Express the following geometry in terms of a an equivalent thermal circuit.
Alternatively :
where U is the overall heat transfer coefficient and DT the overall temperature difference.
Other Composite Walls
(a) Surfaces normal to the x-direction are isothermal
(b) Surfaces parallel to x-direction are adiabatic
Note :
For resistances in series : Rtot=R1+R2+…+Rn
For resistances in parallel : (1/Rtot)=1/R1+1/R2+…+1/Rn
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