1. Steady-state heat transfer

1.1 Heat loss

Let's consider an insulated pipe and its characteristics defined in figure 1 .

We have the following relationships: $\begin{matrix} P = α_{i} \cdot 2 π R_{i} (T - t_{1}) \\ = α \cdot 2 π (R_{e} + e) (t - t_{a}) \\ = \frac{2 {πλ}_{m} (t_{1} - t_{2})}{\ln} \end{matrix}$

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Steady-state heat transfer

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Optimum insulation thickness

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References

(1) - ASME Boiler and Pressure Vessel Code. - Section III-Div. 1, Ed. Nuclear Power Plant Components, Amer. Soc. Mechan. Eng (1974).
(2) - American National Standard Code for Pressure Piping, Power Piping. - ANSI B 31.1 (1973) with Addenda through B 31.1 f,...

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