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Thermal Conductivities of Metals

Thermal Conductivities of Metals

The thermal conductivity of a given material varies with temperature, and the mean thermal conductivity is defined by

${\displaystyle k_m=\frac{1}{t_0^{\prime }-<!--\; -\; -->t_i^{\prime }}{\int <!--\; \int \; -->}_{t_0^{\prime }}^{t_i^{\prime }}kdt}$

Over moderate range, k varies linearly with t, and hence km is the value of k at the arithmetic mean of t'_i and t'₀

k = Btu / h · ft · °F
k_t = K_to - a ( t - t_o )

Sources:

Source:

McAdams, ‘‘Heat Transmission,’’ McGraw-Hill. Eckert and Drake, ‘‘Analysis of Heat and Mass Transfer,’’ McGraw-Hill. Carslaw and Jaeger, ‘‘Conduction of Heat in Solids,’’ Oxford. Jakob, ‘‘Heat Transfer,’’ vols. I and II, Wiley. Kays and Crawford, ‘‘Convective Heat and Mass Transfer,’’ 3d ed., McGraw-Hill. Wilkes, ‘‘Heat Insulation,’’ Wiley. Kays and London, ‘‘Compact Heat Exchangers,’’ McGraw-Hill. ‘‘Thermophysical Properties Data Book,’’ Purdue University.

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