Local Ventilation Solution for Large, Warm Emission Sources

Ilpo Kulmala, Pasi Hynynen, Irma Welling, Arto Säämänen

Research output: Contribution to journalReview ArticleScientificpeer-review

14 Citations (Scopus)

Abstract

In a foundry casting line, contaminants are released from a large area. Casting fumes include both volatile and particulate compounds. The volatile fraction contains hydrocarbons, whereas the particulate fraction mostly comprises a mixture of vaporized metal fumes. Casting fumes lower the air quality in foundries. The design of local ventilation for the casting area is a challenging task, because of the large casting area and convection plumes from warm moulds. A local ventilation solution for the mould casting area was designed and dimensioned with the aid of computational fluid dynamic (CFD) calculations. According to the calculations, the most efficient solution was a push–pull ventilation system. The prototype of the push–pull system was built and tested in actual operation at the foundry. The push flow was generated by a free plane jet that blew across the 10 m wide casting area towards an exhaust hood on the opposite side of the casting lines. The capture efficiency of the prototype was determined by the tracer gas method. The measured capture efficiencies with push jet varied between 40 and 80%, depending on the distance between the source and the exhaust. With the aid of the push flow, the average capture efficiency was increased from 40 (without jet) to 60%.
Original languageEnglish
Pages (from-to)35 - 43
Number of pages9
JournalAnnals of Work Exposures and Health
Volume51
Issue number1
DOIs
Publication statusPublished - 2007
MoE publication typeA2 Review article in a scientific journal

Fingerprint

Ventilation
Convection
Hydrodynamics
Hydrocarbons
Fungi
Gases
Metals
Air

Keywords

  • Local ventilation, push pull hood, foundry, modelling

Cite this

Kulmala, Ilpo ; Hynynen, Pasi ; Welling, Irma ; Säämänen, Arto. / Local Ventilation Solution for Large, Warm Emission Sources. In: Annals of Work Exposures and Health. 2007 ; Vol. 51, No. 1. pp. 35 - 43.
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title = "Local Ventilation Solution for Large, Warm Emission Sources",
abstract = "In a foundry casting line, contaminants are released from a large area. Casting fumes include both volatile and particulate compounds. The volatile fraction contains hydrocarbons, whereas the particulate fraction mostly comprises a mixture of vaporized metal fumes. Casting fumes lower the air quality in foundries. The design of local ventilation for the casting area is a challenging task, because of the large casting area and convection plumes from warm moulds. A local ventilation solution for the mould casting area was designed and dimensioned with the aid of computational fluid dynamic (CFD) calculations. According to the calculations, the most efficient solution was a push–pull ventilation system. The prototype of the push–pull system was built and tested in actual operation at the foundry. The push flow was generated by a free plane jet that blew across the 10 m wide casting area towards an exhaust hood on the opposite side of the casting lines. The capture efficiency of the prototype was determined by the tracer gas method. The measured capture efficiencies with push jet varied between 40 and 80{\%}, depending on the distance between the source and the exhaust. With the aid of the push flow, the average capture efficiency was increased from 40 (without jet) to 60{\%}.",
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Local Ventilation Solution for Large, Warm Emission Sources. / Kulmala, Ilpo; Hynynen, Pasi; Welling, Irma; Säämänen, Arto.

In: Annals of Work Exposures and Health, Vol. 51, No. 1, 2007, p. 35 - 43.

Research output: Contribution to journalReview ArticleScientificpeer-review

TY - JOUR

T1 - Local Ventilation Solution for Large, Warm Emission Sources

AU - Kulmala, Ilpo

AU - Hynynen, Pasi

AU - Welling, Irma

AU - Säämänen, Arto

N1 - This article was originally published in The Annals of Occupational Hygiene 15.6.2006

PY - 2007

Y1 - 2007

N2 - In a foundry casting line, contaminants are released from a large area. Casting fumes include both volatile and particulate compounds. The volatile fraction contains hydrocarbons, whereas the particulate fraction mostly comprises a mixture of vaporized metal fumes. Casting fumes lower the air quality in foundries. The design of local ventilation for the casting area is a challenging task, because of the large casting area and convection plumes from warm moulds. A local ventilation solution for the mould casting area was designed and dimensioned with the aid of computational fluid dynamic (CFD) calculations. According to the calculations, the most efficient solution was a push–pull ventilation system. The prototype of the push–pull system was built and tested in actual operation at the foundry. The push flow was generated by a free plane jet that blew across the 10 m wide casting area towards an exhaust hood on the opposite side of the casting lines. The capture efficiency of the prototype was determined by the tracer gas method. The measured capture efficiencies with push jet varied between 40 and 80%, depending on the distance between the source and the exhaust. With the aid of the push flow, the average capture efficiency was increased from 40 (without jet) to 60%.

AB - In a foundry casting line, contaminants are released from a large area. Casting fumes include both volatile and particulate compounds. The volatile fraction contains hydrocarbons, whereas the particulate fraction mostly comprises a mixture of vaporized metal fumes. Casting fumes lower the air quality in foundries. The design of local ventilation for the casting area is a challenging task, because of the large casting area and convection plumes from warm moulds. A local ventilation solution for the mould casting area was designed and dimensioned with the aid of computational fluid dynamic (CFD) calculations. According to the calculations, the most efficient solution was a push–pull ventilation system. The prototype of the push–pull system was built and tested in actual operation at the foundry. The push flow was generated by a free plane jet that blew across the 10 m wide casting area towards an exhaust hood on the opposite side of the casting lines. The capture efficiency of the prototype was determined by the tracer gas method. The measured capture efficiencies with push jet varied between 40 and 80%, depending on the distance between the source and the exhaust. With the aid of the push flow, the average capture efficiency was increased from 40 (without jet) to 60%.

KW - Local ventilation, push pull hood, foundry, modelling

U2 - https://doi.org/10.1093/annhyg/mel049

DO - https://doi.org/10.1093/annhyg/mel049

M3 - Review Article

VL - 51

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JO - Annals of Work Exposures and Health

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