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Abstract
At attic ventilation model has been developed based on equating the massflow rate of air into and out of an enclosed attic space. Attic airflows are driven by a combination of temperture (stack effect) and wind-induced pressure differences. Inputs to the model are the leakage characteristics of the attic, attic and ambient temperatures, wind speed, and wind direction. Predicted ventilation rates are compared with measured data from two separate attics that have been monitored over the past two years. One attic had no intentional openings and correspondingly low ventilation rates, while the second attic had soffit and roof vents and high ventilatio rates. The model predictions showed reasonably good agreement with the measured data, particularly the dependence of ventilation rate on wind speed and wind direction.
At attic ventilation model has been developed based on equating the massflow rate of air into and out of an enclosed attic space. Attic airflows are driven by a combination of temperture (stack effect) and wind-induced pressure differences. Inputs to the model are the leakage characteristics of the attic, attic and ambient temperatures, wind speed, and wind direction. Predicted ventilation rates are compared with measured data from two separate attics that have been monitored over the past two years. One attic had no intentional openings and correspondingly low ventilation rates, while the second attic had soffit and roof vents and high ventilatio rates. The model predictions showed reasonably good agreement with the measured data, particularly the dependence of ventilation rate on wind speed and wind direction.
Date
12/1992
12/1992
Author(s)
Forest, T W; Walker, I S
Forest, T W; Walker, I S
Page(s)
399-
399-
Keyword(s)
ventilation; airflow; ambient temperature; ventilation rate
ventilation; airflow; ambient temperature; ventilation rate