318
APPENDIX VIII
TABLE ^Continued
COMBUSTION OF BLAST FURNACE GASCOMPUTATION SHEET 3
Computation for curves showing the effects of preheat upon calorific in-
tensity. Values from Sheets 1 and 2.
Temperature of Preheat
0°
200°
400°
600°
800°
Calories released by gas at 0° ..... (A)
1861
Added to gas by preheat (I?)
144
296
456
622
Preheated gas (A -j- J5) ........... S
2005
2157
2317
2483
Added by air preheat 100% ...... (C)
94
191
292
394
Preheated air (A-\-C) ........... (D}
1955
2052
2153
2257
Preheat gas and air (D-h-S) ...... £
2099
2348
2609
2879
Added by air preheat 120% ...... (J?)
113
229
350
473
Preheated air (A-+E] ........... (F)
1974
2090
2211
2334
Preheated gas and air (.F-KB) . . . . S
-----
2118
2384
2667
2956
Added by air preheat 140 % ...... ((?)
132
267
409
552
Preheated air (A+G) ........... (//)
1993
2128
2270
2413
Preheated air and gas f/7-f j?) ___ 2
2137
.2424
2726
3035
Added by air preheat 180% . (K)
170
344
526
710
Preheated air (A+K) ........... (L)
2031
2205
2387
2571
Preheated air and gas (L-f B) . . . . 2
2175
2501
2843
3193
The values marked S, D, F, H, L are spotted upon the heat capacity
curves for their corresponding air supplies, and curves are drawn through
these points which enable certain approximations to be made in. regard to
other air supplies and temperatures of preheat.