Biliaiev N.N., Rusakova T.I. Reducing of gas concentration in the air environment

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 139

Geoteh. meh. 2018,139, 135-144

DOI: https://doi.org/10.15407/geotm2018.02.135

REDUCING OF GAS CONCENTRATION IN THE AIR ENVIRONMENT

¹Biliaiev N.N., ²Rusakova T.I.

¹Аcademician V. Lazaryan Dnipropetrovsk National University of Railway Transport, ²Oles Honchar Dnipro National University

UDC622.457:519.6

Language: Ukrainian

Abstract.

The qualitative and quantitative composition of air is one of the microclimate components. For the decline of gassed level  there are different methods: setting of screens, air curtains. Application of the local suctions can be the effective method of decision of this task. For their practical use the special mathematical methods allowing to estimate their efficiency taking into account basic factors are needed: field of speeds of current of air, diffusion, geometrical form and sizes of  suctions.

Subject of the study was process of reducing level of air pollution. Objective of the work was to improve technology of two-level suction through the use of special guide plates, and, accordingly, to improve method of numerical calculation with taking into account change of the device geometry and to assess effectiveness of this type of suction. Basis for the calculation method improvement was physical experiment on assessing effectiveness of contaminated area reduction in the presence of anthropogenic source by the way of installing horizontal plates of the same length on the top of the suction holes. The airflow velocity field was calculated by the Laplace equation for the gas velocity potential. Process of impurity propagation in atmospheric air was modeled on the basis of two-dimensional mass transfer equation, solution of which was found by a finite-difference method. As a result of this research, method for calculating the field of concentration is improved by taking into account suction geometry and meteorological parameters of the environment. The developed software made it possible to carry out a number of calculations of pollutant concentration and to estimate areas of air polluted with carbon monoxide. Dependencies are established regarding the changing risk of chronic air intoxication with carbon monoxide over the period of 10 years. The obtained results are necessary for improving microclimate parameters in the working areas and further improving the process of gas extraction with two-level suction in order to reduce level of gas pollution of the air environment and reduce chronic intoxication of people in the zone of influence.

Keywords: two-level suction, physical experiment, risk of chronic intoxication, impurity concentration.

References:

1. Alymov, V.T. and Tarasova, N.P. (2003), Tekhnogennyy risk [Technogenic risk], Akademkniga, Moscow, Russia.

2. Belikov, A.S., Shalomov, V.A., Ragimov, S.Yu. and Mihailov, M.A. (2017), “Physical modeling of changes in the energy impact on workplaces taking into account high-temperature radiation”, Vísnik Pridníprovs'koí derzhavnoí akademíí budívnitstva ta arkhítekturi [Bulletin of the Dnieper Academy of Civil Engineering and Architecture]. no. 4, pp. 231-232.

3. Biliaiev, M.M. and Rusakova, T.I. (2019), “Ways to reduce the level of intoxication of workers in the work areas near the highway”, Sbornik nauchnykh trudov NGU [Collection of scientific papers of the NSU]. no. 56, pp. 333-341.

4. Meskhi, B.Ch., Bulygin, Yu.I., Legkonogikh, A.N. and Gaidenko, A.P. (2014), “Mathematical and computer simulation of the formation of the parameters of the production environment in order to design and optimize ventilation systems for premises”, Vestnik Donskogo gosudarstvennogo tekhnicheskogo universiteta, Vol. 14, no. 2 (77), pp. 46-55.

5. Ministry of health of Ukraine (2007), Metodychni rekomendatsiyi: Otsinka ryzyku dlya zdorovya naselennya vid zabrudnennya atmosfernoho povitrya [Methodological recommendations: Risk assessment for public health from atmospheric air pollution], Ministry of health of Ukraine, Kyiv, Ukraine.

6. Zgurovskiy, M.Z., Skopetskiy, V.V., Khrushch, V.K. and Belyayev, N.N. (1997), Chislennoye modelirovaniye rasprostraneniya zagryazneniya v okruzhayushchey srede [Numerical modelling of pollution in the environment], Naukova Dumka, Kyiv, Ukraine.

7. Biliaiev, M.M. and Rusakova, T.I. (2018), “Prediction of microclimate near small architectural constructions”, Bulletin of Dnipropetrovsk University. Series “Mechanics”, Vol. 22, no. 6 (26), pp. 53-61.

8. Eccel, Em. (2012), "Estimating air humidity from temperature and precipitation measures for modelling applications", Meteorological Applications, Vol. 19, Iss. 1, pp. 118-128.

https://doi.org/10.1002/met.258

9. Égerházi, L., Kovács A. and Unger, J. (2013), "Application of Microclimate Modelling and Onsite Survey in Planning Practice Related to an Urban Micro-Environment", Hindawi Publishing Corporation Advances in Meteorology, vol. 2013, pp. 1-10.

https://doi.org/10.1155/2013/251586

10. Mohamed, H.E., Neveen, H. and Steven Dudek (2015), "Numerical modelling evaluation for the microclimate of an outdoor urban form in Cairo, Egypt", HBRC Journal, Vol. 11, Iss. 3, pp. 246-251.

https://doi.org/10.1016/j.hbrcj.2014.03.004

11. Viggiano, A., Viscido, L., Sellitto, G. and Magi, V. (2016), "Numerical simulation of energy systems to control environment microclimate Angela Genco", International journal of heat and technology, Vol. 34. Iss. 2, pp. 545-552.

https://doi.org/10.18280/ijht.34S249

About the authors:

Biliaiev Nikolay Nikolaevich, Doctor of Technical Sciences, Professor, Head of the Department Hydraulics and water supply, Academician V.  Lazaryan Dnipropetrovsk National University of Railway Transport, Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Rusakova Tatiana Ivanovna, Candidate of Technical Sciences (Ph. D), Associate Professor of the Department Aerohydrodynamics and Energy Mass Transfer, Oles Honchar Dnipro National University, Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

• < Prev
• Next >