Parametric studies of facade designs for naturally ventilated residential buildings in Singapore were carried out in view to optimize facade designs for a better indoor thermal comfort and energy saving. Thermal comfort regression model for naturally ventilated residential buildings in Singapore was used to evaluate the various facade designs . The simulation results are presented along with the conclusions.

Detection and diagnosis of multiple faults in VAV systems using principal component analysis (PCA) and joint angle analysis (JAA) are presented in that paper. With the multiple faults separated into different locations, joint angle analysis is used to isolate the faults one by one according to corresponding local models.

For that study, a model has been developed in order to calculate indoor concentrations of PM 2.5. Nitrate, sulfate and black carbon in residences, taking into account modeled air exchange rates and outdoor concentrations measured far and close to those residences.

An investigation was conducted on selected locations in air handling units (AHUs) to identify common mold species found on these locations and determine whether the operating condition of AHUs is related to that mold contamination. A microbial sampling protocol including interpretations of sample results is presented in that paper.

The authors have assessed a new method whose aim is to measure particles infiltrations in individual homes. That method consists in applying a recursive mass balance model to continuous indoor and outdoor concentration measurements . But this method does not allow the estimation of air exchange rate.

This study presents a prediction of the space-time evolution of airborne pollutant dispersion following the accidental rupture of a containment enclosure (fume cupboard, glove box, pressurized gas duct etc.). Gas tracing experiments have been carried out along with multidimensional simulations using CFD tools. Comparisons between experimental and numerical results largely agree.

The Carbon dioxide (CO2) and cubic-feet-per-minute (cfm) based methods are used to verify the amount of outdoor-air ventilation being delivered to building occupants , and to check that the minimum ventilation required by ANSI/Ashrae standard 62 is being provided too. Data quality varies significantly between CO2 and cfm based ventilation assessments. In that paper the advantages and drawbacks of each method are discussed.

This article presents a ventilation strategy that combines ceiling exhausts, bench exhausts, and ceiling radiant-cooling panels . It appears to provide very good thermal conditions and large energy savings for a typical laboratory. Simulations results are presented.

Draft and non-uniform fresh air distribution are common problems in winter ventilation, especially for large animal buildings. Thermal-based anemometers have difficulties in accurately measuring non-isothermal and low-speed indoor airflow. A new technology, particle tracking velocimetry (PTV), which uses particles and their images to study indoor airflow, can overcome the traditional limitations in indoor airflow measurement. A PTV system was used to characterize indoor airflow in a full-scale ventilated room under nonisothermal ventilation conditions.

In this paper, airflow in a slot-ventilated enclosure is numerically studied at Reynolds number 5024, which is based on inlet height and mean velocity at the inlet. Both Reynolds averaged Navier-Stokes (RANS) simulation and large eddy simulation (LES) are applied, and numerical results are