The effect of the wind speed velocity on the stack pressure in medium-rise buildings in cold region of China

Khoukhi, Maatouk; Yokota, Hiroshi; Liu, Jing

doi:10.1016/j.buildenv.2005.11.003

Cited by 37 publications

(22 citation statements)

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“…Several methods have been developed to predict ventilation performance in buildings, namely analytical models, empirical models, small-scale experimental models, full-scale experimental models, multizone network models, zonal models, and Computational Fluid Dynamics (CFD) models (Chen 2009). The multizone models, such as CONTAM (Walton and Dols 2013), are the main tools for predicting ventilation performance in an entire building and have been widely used to predict airflow, pressure, and contaminant distribution in buildings under wind and stack effect actions (Khoukhi et al 2007;Maatouk 2007;Sohn et al 2007;Janssen 2003;Bojic and Kostic 2006). Because the uncertainty that affects the results is mainly due to the quality of the input data it would be important to compare the computer code results with measurements (Janssen 2003) and/or use field measurements (eg., air-tightness measurements) to fit the model coefficients (Labat et al 2013).…”

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confidence: 99%

Numerical evaluation of ventilation performance in children day care centres

et al. 2014

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Modelling of ventilation is strongly dependent on the physical characteristics of the building of which precise evaluation is a complex and time consuming task. In the frame of a research project, two children day care centres (CDCC) have been selected in order to measure the envelope air permeability, the flow rate of mechanical ventilation systems and indoor and outdoor temperature. The data obtained was used as input to the computer code CONTAM for ventilation simulations. The results obtained were compared with direct measurements of ventilation flow from short term measurements with CO2 tracer gas and medium term measurements with perfluorocarbon tracer (PFT) gas decay method. After validation, in order to analyse the main parameters that affect ventilation, the model was used to predict the ventilation rates for a wide range of conditions. The purpose of this assessment was to find the best practices to improve natural ventilation. A simple analytical method to predict the ventilation flow rate of rooms is also presented. The method is based on the estimation of wind effect on the room through the evaluation of an average factor ( ) ¥ * 2 Δ / P ρ and on the assessment of relevant cross section of gaps and openings combined in series or in parallel. It is shown that it may be applied with acceptable accuracy for this type of buildings when ventilation is due essentially to wind action. Keywordschildren day care centre, air permeability, tracer gas, PFT,

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confidence: 99%

Numerical evaluation of ventilation performance in children day care centres

et al. 2014

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“…Stack effect is the airflow in and out of buildings mainly driven by the difference in indooreoutdoor air temperature. Some researchers ( [6] and [7]) discussed the impact of stack pressure on the air infiltration through building doors. Surface pressure on a building wall is the pressure imposed by the wind.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive modeling of airflow rate through automatic doors for low-rise buildings

Mahajan

Cho

Shanley

et al. 2015

Building and Environment

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“…Ventilation is commonly the most efficient method but can be disadvantageous for requiring more energy consumption (Khoukhi et al, 2007). At present, air purification remains to be one of the most promising air-cleaning methods to involve diverse control techniques, e.g., adsorption by activated carbon, photocatalytic oxidation (PCO), biological treatment (biofiltration, bioscrubber, vegetation approach, etc.…”

Section: Introductionmentioning

confidence: 99%