Heat transfer coefficient for condensation - Pure vapors on solid surface

Input(s)

k: Thermal Conductivity (J/msK)(\mathrm{J} / \mathrm{m} \mathrm{s} \mathrm{K})

ρ\rho: Density (g/cc)(\mathrm{g} / \mathrm{cc})

g: Acceleration Due to Gravity (m/s2)\left(\mathrm{m} / \mathrm{s}^{2}\right)

μ\mu: Viscosity (cP)(\mathrm{cP})

D: Diameter (m)(\mathrm{m})

TdT_{d}: Dew Point Temperature (K)

ToT_{o}: Original Temperature (K)

ΔHvap :\Delta H_{\text {vap }}: Heat of Vaporization (Jft2/s2)\left(\mathrm{J} \mathrm{ft}^{2} / \mathrm{s}^{2}\right)

Output(s)

hmh_{m}: Heat Transfer Coefficient (W/mK)(\mathrm{W} / \mathrm{m} \mathrm{K})

Formula(s)

hm=0.725((k3)(ρ2) gΔHvapμD( TdTo))0.25\mathrm{h}_{\mathrm{m}}=0.725 *\left(\frac{\left(\mathrm{k}^{3}\right) *\left(\rho^{2}\right) * \mathrm{~g} * \Delta \mathrm{H}_{\mathrm{vap}}}{\mu * \mathrm{D} *\left(\mathrm{~T}_{\mathrm{d}}-\mathrm{T}_{\mathrm{o}}\right)}\right)^{0.25}

Reference(s)

Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons, Chapter: 14, Page: 447.

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