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DESIGN  OF OPEN-HEARTH FURNACES

299

TABLE 20ŚContinued
Base Data:

Qog = volume of gas burned per second = 5 m3 32 = 188 cu ft.
Qowg = volume of products of combustion with 40 per cent excess air
= 12m3 77 =451 cu ft.

Temperatures, initial,
	C .........
	600░
	700░
	800░
	900░


	F
	1112░
	1292░
	1472░
	1652░

Gas factor 1-f-ai
	
	3 20
	3 57
	3 94
	4 30

Temperatures, final,
	C
	250░
	300░
	350░
	400░

Gas factor, 1-j-ai. . . .
	F .........
	482░ 1 92
	572░ 2 10
	662░ 2 28
	752░ 2 47


	
	
	
	
	

Heat capacity of products of combustion from curve for producer gas,
SC-DSW, Fig. 184:

Calories initial
	2 814
	3400
	3814
	4336

B t u
	11,168
	13492
	15,134
	17206

Calories final .....       .......
	1,144
	1,383
	1,622
	1846

Btu                .................
	4,540
	5,488
	6,337
	7326

Volumes initial, m3    . . . . .......
	40 87
	45 59
	50 31
	54 911

cubic feet
	1 443
	1 610
	1 777
	1 939

Volumes final   m3
	24 52
	26 82
	29 11
	31 54

cubic feet ........
	866
	947
	1,028
	1,114