MadSci Network: Physics

Subject: Is there a heat coil equilibrium point?

Date: Thu Feb 27 06:28:28 2003
Posted by Alan McNea
Grade level: undergrad School: ACC
City: Houston State/Province: TX Country: US
Area of science: Physics
ID: 1046345308.Ph

I wish to construct a heat coil that reaches and stays at a temp. of 160 deg C. 
I was wondering if this is possible, and if so what equations I could use to 
help figure this out, I know that h = (i^2)rt, but by this equation the coil 
will continue to increase in heat over time.  However, I see coils heated for 
extended periods of time and they don't melt, so I assume at some point an 
equilibrum occurs.  If so how can I set that Equilibrium temp?  I would prefer 
to use DC since AC varies slightly depending upon your outlet, unless this 
change wouldn't matter.

Re: Is there a heat coil equilibrium point?

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