Computer Simulation of the Parameters for Plenum and Exhaust Ventilation System



Annotation:

The main purpose of local ventilation application at the enterprise is the localization of harmful impurities emitted in the process of performing technological operations. Selection of the collaborative modes of such complex systems as а plenum fresh air stream and the suction spectrum of the aspiration system is the main condition for prevention of the emission of harmful and hazardous substances in the premise. 

Use of the modern nozzles on the end branch pipes of the air ventilation devices significantly changes already developed recommendations for following the modes of operation of the existing local ventilation systems.

The given results of the experimental work on computer simulation of the process of interaction of the plenum stream and suction spectrum performed with the help of STAR-CCM + v9.06 complex show that it is possible to use several basic schemes of air flow distribution in the ventilated room.

In this case, the distance between the plenum stream and the suction spectrum of the aspiration device is a determining factor in the formation of one or another scheme of ventilation.

The analysis of obtained velocity fields of air streams in the area of active interaction of the plenum stream and the suction torch allowed to recommend the most optimal, from the point of view of localization of harmful and (or) hazardous substances, scheme of distribution of air masses in the ventilated volume. The proposed empirical relationship allows to calculate the distance of the optimal interaction of the suction spectrum and the plenum stream depending on the shape of the plenum nozzle and the air flow rate. To search for the optimal parameters of the computer model the standard mathematical method was used for calculating the process of air distribution adopted for constructing velocity fields in the computer program database.

References:
  1. Grimitlin M.I., Timofeev O.N., Elterman E.M., Elyanov L.S. Ventilation and heating of ship-building shops. Leningrad: Sudostroenie, 1978. 239 p. (In Russ.).
  2. Bogoslovskiy V.I. Heating and ventilation: textbook for the universities. In 2 parts. Pt. 2. Ventilation. Moscow: Stroyizdat, 1976. 439 p. (In Russ.).
  3. Logachev I.N., Logachev K.I. Industrial air quality and ventilation: controlling dust emissions. Boca Raton: CRC Press, 2014. 417 p.
  4. Logachev I., Logachev K., Averkova O. Local Exhaust Ventilation: Aerodynamic Processes and Calculations of Dust Emissions. Boca Raton: CRC Press, 2015. 576 p.
  5. Pozin G.M. Local exhaust ventilation is the most effective way of organizing indoor air exchange. Santekhnika. Otoplenie. Konditsionirovanie = Plumbing. Heating. Conditioning. 2006. № 10. pp. 9–11. (In Russ.).
  6. Chumakov Yu.S. An experimental study of the structure of the transitional and turbulent free convective boundary layer on the vertical heated surface: thesis... Doctor of Physical and Mathematical Sciences. Saint-Petersburg: SPbGTU, 2000. pp. 227–251. (In Russ.).
  7. Kopin S.V. Optimization of the design of the nozzle edge of the end branch pipe of the local ventilation system by computer simulation. Vestnik grazhdanskikh inzhenerov = Bulletin of civil engineers. 2016. № 1 (54). pp. 108–112. (In Russ.).
  8. Kopin S.V. Regularities of Formation of the Spectrum of Absorption of a Nozzle in the Form of a Flat Flange with an Edge of a Special Design. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2016. № 7. pp. 69–72. (In Russ.).
  9. Kopin S.V. Suction flat nozzle. Patent RF № 162562, F24F 7/06 B08B 15/00. Applied: November 16, 2015. Published: June 20, 2016. Bulletin № 17.
  10. Sulin A.B., Kopin S.V., Neganov D.V. The way to increase the efficiency of the local exhaust ventilation unit/ Production secret (know-how) registration number RID 615011430026 of 01/14/2015. Available at: https://rosrid.ru/rid/0DO6000KAyxb15JHII2cLb00 (accessed: October 20, 2020). (In Russ.).
  11. Timofeevskiy A.L., Sulin A.B., Ryabova T.V., Neganov D.V. Characteristics of the air supply envelop of the cooled flooded air stream. AIP Conference Proceedings. 2017. № 1876. DOI: 10.1063/1.4998879
  12. Zhu H., Shen Y., Yan Z., Guo Q. A numerical study on the feasibility and efficiency of point smoke extraction strategies in large cross-section shield tunnel fires using CFD modeling. Journal of Loss Prevention in the Process Industries. 2016. Vol. 44. pp. 158–170.
DOI: 10.24000/0409-2961-2020-2-7-11
Year: 2020
Issue num: February
Keywords : local ventilation air velocity suction torch velocity field inlet stream computer simulatio
Authors:
  • Kopin S.V.
    Cand. Sci. (Eng.), Leading Researcher, mobil1111@mail.ru, Institute «Yakutniproalmaz» PJSC «ALROSA», Mirny, Russian Federation