A piston-cylinder system has a mass of piston of 900 kg and an area of piston equals to 0.00981 m². At the start of the process, 1.0 kg of water in the system is at its saturated vapour state at 20.0 MPa. The system is allowed to cool, at a constant volume, until its internal and external pressures are the same. At the end of the isobaric process, half of the cylinder is filled with liquid and half with vapour, by volume. Given Atmospheric pressure, Patm = 100 kPa Acceleration due to gravity, g = 9.81 m/s² a) Find the pressure, temperature, volume, and quality of vapour at each of the 3 states. State Pressure, P Temperature, T Volume, V kPa °C m³ 1 2 3 Quality of Vapour, x b) Determine the work done for this process (in kJ). c) Sketch the T (in °C) vs v (in m³/kg) diagram for this process.
A piston-cylinder system has a mass of piston of 900 kg and an area of piston equals to 0.00981 m². At the start of the process, 1.0 kg of water in the system is at its saturated vapour state at 20.0 MPa. The system is allowed to cool, at a constant volume, until its internal and external pressures are the same. At the end of the isobaric process, half of the cylinder is filled with liquid and half with vapour, by volume. Given Atmospheric pressure, Patm = 100 kPa Acceleration due to gravity, g = 9.81 m/s² a) Find the pressure, temperature, volume, and quality of vapour at each of the 3 states. State Pressure, P Temperature, T Volume, V kPa °C m³ 1 2 3 Quality of Vapour, x b) Determine the work done for this process (in kJ). c) Sketch the T (in °C) vs v (in m³/kg) diagram for this process.
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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Transcribed Image Text:2. A piston-cylinder system has a mass of piston of 900 kg and an area of piston
equals to 0.00981 m². At the start of the process, 1.0 kg of water in the system is
at its saturated vapour state at 20.0 MPa. The system is allowed to cool, at a
constant volume, until its internal and external pressures are the same. At the end
of the isobaric process, half of the cylinder is filled with liquid and half with vapour,
by volume.
Given Atmospheric pressure, Patm = 100 kPa
Acceleration due to gravity, g = 9.81 m/s²
a) Find the pressure, temperature, volume, and quality of vapour at each
of the 3 states.
State Pressure, P
kPa
1
2
3
Temperature, T Volume, V Quality of Vapour, x
°C
m³
b) Determine the work done for this process (in kJ).
c) Sketch the T (in °C) vs v (in m³/kg) diagram for this process.
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Shouldn't the temperatures of all 3 states be constant at 365.75 degC?
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why is quality of vapour 0 for state 3? shouldnt it be 0.5 as the qn stated that half of the cylinder is filled with liquid and the other half is filled with vapour?
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