LoginVentilation is necessary to insure acceptable indoor air quality as well as to protect the building itself against damage due to condensation Ventilation rates however, must not lead to excessive energy consumption In order to comply with these re
Bibliographic database Airbase
AIRBASE is the Bibliographic Database of the AIVC. It contains publications and abstracts of articles related to energy efficient ventilation. Where possible, sufficient detail is supplied in the bibliographic details for users to trace and order the material via their own libraries. Topics include: ventilation strategies, design and retrofit methods, calculation techniques, standards and regulations, measurement methods, indoor air quality and energy implications etc. Entries are based on articles and reports published in journals, internal publications and research reports, produced both by university departments and by building research institutions throughout the world. AIRBASE has grown and evolved over many years (1979 to present day, over 22000 references and 16000 documents available online). For most of the references, the full document is also available online.
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Computational fluid Dynamics (CFD) is a powerfizl tool for analysing problems of air movement and has been increasingly widely used in applications in buildings.
This paper is concerned with measurement of airflow in ducts using an active (pumped) sampling system. The system is capable of sampling tracer gases using either tubes packed with adsorbent or sample bags.
The use of sulphur hexafluoride (SF6), nitrous oxide (N2O) or carbon dioxide (CO2) as tracer-gases have been examined for the measurement of airflow in a two-zone environmental chamber.
The first part of this paper describes a detailed study of the flow of aerosol particles through large openings and the second part describes deposition characteristics of aerosol particles in a single-zone chamber lined with different types of ma
In occupational hygiene the common practice is to use dilution ventilation (MIXVENT) which ideally requires perfect mixing.
The paper presents a proposal of numerical procedure for air flow simulation in multi-zone buildings (up to 100 zones).
One of essential problems of the present research related to building analyses is air flows determination. Air flows not only cause energy consumption but also influence air quality parameters, specially in a multizone (and high) buildings.
The traditional description of a flow system with a multicell model, Vc(t)=Qc(t)+p(t), may sometimes be to restrictive.
The equivalent leakage area algorithm is used to illustrate the use of statistical simulations to predict distributions of infiltration and energy loss for buildings.
This paper describes a laboratory model for the testing and validation of tracer gas measurement techniques.
Improvements to ventilation systems for the purpose of saving energy may also affect the provision of good air quality.
Multizone models are a common tool for calculating air and contaminant exchange within rooms of a building and between building and outside.
It has been shown that thermal imaging can give an indication of air flow rates through small cracks.
Preliminary work has indicated that thermography can be used to determine air leakage pathways from or to buildings.
A new model concept has been developed to model the three dimensional energy and mass transfer in an imperfectly mixed fluid.
Air infiltration continues to play a major role in the ventilation of houses, despite modern trends to increased airtightness of the building envelope. In colder climates, stack effect is the principal driving force for this natural air exchange.
The paper describes measurements made on large doors - 10 to 20 m2 in 2 buildings in Narvik. The air change was measured with the tracer gas (SFg). The method of constant concentration or decaying concentration of the tracer gas was used.
One of the options to increase the energy efficiency of buildings in the cooling season, is to extract heat from the building envelope during the night by natural or forced ventilation.
The LESO building is a three storey, medium-sized office building on the campus of the Swiss Institute of Technology in Lausanne.