Naturally ventilated industrial sheds : an investigation about the influence of wind direction in flow rate efficiency in continuous roof vents.
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Date
2021
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Abstract
Natural ventilation portrays an effective technique for lowering the internal temperature,
without spending electricity, and directly contributes to the renewal of indoor air by
establishing a healthy environment for workers. Given this, it is usual to have air vent
openings located at the top of the roof (continuous roof vents), in addition to those present
on the facades of sheds. In naturally ventilated buildings, it is recommended to give due
importance to the provision of these openings, since depending on the proposed
arrangement, the wind may or may not help in the effectiveness of this strategy. In this
work, it is evaluated via computer simulation (EnergyPlus, version 8.7.0), for the climatic
conditions of the city of Belo Horizonte/Brazil, the influence of the wind direction in the flow
rate of indoor air through the ridge vents, of the longitudinal and transversal type, present
in industrial sheds endowed with an internal source of high-intensity heat release. The
results obtained show that the flow rate has a symmetrical behavior in the openings of the
longitudinal continuous roof vent, that is, when an opening is with the maximum outflow of
the internal air, the opening opposite the predominant wind direction is acting as an entry
point for the air external. The transverse continuous roof vents are more sensitive about the
wind direction since they are positioned perpendicular to the building. The best result found
is for the wind situation occurring parallel to the shed, obtaining a reduction in the internal
temperature of up to 1°C, an increase in the rate of air changes per hour, in the internal
environment, at 1acph, and an increase of up to 10,7% in the volume of air infiltrated into
the shed.
Description
Keywords
Industrial sheds, Natural ventilation, Thermal performance, EnergyPlus
Citation
CAMARGOS, B. H. L. et al. Naturally ventilated industrial sheds : an investigation about the influence of wind direction in flow rate efficiency in continuous roof vents. Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria, v. 37, jan. 2021. Disponível em: <https://www.scipedia.com/public/Camargos_et_al_2020a>. Acesso em: 03 maio 2023.