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  1. #1
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    CH4 compression system



    To understand I am building a methane digester system, and am going to store the gas at 24.13Bar (350psi) in 3 * 100 pound lp tanks 0.2M^3 (7.05cubic feet)

    My feed stock will be at .69Bar (10 psi) ruffely and cool at say 10c (50F), so far my calculations tell me I'll have a 10.7 compression ratio and temp lift will be near 204C (400F) does this sound right to you all>


    Now in Redvers Sask.

  2. #2
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    Re: CH4 compression system

    Quote Originally Posted by The MG Pony View Post
    To understand I am building a methane digester system, and am going to store the gas at 24.13Bar (350psi) in 3 * 100 pound lp tanks 0.2M^3 (7.05cubic feet)

    My feed stock will be at .69Bar (10 psi) ruffely and cool at say 10c (50F), so far my calculations tell me I'll have a 10.7 compression ratio and temp lift will be near 204C (400F) does this sound right to you all>

    I'm not familiar with NH3 R50 but I've been trying to work
    out your numbers and either I'm completely wrong and have
    missed the point or your numbers are wrong?

    Methane at just under 1bar (10psi) raised in pressure to over 24 bar (350psi)
    is a pump ratio of 24? And as for the temperature lift, it is completely off
    my chart at 204degC.

    The chart I was using would not let me calculate the Isentropic efficiency and your
    numbers seem to be more Adiabatic and that is impossible???

    I found this http://petrowiki.org/Compressors


    Regards

    Rob

    .
    Last edited by Rob White; 29-06-2014 at 03:38 PM.
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  3. #3
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    Re: CH4 compression system

    I am pumping a 10c degree gas stream at 24.7psia to 264.7psia

    so I could well be wrong as I am pretty rusty at the perfect gas law
    Now in Redvers Sask.

  4. #4
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    Re: CH4 compression system

    I had no charts so was doing it via the perfect gas laws on paper all my info won't let me go about the -98c mark!
    Now in Redvers Sask.

  5. #5
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    Re: CH4 compression system

    Quote Originally Posted by The MG Pony View Post
    I had no charts so was doing it via the perfect gas laws on paper all my info won't let me go about the -98c mark!
    I agree, that was my struggle also (looks like I was using a similar chart).

    Does the web link offer you any further information.
    I'f I'm honest I struggle with perfect gas laws, so I might
    not be the best to help, hopefully others will have a better
    scientific mind and will be able to help.

    Rob

    .
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