One way to prevent cold air from entering through the doorway into a building is to use an air curtain. It is a stream of air blown across the doorway that acts as a thermal barrier.
This paper aims at showing the difference between the two approaches used to evaluate the capture efficiency of a local ventilation system : an experimental research using the tracer gas method ( CO2) and the numerical modelling using CFD code ( STAR-CD). Comparison between the two methods show that the CFD modelling can provide results in good agreement with the experiment.
The aim of that study was to measure the performance of local ventilation for various parameter settings (nozzles and slots REEXS) and to demonstrate the benefit for real working situations.A test cabin was built, to measure the capture efficiency under reproducible cross draughts. Optimised REEXS hoods were used for the experiment : they proved to have a larger capture range compared to the conventional flanged hood. The results were so encouraging that an exhaust installation for 6 welding working places was completed.
The Airways project was set up to provide design guidance and maintain afficient air duct systems, and to bring to light the energy saving opportunities in parallel with health, safety and comfort issues. The results of this work have been published in a book targeted at decision-makers concerned with inddor climate issues. It provides condensed information on better air duct system design and how this can be achieved.
European radon research and industry collaboration concerted action (ERRICCA2) is establishing a European scientific led industrial forum aimed at reducing risks to health from radiation (principally radon) in the built environment. It brings together 35 organisations from 20 countries.
The focus of project Web has been the development of wind enhancement and integration techniques which improve the annual energy yield per installation by concentrating the low to moderate wind speeds (2-5 m/s).
The main aim of the Tip-Vent project was to provide a contribution o the creation of improved boundary conditions for the application of mechanical ventilation systems with good levels of performance. The project has led to a better understanding of the true performance of ventilation systems, why they perform as they do and what improvements are achievable.
The Solvent window was developed to improve visual and thermal comfort in sunny conditions. The glazing system realizes the conversion of short wave solar radiation to convective heat and long wave radiation.
The objective of PV-cooling project was to develop low electricity consumption cooling systems for dwellings and office building, powered through photovoltaic (PV) electricity. Two systems have been developed, one using PV and evaporative air-cooling, the other using PV and ground cooling through buried pipes.
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