| |
The Document of Electric Heating Designing
|
|
| |
|
|
|
|
|
| Common designing chart |
| |
While the project calculating and choice for heater, it is often come down to the date, |
| for example: medium surface heat losing, medium temperature change under the various working. |
| conditions.In order to avoid the unnecessary damage for the medium capability and heat |
| element while the heater working, following chart just for reference. |
| |
| 1、The choice for the power density while force convection（Air，Environment Temp.20℃） |
| |
Outlet Temp.℃ |
|
|
|
|
|
 |
| |
|
|
|
|
|
Outlet flowing |
| 2、Water surface heat losing（Environment Temp.20℃） |
| |
Heating losing |
|
kW/m2 |
|
|
|
 |
| |
|
|
|
|
|
Surface Temp. ℃ |
| 3、Heat losing of oil or wax surface（Environment Temp.20℃） |
| |
Heat losing |
|
kW/m2 |
|
|
|
 |
| |
|
|
|
|
|
surface Temp. ℃ |
| 4、Heat losing for dissolve metal surface（Aluminium alloy、Tin，Environment Temp.20℃） |
| |
Heat losing |
|
kW/m2 |
|
|
|
 |
| |
|
|
|
|
|
Surface Temp. ℃ |
| 5、Heat losing for surface of china fiber （64kg/m3，Environment Temp.20℃） |
| |
Heat losing |
|
kW/m2 |
|
|
|
 |
| |
|
|
|
|
|
Surface temp. |
| 6、Heat losing for the surface of steel without warm-keeping （Environment Temp.20℃） |
| |
Heat losing |
|
kW/m2 |
|
|
|
 |
| |
|
|
|
|
|
Surface Temp.℃ |
| 7、The changes of environment and tube surface temp under nature convection（φ12Tube Dia） |
| |
Tube surface temp℃ |
|
|
|
 |
| |
|
|
|
|
|
Outlet folw m/min |
| |
|
|
|
共3/3页
1 2 3 |
