# Full text of "The Flow Of Gases In Furnaces"

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```DESIGN OF OPEN-HEARTH  FURNACES

281

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

Pressures required for impressing velocity and velocity changes upon flowing gases in kg per m2 or mm of water:  8 = Uptakes ............
2 199
1 319
3 111
1 254

Cinder pockets ............            ....

0 495
0 543

Necks 0.525-0.498= ............

0 027

Chamber above checkerwork .........
0 462
0 498

0.657-0.495= ..................

0.162

Checkerwork ...........            .   .
0 049
0 047
0 072
0 052

Flues below checkerwork ...........

0 916
0.570

0 590-0 512 =
0 078

0.460-0.268= ..................

0.192

Fantails ...............              ....
0 512
0 268

8 total between valves and ports, kg per m2 or nun of water. . .        .              .   .
3 300
2 351
4 756
2 419

The friction losses = 7 in kg per in2 between the valves and the ports are: Uptakes    .............              .   .
0 360
0 300
0 411
0 274

Cinder pockets
0 129
0 144
0 147
0 144

Necks
0 129
0 144
0 147
0 144

Chamber above checkerwork
0 048
0 048
0 055
0 043

Checkerwork ...................
1 802
1 987
2 064
1 808

Flues below checkerwork ............
0.553
0 548
0 632
0 554

Fantaiis .............................
0.320
0 383
0.338
0 359

7 total between valves and ports, kg per m2 or mm of water ...................
3 341
3 554
3 794
3 326

Valve resistance 5 = kg per m2 ............
4.201
2 317
6.216
4.781

5 = velocity pressures between valves and ports         ..........
3 300
2 351
'4 756
2 419

7 = friction losses between valves and ports
3.341
3.554
3.794
3.326

Summation, kg per m2 or mm of water . . Chimney effect of checkerwork, uptakes, etc.
10.842 12.851
8.222 10.683
14.766 13.217
10.526 12.990

Chimney effect available for port velocity, kg per rn2 or rnm of water
2 009
2 461

Draft   depression   required   at   reversing valves, kg per in2 or rnm of water  ....

27.983
23.516

```