Modeling heat-and-mass exchange processes in the Vanyukov furnace in specific operational conditions

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.

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

Chemical and Petroleum Engineering ◽

10.1007/s10556-008-9034-6 ◽

2008 ◽

Vol 44 (3-4) ◽

pp. 187-192 ◽

Cited By ~ 1

Author(s):

A. M. Kagan ◽

A. S. Pushnov

Keyword(s):

Mass Exchange ◽

Heat And Mass Exchange ◽

Exchange Processes

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

Advanced Materials & Technologies ◽

10.17277/amt.2019.03.pp.056-065 ◽

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

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

E3S Web of Conferences ◽

10.1051/e3sconf/202126405041 ◽

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.

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