THERMAL TECH EQUIPMENTCo. Inc. 
   "SOLUTIONS FOR THE PLASTICS INDUSTRY"
   

Industrial Sizing Guide Lines

Continuous Steel Quenches Batch Steel Quenches

 Heat Removal (BTU/HR) = M x 0.13 x (T - T)
 M = Throughput Rate (LBS/HR)
 T = Steel Temperature into Quench (F)
 T = Steel Temperature Out of Quench (F)

 Heat Removal (BTU/HR) = M x 0.13 x (T - T)
                                                  t
 M = Maximum Quench Load (LBS)
 T = Steel Temperature into Quench (F)
 T = Steel Temperature Out of Quench (F)
  t=Quench Time (HRS)

Resistance Welding

                    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

Plating Baths

Heat Removal (BTU/HR) = DC AMPS x DC Volts x 2.56

Die Casting

                              Zinc
 Heat Removal (BTU/HR) = M x 95 BTU/LB
 m = Throughput Rate (LBS/HR)
 Pour at 800 F       Remove at 300 F

                     Aluminum
 Heat Removal (BTU/HR) = M x 325 BTU/LB
 m = Throughput Rate (LBS/HR)
 Pour at 1200 F       Remove at 600 F

Heat Exchangers

General Heat Transfer

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)

Other Equipment

Air Compressor (No After cooler)    = 0.16 TON/HP
Air Compressor (With After cooler)    = 0.2 TON/HP
Vacuum Pump    = 0.212TON/HP
Hydraulics    = 0.212 TON/HP
Machine Tools    = 0.212 TON/HP

Nominal Design Parameters

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 

Towers:  3 GPM/TON  
      15,000 BTU/HR/TON     
      78 F WET BULB
      95 F EWT
      85 F EWT                                        
 

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  Rick White
  Mobile:(816) 289-1958
 2704 NE 78th Street, Kansas City, MO 64119
  T:(816)468-7577  F:(816)468-7555