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Industrial Sizing
Guide Lines
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Continuous Steel Quenches
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Batch Steel Quenches
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Heat Removal (BTU/HR) = M x 0.13 x (T¹ - T²)
M = Throughput Rate (LBS/HR)
T¹ = Steel Temperature into Quench (ºF)
T² = Steel Temperature Out of Quench (ºF)
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Heat Removal (BTU/HR) = M x 0.13 x (T¹ -
T²)
t
M = Maximum Quench Load (LBS)
T¹ = Steel Temperature into Quench (ºF)
T² = Steel Temperature Out of Quench (ºF)
t=Quench Time (HRS)
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Resistance
Welding
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Transformer - Transformer KVA x 3413 x .03 = BTU/HR
Welding Tips - 3,000 BTU/HR Per Tip (Chilled Water Preferably)
Ignitron Tube Size
B
1,800 BTU/HR
Size
C
4,500 BTU/HR
Size
D
24, 000 BTU/HR
Size
E
48,600 BTU/HR
Rectifier (If Required) - AMPS x 3.413 = BTU/HR
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Plating
Baths
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Heat Removal (BTU/HR) = DC AMPS x DC Volts x
2.56 |
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Die
Casting
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Zinc
Heat Removal (BTU/HR) = M
x 95 BTU/LB
m = Throughput Rate (LBS/HR)
Pour at 800 ° F Remove at 300 ° F
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Aluminum
Heat Removal (BTU/HR) = M
x 325 BTU/LB
m = Throughput Rate (LBS/HR)
Pour at 1200 ° F Remove at 600 ° F
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Heat
Exchangers |
General
Heat Transfer |
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BTU/hr=U Factor x Area x
∆T
U Factors:
-
Shell/tube: (H2O/H2O)=250
(Oil/H2O)=150
- Tank: Plate Coil = 100
Coil in Tank = 80
- Plate & Frame:(H2O/H2O) = 1,000
∆T - Set Temperature - cooling Water |
BTU=Cx ∆TxM
where:
- C = specific Heat of Material
-
∆T=Temperature Change
- M=Mass of Material Processed
(lbs or lbs/hr)
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Other
Equipment
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Air Compressor (No After cooler)
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= 0.16 TON/HP
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Air Compressor (With After cooler)
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= 0.2 TON/HP
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Vacuum Pump
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= 0.212TON/HP
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Hydraulics
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= 0.212 TON/HP
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Machine Tools
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= 0.212 TON/HP
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Nominal
Design Parameters
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 Chillers: 2.4
GPM/TON
12,000 BTU/HR/TON
20° F - 60 ° F Supply Range
85 ° F Water Cooled
95 ° F Air
Cooled
50 ° F Supply
60 ° F Return
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 Towers: 3 GPM/TON
15,000
BTU/HR/TON
78 ° F WET BULB
95 ° F EWT
85 ° F EWT
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