Overall Heat Transfer Coefficient U Calculator

U from convection and wall conduction resistances

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Overall Heat Transfer Coefficient U

U from convection and wall conduction resistances

$$\frac{1}{U} = \frac{1}{h_i} + \frac{t}{k} + \frac{1}{h_o}$$

Flat-wall approximation. For cylindrical walls use log-mean area. Add fouling: $1/U = 1/h_i + R_{f,i} + t/k + R_{f,o} + 1/h_o$.

h_i (W/m²·K)

h_o (W/m²·K)

k_wall (W/m·K)

Wall thickness t (m)

All fields required and nonzero.

Overall Coefficient U

—W/m²·K

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