THERMAL RESISTANCE

 THERMAL RESISTANCE 

Observation indicate that in systems flow of fluid, heat and electricity, the flow quantity is directly proportional to the driving potential and inversely proportional to the flow resistance, In hydraulic circuit the pressure along the path is the driving potential and roughness of the pipes is the flow resistance. The current flow in a conductor is governed by the voltage potential and electrical resistance of the material. Likewise, temperature difference constitutes the driving force for heat conduction through a medium.


Obviously there is a one-one correspondence between the flow of electric current and heat.

  • Electric current is analogous to thermal heat flow rate.
  • Electric voltage correspondence to thermal temperature difference .
  • Electric resistance is analogous to quantity dx/KA. This quantity is called thermal resistance.




THIS ARTICLE WAS TAKEN BY HEAT AND MASS TRANSFER BOOK 

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