The purpose of the study was to experimentally test performance four types wall-mounted mechanical ventilation exhaust air outlet devices. A full-scale mock-up a segment an external wall with constructed. tested devices include gravity louver, fixed-blade louver plate, and nozzle. assessment included two experiments over airflow rate range 25–94 l/s at isothermal conditions no influencing wind:...

While EER (Exhaust Energy Recovery) has been widely pursued for improving the total efficiency and reducing CO2 emissions of internal combustion engines, the maximum regenerated power from the exhaust energy has been proposed and calculated in terms of endoreversible cycle. In this paper, based on the experimental data of an EER system installed on a light duty gasoline engine, the exhaust ener...

High-concentration oil mists from machining plant equipment can cause serious health problems for workers. The concentration of mist is generally reduced by ventilation and purification systems. However, the coupling relationship interaction between systems are not well understood. This study based on an actual factory. First, CFD simulation method was validated experimental data. Secondly, inf...

background: the traditional cyclone has been developed for the removal of airborne silica particles from local exhaust ventilation (lev). the objective of this research was to evaluate the effects of velocity and particles load on efficiency of cyclone in the stone crushing units at azendarian area. methods: after the designing and installing the traditional cyclone, downstream and upstream sam...

In the SARS epidemics in 2003, cluster of cases occurred in high-rise residential(HRR) building blocks, especially in Hong Kong, which gave rise to the concern of the possible roles of air flow. In this paper, the multiple parallel airborne transmission routes are discussed. In particular we closely investigated one of the most likely virus-spread paths, which is related to single-side ventilat...

The special emergency plan for subway fires in China stipulates that when a fire occurs at train stop, it is necessary to confirm whether the mode of tunnel ventilation system implemented. Because setting and smoke exhaust station track area, rail top cannot operate same time. To study influence on control stops station, we take an island as example. A 1:1 full-scale numerical model established...

This paper studied the performance of a floor-supply displacement ventilation system using computational-fluid-dynamics (CFD). The experiment was carried out in a full-scale environmental chamber with a floor-supply system to obtain reliable flow information for the validation of a CFD program. The validated program was used further to evaluate the performance of the floor-supply displacement v...