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Reference DataHeat Loss Factorsand GraphsContinuedTemperature of Surface—°F600500400300200100Combined Convection and Radiation—Losses from Oil or Paraffin Surfaces0 0100 200 300 400 500 600 700 800 900 1000 1100 1200 1300Losses—W/ft 23.5Wind Velocity Effects on Exposed, Bare and Insulated SurfacesHow to Use:1. Calculate surface heat losses at still airconditions2. Multiply result by proper wind correctionfactor from the curves below to determinetotal heat lossesWind Velocity Correction Factor3.02.52.01.535302520151052.5Wind Velocity—MPH1.0100 200 300 400 500 600 700Temperature Difference Between Exposed Surface and Air—°F (∆ T)400
W A T L O WReference DataQuick Estimates ofWattage RequirementsThe following tables can be usedto make quick estimates of wattagerequirements.For Steel:Use table or metric equation.kW = Kilograms x Temperature Rise (°C)5040 x Heat-up Time (hrs.)kW = Pounds x Temperature Rise (°F)20,000 x Heat-up Time (hrs.)Kilowatt-Hours to Heat Steel*Temperature Rise °FAmountof Steel 50° 100° 200° 300° 400° 500° 600°(lbs.)Kilowatts to Heat in One Hour25 0.06 0.12 0.25 .37 0.50 0.65 0.7550 0.12 0.25 0.50 .75 1.00 1.25 1.50100 0.25 0.50 1.00 1.50 2.00 2.50 3.00150 0.37 0.75 1.50 2.25 3.00 3.75 4.50200 0.50 1.00 2.00 3.00 4.00 5.00 6.00250 0.65 1.25 2.50 3.75 5.00 6.25 7.50300 0.75 1.50 3.00 4.50 6.00 7.50 9.00400 1.00 2.00 4.00 6.00 8.00 10.00 12.00500 1.25 2.50 5.00 7.50 10.00 12.50 15.00600 1.50 3.00 6.00 9.00 12.00 15.00 18.00700 1.75 3.50 7.00 10.50 14.00 17.50 21.00800 2.00 4.00 8.00 12.00 16.00 20.00 24.00900 2.25 4.50 9.00 13.50 18.00 22.50 27.001000 2.50 5.00 10.00 15.00 20.00 25.00 30.00* Read across in table from nearest amountin pounds of steel to desired temperature risecolumn and note kilowatts to heat in one hour.Includes a 40 percent safety factor to<strong>com</strong>pensate for high heat losses and/or lowpower voltage.For Oil:Use equation or table.kW = Gallons x Temperature Rise (°F)800 x Heat-up time (hrs.)ORkW = Liters x Temperature Rise (°C)1680 x Heat-up time (hrs.)1 cu. ft. = 7.49 gallonsKilowatt-Hours to Heat Oil*Amount of OilCubicFeetTemperature Rise °FGallons 50° 100° 200° 300° 400° 500°0.5 3.74 0.3 0.5 1 2 2 31.0 7.48 0.5 1.0 2 3 4 62.0 14.96 1.0 1.0 2 4 6 113.0 22.25 2.0 3.0 6 9 12 164.0 29.9 2.0 4.0 8 12 16 225.0 37.4 3.0 4.0 9 15 20 2510.0 74.8 5.0 9.0 18 29 40 5215.0 112.5 7.0 14.0 28 44 60 7720.0 149.6 9.0 18.0 37 58 80 10225.0 187 11.0 22.0 46 72 100 12730.0 222.5 13.0 27.0 56 86 120 15135.0 252 16.0 31.0 65 100 139 17640.0 299 18.0 36.0 74 115 158 20145.0 336.5 20.0 40.0 84 129 178 22650.0 374 22.0 45.0 93 144 197 25255.0 412 25.0 49.0 102 158 217 27660.0 449 27.0 54.0 112 172 236 30265.0 486 29.0 58.0 121 186 255 32670.0 524 32.0 62.0 130 200 275 35075.0 562 34.0 67.0 140 215 294 375* Read across in table from nearest Add 5 percent for uninsulated tanks.amount in gallons of liquids todesired temperature rise column andnote kilowatts to heat in one hour.Resources and InformationReference Data401
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W A T L O WTable of ContentsThe pro
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W A T L O WIndustry SegmentOverview
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Barrel Hea
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Hot RunnerNozzle Heaters</s
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Tubular/ImmersionOEM Cross Referenc
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Tubular/ImmersionProblem SolversWat
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Temperature SensorsThermocouplesSpr
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Temperature SensorsThermocouplesRig
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Temperature SensorsThermocouplesMin
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W A T L O WPower ControllersDIN-A-M
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W A T L O WPower ControllersStyle B
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W A T L O WPower ControllersStyle C
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W A T L O WPower ControllersSystem
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W A T L O WPower ControllersE-SAFE
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W A T L O WPower ControllersSERIES
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W A T L O WPower ControllersSolid S
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W A T L O WDie and FormerHe
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Temperature SensorsRaytek ® Family
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Temperature SensorsCase HistoriesGr
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TemperatureControllers4-, 8-, 16-Lo
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TemperatureControllers4-, 8-, 16-Lo
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TemperatureControllersCPC400Specifi
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TemperatureControllersCPC400Orderin
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TemperatureControllers16-, 32-LoopM
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TemperatureControllersPPC-2000PPC-2
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TemperatureControllersSERIES F4SSet
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TemperatureControllersANAWIN ® 3 H
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TemperatureControllersProblem Solve
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W A T L O WPower ControllersE-SAFE
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W A T L O W• Next day shipment on
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ThermoformingHeaters</stron
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TemperatureControllersFor c
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TemperatureControllersSERIES D8Spec
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TemperatureControllersSERIES PDSing
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TemperatureControllersProblem Solve
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Page 374 and 375: CapabilitiesSystem Integration• N
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Barrel Heaters - Hasmak.com.tr

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