Calculating Wire Temperature is Not Complicated (nichrome example)
This is the first video in my new Wire Design Series. I chose nichrome wire as the example to show how nichrome wire temperature can be calculated using a spreadsheet and using heat transfer equations. I also provide a chart for the convection coefficient (h) and emissivity values. The convection coefficient graph is designed for small wire calculations. The emissivity graph is specific to nichrome.
Corrections:
In the video, A is the surface area of the wire. I think I overlooked explaining that. Also, I mention that dimmer switches cannot adjust for 4mA. While true, the math I should have stated 40mA to match the example in the video. Still, regulating 40mA with a dimmer switch to adjust nichrome temperature is still a challenge for most dimmer switches. Of course, the voltage of the transformer has a lot to do with it also.
The graph that I show is a product of my own research. If you want a copy, you will need to take a screen shot.
Original Work, Copyright 2018 James D. Whiteside, II all rights reserved, For consideration only, no reproduction without prior permission.
