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Relative ventilation effectiveness in a mechanically ventilated airspace under isothermal conditions.

Authors
Maghirang-RG; Jerez-SB; Predicala-BZ
Source
Trans ASAE 2001 May/Jun; 44(3):691-696
NIOSHTIC No.
20022339
Abstract
The relative ventilation effectiveness for airborne dust was evaluated in a mechanically ventilated airspace under isothermal flow conditions. Three supply air inlets, specifically, one-way ceiling, two-way ceiling, and sidewall, were compared at ventilation rates of 0.1, 0.5, 0.7, and 1.0 m3/s. The dust concentrations were measured with inhalable dust samplers, from which the relative ventilation effectiveness at various locations, the overall relative ventilation effectiveness for the airspace, and the spatial variability in dust concentrations were obtained. Results showed that the dust concentration and the relative ventilation effectiveness varied with location and for the three air inlets. The one-way ceiling air inlet, in which the supply air jet was directed away from the exhaust fan, was the best in removing the dust from the locations considered. It had the highest overall relative ventilation effectiveness (Eo=1.34), although it also had the highest spatial variability in dust concentration (CV=0.48). The sidewall air inlet, on the other hand, had the most uniform dust concentration (CV=0.36); however, it had the lowest relative ventilation effectiveness (Eo=0.67). Additional research should consider other types of air inlets and nonisothermal conditions.
Keywords
Ventilation-systems; Ventilation; Airborne-dusts; Airborne-particles; Particulate-dust; Particulates; Dusts; Air-quality; Air-quality-control; Air-contamination; Agricultural-industry; Agriculture; Author Keywords: Airborne dust; Air quality
Contact
Ronaldo G. Maghirang, 147 Seaton Hall, Kansas State University, Manhattan, KS 66506
CODEN
TAAEAJ
Publication Date
20010501
Document Type
Journal Article
Email Address
rmaghir@ksu.edu
Funding Amount
72721
Funding Type
Grant
Fiscal Year
2001
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R03-OH-003581
Issue of Publication
3
ISSN
0001-2351
Priority Area
Work Environment And Workforce: Indoor Environment
Source Name
Transactions of the American Society of Agricultural Engineers
State
KS
Performing Organization
Kansas State University, Manhattan, Kansas
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