Perfection of technology and equipment for heating of steel ladles lining at horizontal stands

2021 ◽  
Vol 77 (2) ◽  
pp. 187-192
Author(s):  
V. A. Spirin ◽  
V. E. Nikol’skii ◽  
D. V. Vokhmintsev ◽  
A. A. Moiseev ◽  
P. G. Smirnov ◽  
...  
Keyword(s):  
Heating Process ◽  
Steel Ladle ◽  
Power Calculation ◽  
Horizontal Position ◽  
Heat And Mass Exchange ◽  
Heating Facility ◽  
Exchange Processes ◽  
Very High ◽  
Nonstationary Conditions ◽  
Numeral Simulation

To change or repair sliding gates, steel ladles are installed in horizontal position, in which they are heated to keep a working temperature of lining. Peculiarities of a steel ladle heating in horizontal position considered. Description of the lining heating process presented, necessity of elaboration a method of its numeral simulation justified. The method should enable to make studies of influence of various methods of burner location on the ladle cover and torch parameters on efficiency of heating for a particular ladle and time available for the heating. A method of mathematical simulation of heat- and mass-exchange processes of lining heating in nonstationary conditions described. Based on examples of various variants of torch power calculation, dynamics of a ladle walls heating was shown. Results of calculation of temperature distribution over a ladle lining presented, as well as the map of gases flow in the ladle volume for various parameters of torch and heating process stages. Taking into consideration, that calculation costs related to simulation of nonstationary ladle heating are very high, a simplified one-dimensional model of calculation of lining heating process was elaborated. In the model correction factors are used, obtained as a result of numeral simulation. The model enables to make calculations in real time conditions and to use them for control at a practical steel ladle heating in horizontal position at a modern automized heating facility.

scholarly journals Universal multifunctional device for heat and mass exchange processes during organic raw material processing

2018 ◽  
Vol 6 (1 (96)) ◽  
pp. 47-54 ◽  
Author(s):  
Aleksey Zagorulko ◽  
Andrii Zahorulko ◽  
Kateryna Kasabova ◽  
Vitalii Chervonyi ◽  
Oleksandr Omelchenko ◽  
...  
Keyword(s):  
Material Processing ◽  
Mass Exchange ◽  
Raw Material ◽  
Heat And Mass Exchange ◽  
Exchange Processes ◽  
Multifunctional Device

A Comprehensive Line-Heating Algorithm for Automatic Formation of Curved Shell Plates

2004 ◽  
Vol 20 (02) ◽  
pp. 69-78 ◽  
Author(s):  
Jong Gye Shin ◽  
Cheol Ho Ryu ◽  
Jong-Ho Nam
Keyword(s):  
Heating Process ◽  
Heat Sources ◽  
Line Heating ◽  
Heating Facility ◽  
Measuring Methods ◽  
Process Line ◽  
Automated Line ◽  
Automatic Formation ◽  
Surface Comparison

Line heating is a method used in the production of highly curved plates in the shipbuilding process. Line-heating process is generally regarded as one of the outdated technologies in the modernized and automated shipbuilding process. No piece of information in the line-heating process is either quantified or computerized. These drawbacks have restricted the automation of line-heating process and, as a result, the entire shipbuilding process. Therefore, a new automated line-heating process based on quantitative and computerized heating information has been sought. This paper describes a comprehensive algorithm for an automated line-heating process. By focusing on the overview of the complete algorithm, this paper integrates the components of the algorithm that have been separately published by the authors. The overall procedure of the automated line-heating process, including shell piece modeling, shell development, cylindrical approximation for curved plates, computation of heating information, and measurement and surface comparison, is discussed. The comprehensive algorithm is adjustable for different heat sources and measuring methods, without incurring fundamental changes in algorithm. The proposed line-heating algorithm has been implemented and transferred to some shipyards for customized applications. Simulation of automated line-heating facility

scholarly journals Modeling of greenhouse radiant heating

2018 ◽  
Vol 193 ◽  
pp. 03006 ◽  
Author(s):  
Mikhail Pavlov ◽  
Sergey Lukin ◽  
Oleg Derevianko
Keyword(s):  
Mathematical Model ◽  
Air Temperature ◽  
Mass Exchange ◽  
Thermal Power ◽  
Equation System ◽  
Radiant Heating ◽  
Heat And Mass Exchange ◽  
Heating Systems ◽  
Exchange Processes ◽  
The Impact

Commercially available greenhouses are commonly used for provision of year-round growing of agricultural crops at protected ground. In order to provide favorable conditions for plants growth these agricultural constructions should be equipped by artificial heating systems in cold sea-sons. This work presents an overview of basic traditional and alternative heating systems which find their applications in agriculture. Advantages of application of roof radiant heating with infrared radiation sources for green-houses are discussed. It was discovered that now there is no appropriate mathematical model of greenhouse radiant heating, which takes into account both heat and mass exchange processes. Here we propose a mathematical model of radiant heating, which includes equation system of both heat and mass exchange processes for greenhouse, its enclosure and soil. The numer-ical calculations were performed for commercially available greenhouse “Farmer 7.5”. We investigated the impact of external air temperature and heat exchange rate on the following greenhouse radiant heating characteris-tics: internal air temperature, heating system thermal power and water dis-charge for soil watering.

Comparative characteristics of industrial packings for heat-and mass-exchange processes

2008 ◽  
Vol 44 (3-4) ◽  
pp. 187-192 ◽  
Author(s):  
A. M. Kagan ◽  
A. S. Pushnov
Keyword(s):  
Mass Exchange ◽  
Heat And Mass Exchange ◽  
Exchange Processes

scholarly journals SPEAR: Early results from a very high latitude ionospheric heating facility

2007 ◽  
Vol 40 (3) ◽  
pp. 384-389 ◽  
Author(s):  
T.K. Yeoman ◽  
N. Blagoveshchenskaya ◽  
V. Kornienko ◽  
T.R. Robinson ◽  
R.S. Dhillon ◽  
...  
Keyword(s):  
High Latitude ◽  
Ionospheric Heating ◽  
Heating Facility ◽  
Early Results ◽  
Very High

scholarly journals Comparative Analysis between Experimental and Numerical Model resultsof a Jetin a Shallow Water Tank

2020 ◽  
Vol 14 ◽  
Keyword(s):  
Comparative Analysis ◽  
Turbulent Flow ◽  
Large Scale ◽  
Water Tank ◽  
Heat And Mass Exchange ◽  
Small Depth ◽  
Exchange Processes ◽  
Side Walls ◽  
Turbulent Modeling ◽  
Good Agreement

In this work a comparative analysis of a turbulent jet experiment produced by the injection of dyed water into a shallow tank filled with water of the same density and the results of a numerical modelare presented. Dye was injected with the source fluid as a tracer. The concentration of the dye in the shallow turbulent flow was determined using a video imaging technique.The present laboratory experiments were conducted in a tank of small depth, and it is significantly wide to avoid the effect of the side walls. The space between the parallel walls of the tank can be varied during the experiments. The large-scale turbulent flow in the water sheet between the walls of the tank is confined to essentially two-dimensional motion. The shear on the bottom of the tank is a momentum sink to be considered.A comparison of the numerical resultswith the experimental data showed a very good agreement in terms of the position reached by the jet at different times after injection is initialized. These findings are useful for turbulent modeling of the shallow shear flow and for application to the large scale heat and mass exchange processes in lagoons, lakes, the ocean and the atmosphere

scholarly journals A Numerical Study of Heat and Mass Exchange Processes in Swing Adsorption Device for Oxygen-Enriched Air

2019 ◽  
pp. 056-065
Author(s):  
E.I. Akulinin ◽  
◽  
O.O. Golubyatnikov ◽  
D.S. Dvoretsky ◽  
S.I. Dvoretsky ◽  
...  
Keyword(s):  
Mass Exchange ◽  
Numerical Study ◽  
Heat And Mass Exchange ◽  
Exchange Processes

scholarly journals Analysis of the causes of traction electric failures of electric cargo cars operated on railways of the Republic of Uzbekistan

2021 ◽  
Vol 264 ◽  
pp. 05041
Author(s):  
Sardor Nuriddinov ◽  
Bobomurod Avazov ◽  
Fozil Hasanov ◽  
Yulduz Rakhmonova
Keyword(s):  
Mass Exchange ◽  
Short Circuit ◽  
Heat Radiation ◽  
Local Damage ◽  
Heat And Mass Exchange ◽  
The Past ◽  
Exchange Processes ◽  
The Republic ◽  
Insulation Breakdown ◽  
Intense Heat

In this article, it is considered to analyze the reliability of TEM (traction electric machine) of electric locomotives of the railways of the Republic of Uzbekistan. To determine the damage, the most expedient and effective method will be to extend the life of the insulation by encapsulating local damage using impregnating materials and heat radiation. Over the past ten years, a stable tendency for insulation breakdown and turn-to-turn closure of the armature winding of the NB-514 type has been maintained in Unitary Enterprise (UE) “O'ztemiryo'lmashta'mir.” In this regard, a hypothesis was put forward that insulation breakdowns and turn-to-turn short-circuit of the armature winding most often occur due to intense heat and mass exchange processes in the insulation of the frontal parts of their windings with open section heads.

Hydrodynamics of regular packings formed from cellular inclined cylinders for heat- and mass-exchange processes

2013 ◽  
Vol 48 (9-10) ◽  
pp. 608-614 ◽  
Author(s):  
M. V. Shilin ◽  
M. G. Berengarten ◽  
A. S. Pushnov ◽  
M. I. Klyushenkova
Keyword(s):  
Mass Exchange ◽  
Heat And Mass Exchange ◽  
Exchange Processes
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