In that study, the existing recommended correlations are validated in a full-scale experimental facility representing an office space. New correlations are developed as well, for floor surfaces. Validation results show that the floor convection correlations expressed as a function of volume flow rate are much stronger than the ones expressed as a function of a temperature difference between the surface and local air.
The aim of that experimental campaign was to evaluate the potential of natural ventilation in the urban environment on the one hand and to better understand the air flow and thermal phenomena in deep urban canyons. The mechanism of the air flow and temperature distribution inside the canyon is extensively analysed in that paper and the specific phenomena that determine the wind speed and direction inside the canyon are described in details.
For that study, a RANS equation approach is applied to wind driven natural ventilation in a cubic building. Two different models are considered. The velocity and pressure distribution inside and around the building are determined along with the ventilation rate for three different configurations : cross-ventilation, single-sided ventilation with an opening on the windward wall and single-sided ventilation with an opening on the leeward wall.. The numerical results compared with the experimental data show a good agreement.
An analytical and a numerical predictions of heat and pressure drop characteristics of a floor with the ventilating ducts are presented in that paper. The experimental results are used for the validation of the models. An acceptable accuracy between the computational simulation and measured performance data is obtained.
For that paper, a full-scale ventilated roof component was tested under real climatic conditions.two key constructional parameters were examined during the tests : the air gap height and the application or not of a layer of a radiant barrier. The performance of the component was assessed by direct comparison to a simultaneously operating conventionally constructed roof. The experimental results are presented.
The potential use of natural ventilation as a passive cooling system in new building designs in a Turkish midsize city, Kayseri, was investigated by CFD, using the Fluent 6.2. program..The simulation results are presented, they suggest that natural ventilation can be used to provide a thermally comfortable indoor environment during the summer season in that area.
For the investigation of the velocity and temperature fields in a mechanically ventilated enclosure, a full-scale experimental and CFD methods are used. The detailed airflow characteristics have been measured in three cases of ventilation air temperature : an isothermal case, a hot case and a cold case. Two CFD models have been validated a RANS modelling and a LES modelling. The first one provides results in better agreement with experimental data except for the cold case, whereas the second one underestimates the expansion of the jet in the three cases.
Optimizing the building energy efficiency in tropical climates by reducing the period of air-conditioning thanks to natural ventilation and a better bioclimatic design is the aim of that paper. A new modelling approach is proposed. In order to compare the performance of ventilation function of the opening distribution, twelve living spaces with different configuration of openings have been studied. The results and discussion are presented.
In this paper, for the calculation of the convection flow, the influence of the cooking process is taken into account, the actual measured plume characteristics of typical kitchen appliances are presented during cooking mode. The measurements that have been conducted show that the generic plume equation gives a suitable platform for practical applications during the cooking mode too.
In this paper, the effect of inclination of absorber on the airflow rate has been investigated in a solar induced ventilation system using roof solar chimney (RSC) concept. According to the results of the developed solution of the authors, it appears that the optimum absorber inclination depends upon the latitude of place, it varies from 40 to 60. The experimental investigations tally with the theoretical results
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