Study of the characteristics of heat and mass transfer in a gas-solid body system at low temperatures

1991 ◽  
Vol 61 (6) ◽  
pp. 1524-1529
Author(s):  
N. V. Atapina ◽  
D. N. Garipogly ◽  
A. S. Drobyshev ◽  
V. A. Kuz'min ◽  
S. L. Maksimov
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Solid Body ◽  
Low Temperatures ◽  
Body System

Analysis of Performance of Plate Fin Heat Exchanger

2021 ◽  
Vol 9 (VIII) ◽  
pp. 211-214
Author(s):  
Ajai Kumar Verma
Keyword(s):  
Mass Transfer ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat And Mass Transfer ◽  
Low Temperatures ◽  
Liquid Oxygen ◽  
Space Vehicles ◽  
Lab Experiment ◽  
Actual Application ◽  
Analysis Of Performance

Plate fin heat exchanger is a kind of smaller heat exchange device which has applications in cars, low temperatures, rockets space vehicles etc. The plate fin heat exchanger devices are mostly utilized for liquefaction of nitrogen. So that they are highly efficient because no liquid oxygen will be produced if the efficiency of the system is below the required value, and that is nearly 87%. That’s ‘why it is very necessary to check their efficiency before bringing them in actual application. This efficiency has been calculated here. The required heat exchanger has different shape and its effectiveness is tested experimentally in the heat and mass transfer lab. Experiment is carried out by putting the Quantity of hot and cold fluid same, but the result is obtained by taking different quantity of fluid for different experiment. It means that for one test quantity of both the fluid is taken same and this test is repeated for different quantity. So, in this way productiveness of the required exchanger is determined for different quantity.

Intensification of foam technology by the energy of the electrohydrothermal power field. Part 3. Investigation of the processes of heat and mass transfer in the foam system under the influence of EHTPF

2020 ◽  
pp. 64-66
Author(s):  
V. N. Sokov
Keyword(s):  
Mass Transfer ◽  
Thermal Expansion ◽  
Gas Phase ◽  
Heat And Mass Transfer ◽  
Low Temperatures ◽  
Analytical Study ◽  
Closed Volume ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Single Flow

As a result of thermal expansion in the foam mass of the gas phase, which acts as a sealing component in a closed volume, excessive internal pressure is generated and fields of pressure, temperature, and moisture content are formed. Particular flows of liquid arising from these fields are directed from the center to the perforated walls of the form with a distance beyond it. In EHTPF, there are three partial flows of moisture that make up a single flow in the mass. Thus, self-compaction is accompanied by heat and mass transfer processes. At low temperatures, moisture moves in the material in the form of a liquid, and at high temperatures, in the form of vapor. The density of the total moisture flow can be represented as the sum of the densities of private flows. An analytical study of the mechanism of heat and mass transfer flows allows one to analyze the behavior of the foam mass during heatpower treatment and to choose the best conditions for it.

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