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

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APPENDIX VII

Gas Checker
Aii-Checker

Flues below checkerwork and walls : Chamber width .
3 m 483
5 m 763

Number of 115-mm walls                             .       .....
5
9

Number of 465-mm flues .........................
6
10

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

Fractional resistance in flues below checker work: t° = temp. below checkerwork. . .
l-\-cd =
500°
2 835
300° 2 101
800° 3 936
600° 3 202

Qo
5m3   32
8 m3   51
5 m3   19
7m3   58

15m3   08
17m3   88
20m3   43
24m3  27

B — width of flues total
2 m 790
4m 650
2 m 790
4m 650

H = height of flues
1 m 000

Total length of chamber
7m 663

The resistance to flow is about equivalent to the full volume for one-third of the length L =
2.554

S= perimeter of flues, total. . .
17.580
29.300

65 = area of flues, total ........
2.790
4 650

SL = exposed surface m2 .......
44.90
74.83

16.09
16 09

AQ = specific weight gas
1 125
1 293
1 32
1 32

At=AQ~(l+at) =kg per m3. . .
0.397 5 404
0.615 3 84
0.335
7 324
0.412 5 22

Y/= friction loss in kg per m2 = 0.016X16.09X5.404X0.397 =
0 kg 553

0.016X16.09X3.840X0.615 =

0 kg 548

0 016X16 09X7 324X0 335 =

0 kg 632

0.016X16.09X5.220X0 412 =

0 kg 554

The pressures requisite to impress their velocity on the gases in the flues below the checker-work: d=At(vt2+2g) =kg per m2= . . .
0.590
0.460
0.916
0.570

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