An experimental study on airflow in the cavity of a ventilated roof

Lee, Sunwoo; Park, Sang Hoon; Yeo, M. S.; Kim, Kwang Woo

doi:10.1016/j.buildenv.2008.09.009

Cited by 70 publications

(33 citation statements)

References 7 publications

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“…7, the gelation time of sodium silicate-based concrete sealers decreases as the testing temperature increases, which is also in accordance with expectation. Clearly, if a concrete sealer is used in summer, when the surface temperature of concrete roof is easy to reach 70-80°C [33,34], some retarders should be added into the sealer to retard the gelation process for a deeper penetration of the concrete sealer and thus a better waterproofing performance.…”

Section: Gelation Timementioning

confidence: 99%

The investigation of factors affecting the water impermeability of inorganic sodium silicate-based concrete sealers

Jiang

Xue

Zhang

et al. 2015

Construction and Building Materials

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Section: Gelation Timementioning

confidence: 99%

The investigation of factors affecting the water impermeability of inorganic sodium silicate-based concrete sealers

Jiang

Xue

Zhang

et al. 2015

Construction and Building Materials

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“…An unfavourable microclimate forms in the upper floors of a built-up roof (one without air space) during the summer, which makes the roof type the least effective (Chwieduk 2011;Sunwoo et al 2009;Susantia et al 2011).…”

Section: Introductionmentioning

confidence: 98%

Mathematical Model of the Thermal-Air Regime of a Ventilated Attic

Piotrowski

Stroy

Olenets

2015

Journal of Civil Engineering and Management

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This paper presents the developed mathematical models that characterize the thermal-air regime of a ventilated attic in the summer and winter seasons. The relevance of the mathematical models was shown and examples of applying these models to solve some engineering problems were presented. Mathematical models can be used to analyze and evaluate changes in the temperature and heat flux (the radiant and convective component) along the air movement in the attic and to select the materials for the roof and floor, as well as for the calculation of ventilation for different climatic conditions.

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“…[10] evaluated the influence of factors as cavity ventilation, the slope of the roof, intensity of solar radiation, the size and flgure of a cavity, and panel proflles, by investigating airflow and temperature distribution in the cavity, to improve the cooling effect of ventilation in the cavity of the roof They used thermoanemometer ( Velocicalc Plus model 8360) to measure air velocity which is a high-precision multifunctional instrument. [10] evaluated the influence of factors as cavity ventilation, the slope of the roof, intensity of solar radiation, the size and flgure of a cavity, and panel proflles, by investigating airflow and temperature distribution in the cavity, to improve the cooling effect of ventilation in the cavity of the roof They used thermoanemometer ( Velocicalc Plus model 8360) to measure air velocity which is a high-precision multifunctional instrument.…”

Section: Introductionmentioning

confidence: 99%

Improvement of thermal homogenization using multiple swirling jets

et al. 2012

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The aim of this study is to examine different blowing configurations of multiple swirling jets for use it in terminal units of ventilation applications. The influence of several parameters such as the inclined vanes of diffuser and the sense of rotation of the single or multiple swirling jets, their number and their arrangement on the flow resulting dynamically and thermally is experimentally investigated. Flow rate was adjusted at Reynolds numbers, Re0, ranging from 104 to 30.103. The current study is carried out under uniform heat flux condition for each diffuser at Reynolds number of 30.103, the air being the working fluid. Experiences concerning the fusion of several jets show that the resulting jet is clearly more homogenized under swirling influence. The findings of this study show that the gap between the jets and their sense of rotation relative to the central jet, affects the quality of the homogenization of ambiance. Among the studied different configuration, the one which consists of a swirling central jet controlling the behavior of six swirling jets in counter-rotation is shown to be the most effective in terms of thermal destratification

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An experimental study on airflow in the cavity of a ventilated roof

Cited by 70 publications

References 7 publications

The investigation of factors affecting the water impermeability of inorganic sodium silicate-based concrete sealers

The investigation of factors affecting the water impermeability of inorganic sodium silicate-based concrete sealers

Mathematical Model of the Thermal-Air Regime of a Ventilated Attic

Improvement of thermal homogenization using multiple swirling jets

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