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# Heating of copper wire... - RF Cafe Forums

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oz7acs
 Post subject: Heating of copper wire... Posted: Thu Jul 26, 2007 9:58 am
 Captain

Joined: Thu Jul 26, 2007 9:25 am
Posts: 5
Location: Roskilde, Denmark
Hi again out there
As far as I could find in my physics book the heating of a copper wire with known weight from its diameter and length, a known applied power and time will be: dT = (P*t)/(m*c) and T1 = T0 + dT
Example:
P=1W, t=3600s (60min), m=1kg, T0=25 degC and c=387 J/(Kg*K) gives
dT = 9.3 and T1=34.3 degC.
Fine, but what if one has to account for the heat conductance and heat radiation from the wire (natural air cooling) - then what will the final temperature be in degrees Celcius?

_________________
Best regards and
Vy 73 de OZ7ACS aka JPH

nubbage
 Post subject: Posted: Wed Aug 01, 2007 5:07 am
 General

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 236
Location: London UK
Hi jph
One site I found has a lot of physics thermal on-line calculators run in java, one of which might help you.
The site is www.martindalecenter.com
http://www.martindalecenter.com

73