The Flow Of Gases In Furnaces

262

APPENDIX VII
TABLE 16

Gas on Gas
Air on
Air
Gas on Waste
Gas
Air on Waste Gas

Calories available for gas checker 2035X0.3619= ...........

736

Calories available for air checker 2035X0 6381 =

1299

Percentages for air and gas: 736-f- 921 =

79 91

1299-f-1114 =

116 61

Correction to make sum 200 .....

1 41
2 07

Corrected values

81 32
118 68

Reducing to 100% basis .....

40 66
59 34

Calories per cubic meter of gas burned- 921X0 4066= .

374

1114X0.5934= .......

661

Calories required by preheat .....
279
492

Volumes of gas, air supply and products of combustion: Gas at 0° 760 mm ............
5 m332

Air at 0° 760mm ............

8m3 51

Products of combustion: 12.77X0.4066= ...........

5m3 19

12.77X0.5934= ...........

7 m358

Calories per second required: 5.32X279= .................
(188 cu ft ' 1484
(300 cu ft)
(181 cuft)
(270 cuft)

5.32X492= .................

2618

5.32X374= ..............

1990

5.32X661 = ...............

3516

Calories per cycle: 15 minute = 900 seconds
1,335,COO

1,791 000

20 minute = 1200 seconds ......
1,781,000
2,356,000
2,388,000
3,164,000

25 minute = 1500 seconds ......
2,226,000
3,141,000
2 985 000
4,219,000

3,627,000

4,974,000