Page 154 - Mechanical Engineer's Data Handbook
P. 154

THERMODYNAMICS AND HEAT TRANSFER                                                 143

         Rich mixture

                 (32p+8q-  16r)
         R, = 4.292
                 (12p+q+  16r)



                                            4
                                       y=x+-
                                            2


         Combustion products (% volume)




         Wet analysis              U               b                           37 600n
                                 100-           100-
                                                                                  Y
                                   Y               Y            Y               M,
         Dry analysis               a              b                           37 600n
                                 100-           100 -          0
                                   X               X                            Msx


         3.16.7   Gaseous fuels

         For a mixture of gases such as H,,  0,, CO, CH,,  etc.,
         let  V,, V,,  V3, etc., be  the percentage by  volume of
         gases, 1,2,3, etc., containing C, H, and 0,. and V,
                                          V,
         are the percentage volumes of  N,  and CO,.
         Let:
         c,, c2, c3, etc. = the number of  atoms of  carbon in each gas
         h,,  h,,  h,,  etc.=the  number of  atoms of  hydrogen in each gas
         ol, o,,  03, etc. = the number of  atoms of  oxygen in each gas
         And let:
         S,=c,V,+c,V,+.  . .
         Sh=h,V,+h,V,+.   , .
         S,=o,V,+o,V,+.  . .

               'h
         k = S, + - + -
               4   2
         Then:
         R,=--; k  R=R,(i+k)
            21
                 so  Sh
         x= 100R+---+   V"
                  2  4
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