- #1
stoky
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Homework Statement
We want to fill a bottle with R-134a. The fluid comes from a fluid line.
- The bottle is initially empty, the bottle volume is 12 litres, the bottle is insulated (adiabatic filling).
- The fluid line contains R-134a at 20 bar, saturated steam.
Homework Equations
Using the second equation of energy balance.
The Attempt at a Solution
From the bottle perspective:
Qcv=0
Wcv=0
dEcv/dt=m•ui
me=0
hi=428.2 kJ/Kg
Then:
mi•ui=mi•hi
Then
ui=428.2 kJ/Kg
Which reading R134a tables results in superheated steam: P2=2000 kPa, u2=428.2 kJ/Kg.
Results in m2 (bottle)=1.11 Kg
Specific volume=0.01081 m^3/Kg
Temperature=83.18 celsius
My concern is if the calculations are correct.