The results of the Ashrae methodology for thermal comfort study , applied in Taiwan, are presented in that paper. The field experiments were conducted in 10 naturally ventilated and 26 air-conditioned classrooms. 1294 questionnaires were fulfilled by individuals in seven universities. The results show that air temperature, air movement and mean radiant temperature have significant influence, whereas humidity has no statistical significance.

The aim of that paper was to study the energy loss related to air leakage in duct systems. The leakage measurement setup was produced according t NEN-EN standards and the evaluation of data has been conducted by using power law model. Measurements were made on single circular ducts, flanged joint rectangular ducts, circular beaded slip joint ducts and rectangular flanged and drive slip joint ducts. The results show that the most of air leakage is from the joints. The air leakage can be improved by about 50 % when using sealing gaskets.

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.

For that study, a prototype of the rooftop turbine ventilator powered by hybrid wind and photovoltaic energy is developed. For the investigation of the prototypes ventilation performance, a low-speed wind tunnel experiment is performed. The experimental results are presented, they indicate that the installation of an inner fan at low outdoor wind speed (0 and 5 m/s) increases the ventilation rate whereas its installation at high outdoor wind speed does not improve the ventilation rate.

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.