Transient Two-Dimensional Dehumidification and Desorption Behavior of Plate Desiccants under Humid Air Flow: a Conjugate Model That Includes Diffusion and Adsorption/Desorption within the Desiccant

2011 ◽  
Vol 50 (15) ◽  
pp. 8859-8880 ◽  
Author(s):  
Hassan S. Al-Sharqawi ◽  
Noam Lior
Keyword(s):  
Air Flow ◽  
Two Dimensional ◽  
Humid Air ◽  
Adsorption Desorption ◽  
Conjugate Model

scholarly journals Numerical Modelling Of Humid Air Flow Around A Porous Body

2015 ◽  
Vol 9 (3) ◽  
pp. 161-166
Author(s):  
Aneta Bohojło-Wiśniewska
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Porous Medium ◽  
Numerical Modelling ◽  
Chinese Cabbage ◽  
Air Flow ◽  
Transfer Model ◽  
Humid Air ◽  
Ansys Fluent ◽  
Complex Heat Transfer

Summary This paper presents an example of humid air flow around a single head of Chinese cabbage under conditions of complex heat transfer. This kind of numerical simulation allows us to create a heat and humidity transfer model between the Chinese cabbage and the flowing humid air. The calculations utilize the heat transfer model in porous medium, which includes the temperature difference between the solid (vegetable tissue) and fluid (air) phases of the porous medium. Modelling and calculations were performed in ANSYS Fluent 14.5 software.

scholarly journals Positron Probing of Liquid-free Volume To Investigate Adsorption–Desorption Behavior of Water in Two-Dimensional Mesoporous SBA-3

2017 ◽  
Vol 121 (32) ◽  
pp. 17251-17262 ◽  
Author(s):  
Priya Maheshwari ◽  
Marek Gorgol ◽  
Agnieszka Kierys ◽  
Radosław Zaleski
Keyword(s):  
Free Volume ◽  
Two Dimensional ◽  
Adsorption Desorption

A Method for Calculating the Unsaturated Humid Air Flow Section Length in the Mechanical Draft Cooling Tower Sprinkler Channel

Vestnik MEI ◽  
2021 ◽  
pp. 37-43
Author(s):  
Vasiliy Ya. Gubarev ◽  
◽  
Aleksey G. Arzamastsev ◽  
Aleksey I. Sharapov ◽  
Yuliya O. Moreva ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Air Temperature ◽  
Flow Rate ◽  
Cooling Tower ◽  
Initial Conditions ◽  
Air Flow ◽  
Water Flow Rate ◽  
Flow Section ◽  
Transfer Coefficients ◽  
Humid Air

In the channels of mechanical-draft cooling tower sprinklers, a saturated air flow section may appear under certain initial conditions, the mass transfer intensity in which is limited by the steam content in the saturated air. For correctly calculating the heat and mass transfer processes in the cooling tower channel, it is necessary to have a method for determining the unsaturated air flow section length. Publications devoted to studying water cooling processes in the channels of mechanical-draft cooling tower sprinklers do not contain an assessment of the unsaturated air flow section length. A method for determining the unsaturated humid air flow section length in the mechanical-draft cooling tower sprinkler channels is proposed, which is based on the well-known criterion equations for calculating the heat transfer and mass transfer coefficients. The effect the initial air parameters have on the unsaturated air section length is studied, and graphic dependences of the unsaturated air section length are drawn up for each of the analyzed parameters. It is shown that the unsaturated humid air flow section length increases with increasing the initial air temperature. It is also found that the unsaturated air flow section length decreases with a growth in the relative air humidity. An increase in the air flow rate with a constant water flow rate leads to an increase in the unsaturated air flow section length. For the considered sprinkler channel, the saturated air region exists at an air temperature of 15°C and below, and for air temperatures above 25°C there is no saturated air flow section. It is shown that the conclusions drawn about the effect the initial air parameters have on the relative change in the unsaturated air flow section length are valid for channels of various shapes and geometric sizes. The proposed methodology and the results obtained can be used in designing mechanical-draft cooling towers and estimating their efficiency.

Experimental and modeling investigations of dropwise condensation out of convective humid air flow

2020 ◽  
Vol 151 ◽  
pp. 119349 ◽  
Author(s):  
Shaofei Zheng ◽  
Ferdinand Eimann ◽  
Christian Philipp ◽  
Tobias Fieback ◽  
Ulrich Gross
Keyword(s):  
Air Flow ◽  
Dropwise Condensation ◽  
Humid Air

An experiment on transient heat and mass transfer in humid air flow

1982 ◽  
Vol 2 (1) ◽  
pp. 3-11 ◽  
Author(s):  
I.Y. Ahmed ◽  
H. Barrow ◽  
S.L. Dixon
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Air Flow ◽  
Humid Air

Design Parameters for the Housing of Two-Dimensional Air Flow Sensors

2018 ◽  
Vol 18 (24) ◽  
pp. 10154-10162 ◽  
Author(s):  
Reiner Jedermann ◽  
Nico Hartgenbusch ◽  
Mykhailo Borysov ◽  
Walter Lang
Keyword(s):  
Air Flow ◽  
Design Parameters ◽  
Two Dimensional ◽  
Flow Sensors

scholarly journals Two dimensional temperature distribution model in human dermal region exposed at low ambient temperatures with air flow

2013 ◽  
Vol 8 (2) ◽  
pp. 11-24 ◽  
Author(s):  
DB Gurung
Keyword(s):  
Subcutaneous Tissue ◽  
Air Flow ◽  
Static Condition ◽  
Skin Surface ◽  
Distribution Model ◽  
Two Dimensional ◽  
Ambient Temperatures ◽  
Insensible Perspiration ◽  
Engineering And Technology ◽  
The Mathematical Model

This paper deals with thermo-regulation in human dermal part in a cold atmosphere with significant air flow. The mathematical model involving bio-heat equation has been solved using finite element method and Crank-Nicolson technique to numerically investigate two dimensional temperature distributions. The natural three layers of dermal part – epidermis, dermis, and subcutaneous tissue are considered for the study. The important parameters like blood mass flow rate, metabolic heat generation rate and thermal conductivity are taken distinct in each layer according to their distinct sub-regional activities. The human subject is assumed in static condition. The wind speed is considered in the range from the start of forced convection (? 0.2 m/s) and up to 5 m/s. The loss of heat from the skin surface to the environment is taken due to convection, radiation, and insensible perspiration. Kathmandu University Journal of Science, Engineering and Technology Vol. 8, No. II, December, 2012, 11-24 DOI: http://dx.doi.org/10.3126/kuset.v8i2.7320

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