This paper reports experimental study of air quality in the kitchen of the CSTB experimental house MARIA. These experiments are transition between measurements in an experimental cell and in situ measurements. Indeed, ventilation conditions are controlled via either a hood or via a mechanical ventilation at the exhaust. The kitchen studied is also equipped with a pan on an electric cook-top which temperature is controlled. However, unlike measurements in test cells, wall temperatures cannot be controlled. Impact of cooking vapour on indoor air quality is analyzed using a tracer gas (SF6).
At the Norwegian Building Research Institute, Division Trondheim, we have been working on a research project involving wind pressure measurements. The main goal of the project is toget more information about the influence of wind pressure on the heat loss from timber frame walls with ventilated airspace between the wind barrier and the cladding. The project is divided into three parts: calculations, hot-box measurements and wind pressure measurements.
The test house is located in the Institute's laboratory hall. This new facility (see above) will mainly be used for the study of alternative ventilation strategies in tight houses. However it will also be used for basic air infiltration research. The main reason for building thehouse indoors, is to obtain a controlled environment both with regard to the ambient temperature and the flow rate of outdoor air supplied.
The modern trend towards more airtight energy efficient housing requires additional care in providing controlled ventilation. Passive Stack Ventilation (PSV) is one way of providing the necessary control. The Building Research Establishment (BRE) is carrying out research into the performance of PSV systems in dwellings. Several different PSV systems were installed in a test house and the flow velocity through them measured under a range of meteorological conditions. The results of these tests are presented and the effect of bends in the duct and duct diameter are discussed.
Flow measurements using rracer gas reclmiques were made on tile exterior doorway of a test house for indoor-outdoor temperature differetJces of 0.5-45 K. The time for door opening and closing was constant at 3.75 s, and fully open hold time varied from 0.5 s to 120 s. Predictions of a variable density sready flow model were in good agreement with the measurements when adjustmenrs were made for the time-varying size of the opening and for the effect of cross-stream mixing between the incoming and outgoing air streams.
In this study the multifamily demonstration buildings with demand controlled ventilation systems are discussed. Furthermore,the heating systems together with demand controlledventilation are looked at.There are given examples of the centralized supply and exhaustventilation system, the centralized exhaust ventilation systemand the apartment based ventilation system. All the Systemsare mechanical, natural ventilation is not discussed here. Incold climates natural ventilation, i.e.
Login