- #1

stoky

- 7

- 1

## 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.