Relation of the volumetric mass and heat transfer coefficients in a cooling tower

Mass and heat transfer coefficients (MTC and HTC) in automotive exhaust catalytic monolith channels are estimated and correlated for a wide range of gas velocities and prevailing conditions of small up to real size converters. The coefficient estimation is based on a two dimensional computational fluid dynamic (2-D CFD) model developed in Comsol Multiphysics, taking into account catalytic rates of a real catalytic converter. The effect of channel size and reaction rates on mass and heat transfer coefficients and the applicability of the proposed correlations at different conditions are discussed. The correlations proposed predict very satisfactorily the mass and heat transfer coefficients calculated from the 2-D CFD model along the channel length. The use of a one dimensional (1-D) simplified model that couples a plug flow reactor (PFR) with mass transport and heat transport effects using the mass and heat transfer correlations of this study is proved to be appropriate for the simulation of the monolith channel operation.

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Simultaneous estimation of the spacewise and timewise variations of mass and heat transfer coefficients in drying

Inverse Problems in Science and Engineering ◽

10.1080/17415970600573981 ◽

2007 ◽

Vol 15 (2) ◽

pp. 137-150 ◽

Cited By ~ 5

Author(s):

Leonardo F. Saker ◽

Helcio R. B. Orlande ◽

Cheng-Hung Huang ◽

Gligor H. Kanevce ◽

Ljubica P. Kanevce

Keyword(s):

Heat Transfer ◽

Simultaneous Estimation ◽

Transfer Coefficients ◽

Heat Transfer Coefficients ◽

Mass And Heat Transfer

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Mass and heat transfer coefficients

Problems for BiomedicalFluid Mechanics and Transport Phenomena ◽

10.1017/cbo9781139794787.016 ◽

2013 ◽

pp. 142-150

Author(s):

Mark Johnson ◽

C. Ross Ethier

Keyword(s):

Heat Transfer ◽

Transfer Coefficients ◽

Heat Transfer Coefficients ◽

Mass And Heat Transfer

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Analysis of adsorption kinetics on zeolites at non isothermal conditions and analysis of the kinetics curves

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19810678 ◽

1981 ◽

Vol 46 (3) ◽

pp. 678-686 ◽

Cited By ~ 7

Author(s):

Arkadij Bezus ◽

Arlette Zikánová ◽

Miloš Smutek ◽

Milan Kočiřík

Keyword(s):

Heat Transfer ◽

Adsorption Kinetics ◽

Model Testing ◽

Adsorption Kinetic ◽

Transfer Coefficients ◽

Kinetic Curves ◽

Isothermal Conditions ◽

Heat Transfer Coefficients ◽

Mass And Heat Transfer

Adsorption kinetic curves were numerically simulated for the case of simultaneous mass and heat transfer. Proposed and discussed are different methods of model testing, experimental curves fitting and of evaluation of the diffusion and heat transfer coefficients from experimental kinetic curves.

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New Approach to Determine the Heat+transfer Coefficients for Cooling Tower Packing

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1243/pime_proc_1989_203_193_02 ◽

1989 ◽

Vol 203 (2) ◽

pp. 75-84 ◽

Cited By ~ 1

Author(s):

M A Younis

Keyword(s):

Heat Transfer ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

Cooling Tower ◽

Empirical Relationship ◽

Packed Bed ◽

Transfer Coefficients ◽

Water Contact ◽

Heat Transfer Coefficients ◽

Tower Packing

The heat input response technique was developed to determine the heat-transfer coefficients for a forced draught cooling tower packing. The method was applied to a counter current type air-water contact system in a packed bed. A temperature change was alternately imposed on inlet air at the tower bottom and on inlet water at the tower top. Outlet temperatures of air and water were measured with time. From zeroth moments of these temperature changes, water-film and air-film heat-transfer coefficients have been estimated. Finally, the effect of the water/air loading ratio and the packing material, such as wood, aluminium wire netting and plastic PVC on the values of the heat-transfer coefficients was experimentally tested. An empirical relationship between the gas-side heat-transfer coefficient, liquid-side heat-transfer coefficient and water/gas ratio has been established within the range of the tested data.

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