A test reported a gas flow rate of 10,000 standard (f^3)/min (@ 25C and 1atm) Th
ID: 2074559 • Letter: A
Question
A test reported a gas flow rate of 10,000 standard (f^3)/min (@ 25C and 1atm) The temperature, pressure, and water content of the gas are 100C, 1atm, and 20% by volume respectively.
1) The gas flow rate based on actual conditions of temperature and pressure (20C and 1atm), is most nearly:
a- 10,000 actual f^3/min
b- 12,517 actual f^3/min
c- 7,989 actual f^3/min
d- none of the above
2)The gas flow rate, expressed on a dry standard basis, is most nearly:
a- 10,000 dry standard f^3/min
b- 8,000 dry standard f^3/min
c- 12,5000 dry standard f^3/min
d- none of the above
Explanation / Answer
Qstd = 10000 f3/min; Tstd = 25oC = 298K; Pstd = 1 atm; Vwet = 100%; Vdry = 80%
Tact = 100oC = 373K; Pact = 1 atm;
1. Flow rate at actual condition Qact = (Tact / Tstd) (Pstd / Pact) Qstd = (373 / 298) (1 / 1)*10000 = 12516.7 = 12517
Answer: Option b) 12517 actual f3/min
2. Qdry = (Vdry / Vwet) Qstd = (80 / 100)*10000 = 8000
Answer: Option b) 8000 dry standard f3/min
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