| 1 | subroutine calc_cpp_mugaz |
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| 2 | |
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| 3 | !================================================================== |
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| 4 | ! Purpose |
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| 5 | ! ------- |
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| 6 | ! Compute the atmospheric specific heat capacity. |
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| 7 | ! Compute the atmospheric mean molar mass. |
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| 8 | ! |
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| 9 | ! Authors |
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| 10 | ! ------- |
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| 11 | ! Robin Wordsworth (2009) |
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| 12 | ! |
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| 13 | !================================================================== |
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| 14 | |
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| 15 | implicit none |
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| 16 | |
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| 17 | #include "comcstfi.h" |
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| 18 | !#include "callkeys.h" |
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| 19 | #include "gases.h" |
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| 20 | |
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| 21 | integer igas |
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| 22 | |
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| 23 | cpp=0.0 |
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| 24 | mugaz=0.0 |
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| 25 | |
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| 26 | do igas=1,ngasmx |
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| 27 | |
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| 28 | if(igas.eq.vgas)then |
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| 29 | ! ignore variable gas in cpp calculation |
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| 30 | else |
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| 31 | ! all values at 300 K from Engineering Toolbox |
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| 32 | if(gnom(igas).eq.'CO2')then |
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| 33 | cpp = cpp + 0.846*gfrac(igas) |
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| 34 | mugaz = mugaz + 44.01*gfrac(igas) |
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| 35 | elseif(gnom(igas).eq.'N2_')then |
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| 36 | cpp = cpp + 1.040*gfrac(igas) |
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| 37 | mugaz = mugaz + 28.01*gfrac(igas) |
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| 38 | elseif(gnom(igas).eq.'H2_')then |
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| 39 | cpp = cpp + 14.31*gfrac(igas) |
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| 40 | mugaz = mugaz + 2.01*gfrac(igas) |
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| 41 | elseif(gnom(igas).eq.'H2O')then |
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| 42 | cpp = cpp + 1.864*gfrac(igas) |
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| 43 | mugaz = mugaz + 18.02*gfrac(igas) |
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| 44 | elseif(gnom(igas).eq.'CH4')then |
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| 45 | cpp = cpp + 2.226*gfrac(igas) |
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| 46 | mugaz = mugaz + 16.04*gfrac(igas) |
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| 47 | elseif(gnom(igas).eq.'NH3')then |
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| 48 | cpp = cpp + 2.175*gfrac(igas) |
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| 49 | mugaz = mugaz + 17.03*gfrac(igas) |
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| 50 | print*,'WARNING, cpp for NH3 may be for liquid' |
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| 51 | else |
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| 52 | print*,'Error in calc_cpp_mugaz: Gas species not recognised!' |
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| 53 | call abort |
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| 54 | endif |
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| 55 | endif |
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| 56 | |
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| 57 | enddo |
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| 58 | |
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| 59 | cpp=1000.0*cpp |
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| 60 | |
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| 61 | print*,'Cp in calc_cpp_mugaz is ',cpp,'J kg^-1 K^-1' |
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| 62 | print*,'Mg in calc_cpp_mugaz is ',mugaz,'amu' |
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| 63 | |
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| 64 | R = 8.314511E+0 *1000.E+0/mugaz |
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| 65 | rcp = R/cpp |
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| 66 | |
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| 67 | return |
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| 68 | end subroutine calc_cpp_mugaz |
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