0.5 0.75 1.0 1.25 1.5
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0.5 0.75 1.0 1.25 1.5
T5 SOLUTIONS (Waitz)
a) Draw a thermodynamic cycle on p-v and T- v diagrams consisting of
Leg 1-2: adiabatic expansion
Leg 2-3: constant volume heat addition
Leg 3-4: constant pressure expansion
Leg 4-1: isothermal compression
Assume that all processes are quasi-static and involve an ideal gas.
Pressure (kPa)
l
ines of
c
onstant
t
emperature
1
3
4
2
For 1-2, pvγγ
γγ=constant
adiabat is steeper than
pv=constant (an
Temperature (Kelvin)
Specific Volume (m
3
/kg)
isotherm)
3
4
1
2
l
ines of
c
onstant
p
ressure
F
or 1-2, Tvγγ
γγ−−
−−11
11=constant
a
curved line much like the
a
diabat on a p-v diagram
b
ut it would be shallower
Specific Volume (m
3
/kg)
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