Combined Heat and Mass Transfer in Porous Media Heat Exchanger

2002 ◽  
Author(s):  
Adriana M. Druma ◽  
Khairul M. Alam
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Heat Exchanger ◽  
Heat And Mass Transfer ◽  
Energy Recovery ◽  
Low Cost ◽  
Porous Matrix ◽  
Air Stream ◽  
The Matrix ◽  
Heat And Moisture

A numerical and experimental study of heat and mass transfer has been carried out for an energy recovery ventilator with a porous media heat exchanger. The energy recovery ventilator selected for this study has a rotary periodic heat exchanger that can transfer heat and moisture from one air stream to another. Such heat exchangers can be operated with high effectiveness by using a low-cost porous matrix as the heat exchanger medium. The influence of porosity in the matrix has been studied numerically and the performance of the energy recovery ventilator in recovering both heat and moisture has been modeled.

Combined Heat and Mass Transfer in Regenerators with Hygroscopic Materials

1979 ◽  
Vol 101 (2) ◽  
pp. 205-210 ◽  
Author(s):  
R. B. Holmberg
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Transfer Equations ◽  
Difference Type ◽  
The Matrix ◽  
Flow Heat ◽  
Performance Results ◽  
Heat And Moisture ◽  
Matrix Heat ◽  
Simultaneous Heat

Simultaneous heat and mass transfer in periodic-flow heat and mass exchangers, or regenerators, with hygroscopic matrix materials has been analyzed. The coupled heat and mass transfer equations are derived for boundary-layer controlled heat and mass transfer and include longitudinal heat conduction in the matrix. A numerical method of the finite-difference type is applied to the steady-state performance. Results for a water vapor-air mixture show the influence of matrix heat and moisture capacities on temperature and humidity efficiencies. Distributions of air temperature, air humidity, matrix temperature and adsorbent moisture content are calculated in drying as well as recovery operations.

HEAT AND MASS TRANSFER IN REACTIVE POROUS MEDIA WITH LOCAL NONEQUILIBRIUM CONDITIONS

2012 ◽  
Vol 15 (4) ◽  
pp. 329-341 ◽  
Author(s):  
A. Bousri ◽  
Khedidja Bouhadef ◽  
H. Beji ◽  
Rachid Bennacer ◽  
R. Nebbali
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Heat And Mass Transfer ◽  
Nonequilibrium Conditions

CFD-based structure optimization of plate bundle in plate-fin heat exchanger considering flow and heat transfer performance

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yao Li ◽  
Haiqing Si ◽  
Jingxuan Qiu ◽  
Yingying Shen ◽  
Peihong Zhang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat Exchanger ◽  
Heat And Mass Transfer ◽  
Field Performance ◽  
High Specific Surface Area ◽  
Calculation Model ◽  
Air Separation ◽  
Transfer Efficiency ◽  
Heat Transfer Efficiency

Abstract The plate-fin heat exchanger has been widely applied in the field of air separation and aerospace due to its high specific surface area of heat transfer. However, the low heat transfer efficiency of its plate bundles has also attracted more attention. It is of great significance to optimize the structure of plate-fin heat exchanger to improve its heat transfer efficiency. The plate bundle was studied by combining numerical simulation with experiment. Firstly, according to the heat and mass transfer theory, the plate bundle calculation model of plate-fin heat exchanger was established, and the accuracy of the UDF (User-Defined Functions) for describing the mass and heat transfer was verified. Then, the influences of fin structure parameters on the heat and mass transfer characteristics of channel were discussed, including the height, spacing, thickness and length of fins. Finally the influence of various factors on the flow field performance under different flow states was integrated to complete the optimal design of the plate bundle.

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