Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 9 (Q.No. 43)
43.
The units of resistance to heat transfer is
Discussion:
3 comments Page 1 of 1.
Pawan Kumar Sharma said:
2 years ago
Resistance to heat transfer is = Fouling Factor (m^2.K)/W.
(1)
Shekhar singh said:
2 years ago
Resistance to heat transfer is inversely proportional to conductance so the conductance unit is w/k then the resistance unit is k/w.
Am I correct? Anyone, please clarify me.
Am I correct? Anyone, please clarify me.
Alpesh solanki said:
9 years ago
For conductive heat transfer the resistance is;
x/(kA)
x = wall thickness = m(unit),
k = thermal conductivity = w/(m*K),
A = area = m^2.
Then,
Resistance = (w^-1) * k.
For convective heat transfer q = hA(dT),
Resistance = 1/(hA),
h=heat transfer co eff = w/m^2 * k.
A = m2
Then,
Resistance = w^-1 *k.
x/(kA)
x = wall thickness = m(unit),
k = thermal conductivity = w/(m*K),
A = area = m^2.
Then,
Resistance = (w^-1) * k.
For convective heat transfer q = hA(dT),
Resistance = 1/(hA),
h=heat transfer co eff = w/m^2 * k.
A = m2
Then,
Resistance = w^-1 *k.
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