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Heat transfer at gas evolving electrodes

โœ Scribed by Helmut Vogt

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
383 KB
Volume
23
Category
Article
ISSN
0013-4686

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โœฆ Synopsis

The outlines of an available concept for heat transfer at gas evolving electrodes (Z&e-Magrini) are discussed. A new method for prediction of heat transfer on the basis of the analogy between heat and mass transfer is derived from known theoretical equations and tested in comparison to experimental data of various workers. NOMENCLATURE thermal ditTusivity (m2/s) electrode area (m*) geometric factor (-) deoarture diameter Cm) ditfusion coefficient (I&/S) acceleration of gravity (m/s') temperature (Kj gas volume flow rate (m"/s) number of bubbles (-) heat transfer coefficient (W/m' K) mass transfer coefficient (m/s) coefficient of thermat expansion (K-I) density (kg/m3) dynamic viscosity (kg/m s) fractional surface coverage (-) thermal conductivity (W/m K) kinematic viscosity (m*/s) gas hold.up (-) -Nu = ad/i Nusselt number Pr = v/a Prandtl Re = V&/Av Reynolds number SC = v/D

๐Ÿ“œ SIMILAR VOLUMES

Mass transfer at gas evolving electrodes
Mass transfer at gas evolving electrodes
โœ L.J.J. Janssen ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 598 KB

To elucidate the mechanism af the mass transfer at a gas evolving electrode, the thickness of the diffusion layer 6 has been determined as a function of the volume rate of the gas evolution u, for both hydrogen and oxygen evolving electrodes in alkaline solution. The effect of electrode material, al

Mass transfer at horizontal gas-evolving
Mass transfer at horizontal gas-evolving electrodes
โœ M.G. Fouad; G.H. Sedahmed ๐Ÿ“‚ Article ๐Ÿ“… 1973 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 328 KB

The effect of H2 and O2 evolution on the mass transfer coefficiem of the reduction of K3Fe(CN)6 and the oxidation of &Fe(CN), at nickel electrodes was studied up to 105 mA/cm2. The relation between the rate of gas evolution and the mass transfer coefficient was found to be: and log K = a + 0.25 log

Mass transfer at gas evolving electrodes
Mass transfer at gas evolving electrodes with superposition of hydrodynamic flow
โœ H. Vogt ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 336 KB

## Absirac-Mass transfer at gas evolving electrodes with add&i&al major hydrodynamic liquid Row is influenced by two phenomena: effects directly resulting from the generated bubbles and effects by high liquid velocity parallel to the electrode surface. For the case of superposition of both mechani