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  1. KontrolFreak

    Rate of Change of Decreasing Pressure in Vessel (Help a EE!)

    Thanks Latexman. Had that equation but the reminder to use absolute made my day and a huge difference!
  2. KontrolFreak

    Rate of Change of Decreasing Pressure in Vessel (Help a EE!)

    Do not need to get too detailed, but I need to know the rate of change of the pressure in a vessel(gas digester) caused by a compressor sucking the gas (methane) out. Starting pressures are 0-10 inches.
  3. KontrolFreak

    Gas Pressure Spike due to Valve Closing(A EE in need)

    Definitely looking for the pressure spike. I am looking for a quick estimation equation / program / calculation. I just can not see that affecting the system pressure that much. I had a Chem E quoting PV=nRT blah blah blah and he thought it would be like a fluid water hammer and wreck...
  4. KontrolFreak

    Gas Pressure Spike due to Valve Closing(A EE in need)

    1. 1000 ft 20" gas (methane) pipeline flowing 1250 scfm @ 5-10" W.C. 2. Valve closes 3. How high will the pressure "spike" ? 4. 2 - 8 Bio Gas digesters = huge volume in dome.

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