In a Compressed Natural Gas "CNG" refueling station, gas supply is available at 250 bar and 315 K.
The atmospheric temperature is 295 K.
Find the mass of fuel supplied to a truck that has 4 X 60 liters fuel tanks if the final pressure in the fuel tanks is 200 bar in the following cases:
1. Fast fill with final temperature of the gas in the tank 345K
2. Adiabatic filling process (carbon fiber tanks)
3. Time fill (very slow fill) with final tank temperature 298K
Calculate also the heat transfer from the tank in each case.
For natural gas: Cp = 2.34 (kJ/kg K), Cv = 1.85 (kJ/kg K)
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