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DESIGN OF  OPEN-HEARTH FURNACES

297

TABLE 20

Temperature, Degrees C.
			Volume of Waste Gas, Cubic Meters
			Heat Available, Calorics per Second
		
Initial
	Final
	Drop
	Initial
	Final
	Change
	Initial
	Final
	in Boiler
 2490

900
	400
	500
	54.91
	31.54
	23 . 37
	4330
	1846
	

	350
	550
	
	29.11
	25 . 80
	
	1622
	2714


	300
	600
	
	20.82
	28.09
	
	1383
	2953


	250
	650
	
	24.52
	30.39
	
	1144
	3192

800
	400
	400
	50.31
	31.54
	18 . 77
	3814
	1846
	1968


	350
	450
	
	29.1.1
	22.20
	
	1622
	2192


	300
	500
	
	26.82
	23 . 40
	
	1383
	2-131


	250
	550
	
	24.52
	25 . 79
	
	1144
	2070

700
	400
	300
	45 . 59
	31 . 54
	14.05
	3400
	1840
	1554


	350
	350
	
	29.11
	10.48
	
	1622
	1778


	300
	400
	
	26.82
	18.77
	
	1383
	2017


	250
	450
	
	24.52
	21.07
	
	1 144
	2256

600
	400
	200
	40.87
	31 . 54
	9 . 33
	2814
	1846
	008


	350
	250
	
	29.11
	1 1 . 76
	
	1622
	111)2


	300
	300
	
	26.82
	14.05
	
	1383
	143!


	250
	350
	
	24.52
	10.35
	
	1M4
	1670