is then allowed to compress reversibly according to a law PVn = constant back to the initial conditions. The work done in the constant pressure is 0.525 kJ, and the mass of fluid present is 0.22 kg. Calculate the value of (n) in the fourth process, the net-work of the cycle and sketch the cycle on a P-V diagram.Answer: n=1.3182, network 0.9076 kJ

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

Example 3.15: A fluid at 4.15 bar is expanded
reversibly according to a law PV = constant
to a pressure of 1.15 bar until it has a specific
volume of 0.12 m3/kg. It is then cooled
reversibly at a constant pressure, then is
cooled at constant volume until the
pressure is O.62 bar; and is then allowed to
compress reversibly according to a law PVn
= constant back to the initial conditions. The
work done in the constant pressure is 0.525
kJ, and the mass of fluid present is 0.22 kg.
Calculate the value of (n) in the fourth
process, the net-work of the cycle and
sketch the cycle on a P-V diagram.Answer:
n=1.3182, network 0.9076 kJ

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