Heat transfer in a bubbled layer on tube-grid trays in the process of hydrocarbon gas absorption

1972 ◽  
Vol 8 (12) ◽  
pp. 932-936
Author(s):  
A. D. Sementsov ◽  
M. �. A�rov ◽  
T. A. Bystrova ◽  
V. G. Gorechenkov ◽  
L. E. Sum-Shik ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Gas Absorption ◽  
Tube Grid ◽  
Hydrocarbon Gas

scholarly journals MODELING OF OPERATING MODES GAS COMPOSITE CYLINDERS

2021 ◽  
pp. 63-74
Author(s):  
N. N. Osipova ◽  
B. M. Grishin
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Cylinder Wall ◽  
Operating Modes ◽  
Hydrocarbon Gas ◽  
Gas Consumption ◽  
Approximate Dependence ◽  
The Heat Transfer Coefficient ◽  
Composite Cylinders

Statement of the problem. The emergence of composite cylinders on the market offers a range of technological and operational advantages in comparison with metal cylinders of liquefied hydrocarbon gas. At the same time, the absence of substantiated recommendations for determining the vapor capacity of cylinders by modes of their operation in the scientific literature limits their wide implementation into gas practice. Results. A mathematical model considering the operation of the cylinder in the mode of periodic gas consumption is developed, the coefficient of non-uniformity of gas consumption during the day is calculated, the values of the heat transfer coefficient of the composite cylinder wall are identified, the approximate dependence of the heat transfer coefficient is obtained. Conclusions. As a result of the research, the criteria influencing steam productivity of compositecylinders of the liquefied hydrocarbon gas in various operating modes are found.

Modeling of Operating Modes Gas Composite Cylinders

2021 ◽  
pp. 49-59
Author(s):  
Н. Н. Осипова ◽  
Б. М. Гришин
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Cylinder Wall ◽  
Operating Modes ◽  
Hydrocarbon Gas ◽  
Gas Consumption ◽  
Approximate Dependence ◽  
The Heat Transfer Coefficient ◽  
Composite Cylinders

Состояние проблемы. Появление на рынке композитных баллонов обеспечивает ряд технологических и эксплуатационных преимуществ по сравнению с металлическими баллонами сжиженного углеводородного газа. В то же время отсутствие в научной литературе обоснованных рекомендаций по определению паропроизводительности баллонов по режимам их эксплуатации ограничивает их широкое внедрение в газовую практику. Результаты. Разработана математическая модель, учитывающая эксплуатацию баллона в режиме периодического газопотребления, рассчитан коэффициент неравномерности газопотребления в течение суток, определены значения коэффициента теплопередачи стенки композитного баллона, получена аппроксимирующая зависимость коэффициента теплопередачи от уровня заполнения баллона газом. Выводы. В результате проведенных исследований установлены критерии, влияющие на паропроизводительность композитных баллонов сжиженного углеводородного газа в различных режимах эксплуатации. Statement of the problem. The emergence of composite cylinders on the market offers a range of technological and operational advantages in comparison with metal cylinders of liquefied hydrocarbon gas. At the same time, the absence of substantiated recommendations for determining the vapor capacity of cylinders by modes of their operation in the scientific literature limits their wide implementation into gas practice. Results. A mathematical model considering the operation of the cylinder in the mode of periodic gas consumption is developed, the coefficient of non-uniformity of gas consumption during the day is calculated, the values of the heat transfer coefficient of the composite cylinder wall are identified, the approximate dependence of the heat transfer coefficient is obtained. Conclusions. As a result of the research, the criteria influencing steam productivity of composite cylinders of the liquefied hydrocarbon gas in various operating modes are found.

Change in efficiency of mass exchange in hydrocarbon gas absorption processes

1966 ◽  
Vol 2 (7) ◽  
pp. 448-452
Author(s):  
I. A. Aleksandrov ◽  
V. G. Gorechenkov ◽  
V. V. Shcherbakov
Keyword(s):  
Mass Exchange ◽  
Gas Absorption ◽  
Hydrocarbon Gas

Efficiency of tubular grid plates in hydrocarbon gas absorption

1971 ◽  
Vol 7 (9) ◽  
pp. 682-687
Author(s):  
A. D. Sementsov ◽  
M. �. Aerov ◽  
T. A. Bystrova ◽  
V. G. Gorechenkov ◽  
A. I. Salmin ◽  
...  
Keyword(s):  
Gas Absorption ◽  
Hydrocarbon Gas ◽  
Tubular Grid

HEAT TRANSFER ACCOMPANYING GAS ABSORPTION

1970 ◽  
Author(s):  
S. J. Green ◽  
S. H. Chiang
Keyword(s):  
Heat Transfer ◽  
Gas Absorption

Hydrocarbon Gas Absorption by a HeNe Laser Beam at a 339-μ Wavelength

1969 ◽  
Vol 8 (8) ◽  
pp. 1741 ◽  
Author(s):  
Dean N. Jaynes ◽  
Benjamin H. Beam
Keyword(s):  
Laser Beam ◽  
Gas Absorption ◽  
Hene Laser ◽  
Hydrocarbon Gas

The Effect of Molecular Gas Absorption on Radiative Heat Transfer With Scattering

1982 ◽  
Vol 104 (4) ◽  
pp. 580-586 ◽  
Author(s):  
R. O. Buckius
Keyword(s):  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Wide Band ◽  
Gas Absorption ◽  
Molecular Gas ◽  
Absorption Properties ◽  
Pressure Limit ◽  
Band Absorption ◽  
Planar Medium

Radiative heat transfer in an isotropically scattering and nongray absorbing planar medium is investigated. General wide-band absorption quantities, including the effects of gray absorption and scattering by the scattering components and nongray absorption by the gaseous components, are considered. Analysis for the reflection, transmission, and emission from isothermal layers is presented. Numerical calculations are presented for the wide-band absorption quantities in the high-pressure limit. The effects of the scattering and absorption properties on the wide band absorption quantities are discussed.

Computation of Radiative Heat Transfer in a Cylindrical Enclosure

1996 ◽  
Author(s):  
Huiyu Fu ◽  
Ali Veshagh
Keyword(s):  
Heat Transfer ◽  
Absorption Coefficient ◽  
Combustion Chamber ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Gas Absorption ◽  
Combustion Model ◽  
Integration Scheme ◽  
Transfer Model ◽  
Zone Method

Abstract A radiative heat transfer model for cylindrical enclosure in which the gas and temperature are axi-symmetrically distributed was developed using the zone method of analysis. A rigorous numerical integration scheme was devised to calculate various types of direct exchange areas between different zones. The radiative heat transfer between gas zones and that between gas zones and surface zones could therefore be computed accurately based upon distributions of gas temperature and absorption coefficient. This radiation model was used to compute the radiative heat transfer in a diesel engine combustion chamber. Extensive soot data obtained via a sampling valve were used to calculate the gas absorption coefficient. An attempt was also made to allow for the radiation from the non-luminous gases, i.e. carbon dioxide and water vapour. Temperature distribution was obtained from a multi-zone combustion model. Results showed that the radiative heat transfer to the combustion chamber walls was negligible during the early stage of combustion, but represented a significant part of the total heat transfer when it reached its peak value. The results also showed the importance of radiative heat transfer between the various gas zones in the combustion chamber.

New replica method with plasma polymerized film by glow discharge

1988 ◽  
Vol 46 ◽  
pp. 414-415
Author(s):  
A. Tanaka ◽  
M. Yamaguchi ◽  
T. Hirano
Keyword(s):  
Power Supply ◽  
Plasma Polymerization ◽  
Vacuum Chamber ◽  
Complex Surface ◽  
Replica Method ◽  
Metal Extraction ◽  
High Voltage Power Supply ◽  
Negative Glow ◽  
Hydrocarbon Gas ◽  
Hydrocarbon Molecules

The plasma polymerization replica method and its apparatus have been devised by Tanaka (1-3). We have published several reports on its application: surface replicas of biological and inorganic specimens, replicas of freeze-fractured tissues and metal-extraction replicas with immunocytochemical markers.The apparatus for plasma polymerization consists of a high voltage power supply, a vacuum chamber containing a hydrocarbon gas (naphthalene, methane, ethylene), and electrodes of an anode disk and a cathode of the specimen base. The surface replication by plasma polymerization in negative glow phase on the cathode was carried out by gassing at 0.05-0.1 Torr and glow discharging at 1.5-3 kV D.C. Ionized hydrocarbon molecules diffused into complex surface configurations and deposited as a three-dimensionally polymerized film of 1050 nm in thickness.The resulting film on the complex surface had uniform thickness and showed no granular texture. Since the film was chemically inert, resistant to heat and mecanically strong, it could be treated with almost any organic or inorganic solvents.

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