The study of active stack effect to enhance natural ventilation using wind tunnel and computational fluid dynamics (CFD) simulations

The use of a combined methodology of wind tunnel experiments and CFD simulations in order to study the potential of using active stack to enhance natural ventilation in residential apartments in Singapore is demonstrated in this paper. Comparison between the results obtained from the experiments and those from the simulations has been made.

Thermal comfort for naturally ventilated houses in Indonesia

This paper presents an extensive field survey conducted in residential naturally ventilated buildings in Indonesia. The data gathered has been analyzed and revealed that the Predicted Mean Vote equation predicted a warmer thermal perception compared to what people really felt. Under hot and humid tropical climate, people in free-running buildings had a preference for cooler environment and for higher wind speed.

Design, monitoring and evaluation of a low energy office building with passive cooling by night ventilation

For that study, 12 office rooms of a "Solar Optimised Building" in Germany have been monitored. The data have been evaluated by a new method for analysis that deals with short and long term measurements and with building simulation. A comparison between monitored data and simulation of a building with passive cooling by night ventilation is made on a long period.

Energy in air-handling units - results of the AIRLESS European project.

In this paper the authors present the results of the European AIRLESS programme whose aim was to identify the pollution sources in air-handling units, and then avoid or eliminate this pollution. The authors propose several energy efficient ways to provide good indoor air and efficient indoor environment conditioning.

Natural ventilation in high-rise buildings with double facades, saving or waste of energy

For that study , three german buildings with double facades have been monitored for at least one year in order to evaluate their energetic performance. The first building had no air conditioning facilities, the second one had cooling equipment without mechanical ventilation, and the third one had cooling equipment combined with mechanical ventilation.

Impact of airflow profile on indoor air quality - a tropical study -

The simulation of airflow pattern in an office building in Singapore is based on the environmental conditions and the corresponding ventilation parmeters measured on a typical day. The findings of that study are reported in this paper.

Effects of outdoor air conditions on hybrid air conditioning based on task/ambient strategy with natural and mechanical ventilation in office buildings

The aim of this study is to clarify the effects of indoor environmental characteristics of hybrid - natural and mechanical - air conditioning systems in office buildings during intermediate seasons. The other objective was to obtain design data.

Is day natural ventilation still possible in office buildngs with a double-skin facade ?

The efficiency of the natural day ventilation in relation to the double-skin orientation wind speed and wind direction is examined in this paper.

Natural ventilation in a double-skin facade

Multi-storey buildings with double-skin facade are not numerous and there is little experience of their behaviour in operation.In this study the authors analyze the impact of the double-skin orientation, the impact of the wind orientation, and the degree of wind protection on the facades. Simulations were realized too.

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