WILLIS H. CARRIER
1349
It may be shown thermodynamically, assuming steam to be a perfect gas. that
[45]
89This may also be demonstrated approximately for the range of temperatures under discussion by computation from the values given in the steam tables of Marks and Davis, as in Table 6:
TABLE 6 COMPARISON OF ACTUAL VALUES OF WITH VALUES OF COMPUTED FROM THE TOTAL HEAT AT DIFFERENT TEMPERATURES | ||||||
(Computed) | ||||||
80 | 70 | 0.44365 | 1090.2 | 48.03 | 1046 | .70 |
80 | 60 | 0.44356 | 1085.9 | 48.03 | 1046 | .74 |
80 | 50 | 0.44347 | 2081.4 | 48.03 | 1046 | .78 |
80 | 40 | 0.44347 | 1076.9 | 48.03 | 1046 | .5 |
100 | 90 | 1099.2 | 0.44401 | 67.97 | 1035 | .67 |
100 | 80 | 0.44392 | 1094.8 | 67.97 | 1035 | .7 |
100 | 70 | 0.44383 | 1090.8 | 67.97 | 1035 | .64 |
100 | 60 | 0.44374 | 1085.9 | 67.97 | 1035 | .67 |
100 | 50 | 0.44365 | 1081.4 | 67.97 | 1035 | .81 |
100 | 40 | 0.44356 | 1076.9 | 67.97 | 1035 | .54 |
120 | 110 | 0.44419 | 1108.0 | 87.91 | 1024 | .4 |
120 | 100 | 0.44410 | 1103.6 | 87.91 | 1024 | .57 |
120 | 90 | 0.44401 | 1099.2 | 87.91 | 1024 | .52 |
120 | 80 | 0.44392 | 1094.4 | 87.91 | 1024 | .64 |
120 | 70 | 0.44383 | 1090.3 | 87.91 | 1024 | .58 |
120 | 60 | 0.44374 | 1085.9 | 87.91 | 1024 | .50 |
120 | 50 | 0.44365 | 1081.4 | 87.91 | 1024 | .54 |
120 | 40 | 0.44356 | 1076.9 | 87.91 | 1024 | .47 |
or |
Hence substituting in equation [43]
[46]
[47]
[48]