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The document of electric heating
Common designing chart
While the project calculating and choice for heater, it is often come down to the date in common use, for example: medium surface heat loss, medium temperature change under the various conditions. In order to avoid the unnecessary damage for the medium capability and heat element while the heater working, following chart is just for reference.
1. The choice for the wattage density while force convection(Air,Ambient Temp.20℃)
  Outlet Temp.℃
Outlet flow rate m/min
2. water surface heat loss(Ambient Temp.20℃)
  Heat loss kW/m2
Surface Temp. ℃
3. Heat loss of oil or wax surface(Ambient Temp.20℃)
  Heat loss kW/m2
surface Temp.℃

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