How is the heat exchange area of an electric heater calculated? !

The Heat Exchanger Master can handle it; there are dedicated articles available online.

Oh, which article is it? Could you share it? Thank you. . . . .

Simply put, you specify the operating temperature on the surface of the resistance wire. For ordinary electric heaters, the resistance wires have a surface temperature of 100–600 °C during operation; you should decide based on the specific circumstances. Example: Using an electric heater to heat air from 20 ℃ to 140 ℃, with the surface temperature of the resistance wire set at 180 ℃, simulated and calculated using Heat Exchanger Master. Heat exchanger master settings: Shell side: Air flows through the shell side; settings are set according to conventional practices ； Governing mechanism: A 1-governing-mechanism unit with 10 kilograms of saturated steam is used in place of the resistance wire, and its temperature is exactly 180°C. In this way, the heat exchanger can be designed properly. Finally, the heat Q (i.e., the power of the electric heater) is converted into a length for the resistance wire, which is then distributed evenly inside the heat exchange tube.

Okay, that’s professional enough. Thank you. . . .

The last edit to this post was made by wiseboy on 2015-7-11 at 18:38. Another advantage of this method for simulating electric heaters used in heat exchangers is that the surface temperature of the resistance wire can be controlled, as well as its lifespan. For example, in the case mentioned above, the surface temperature of the resistance wire is 180 °C under normal conditions, and this method has been adopted by several manufacturers. The person who first invented this method was a genius from Yangzhou; he found that its effectiveness was very good, even better than that of some professional electric heating systems. From then on, the expert in heat exchangers entered the community of electric heater users. These days, many electric heater manufacturers have purchased Heat Exchanger Master.

“The normal surface temperature of the resistance wire is 180 ℃; it should be 600 degrees, right?

What I mean is that in this well-designed heat exchanger, the surface temperature of the resistance wire is 180 ℃ under normal operation.

Okay, actually, our fluid reaches over 300 degrees after passing through the electric heater! ! !

Your over 300 degrees are your problem. Not the whole world is at 300 degrees like you. I’m just giving examples; you need to be clear in your thinking.

Hehe, thanks. . . . . .