The book of proceedings from the 14th AIVC Conference "Energy Impact of Ventilation and Air Infiltration", Copenhagen, Denmark, 21-23 September 1993.
14th AIVC Conference - Copenhagen, Denmark - 21-23 September 1993
The 14th AIVC Conference - Energy Impact of Ventilation and Air Infiltration, was held in Copenhagen, Denmark, 21-23 September 1993.
Contains 63 papers.
14th AIVC Conference "Energy Impact of Ventilation and Air Infiltration" (Book of Proceedings) | 1993 | English | 620 pp
Test and simulation of air flows in multizone dwelling houses: the alternative method of air flows prediction. | 1993 | English
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.
Preliminary work has indicated that thermography can be used to determine air leakage pathways from or to buildings.
In occupational hygiene the common practice is to use dilution ventilation (MIXVENT) which ideally requires perfect mixing.
Multizone models are a common tool for calculating air and contaminant exchange within rooms of a building and between building and outside.
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.
Comparison of multizone air flow measurements and simulations of the LESO building including sensitivity analysis. | 1993 | English
The LESO building is a three storey, medium-sized office building on the campus of the Swiss Institute of Technology in Lausanne.
This paper describes a laboratory model for the testing and validation of tracer gas measurement techniques.
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.
The traditional description of a flow system with a multicell model, Vc(t)=Qc(t)+p(t), may sometimes be to restrictive.
Visualization of measured three dimensional well mixed zones of temperature in a ventilated space. | 1993 | English
A new model concept has been developed to model the three dimensional energy and mass transfer in an imperfectly mixed fluid.
The paper presents a proposal of numerical procedure for air flow simulation in multi-zone buildings (up to 100 zones).
It has been shown that thermal imaging can give an indication of air flow rates through small cracks.
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
Proximity effects: air infiltration and ventilation heat loss of a low-rise office block near a tall slab building. | 1993 | English
In the mid-1980s, two London architects postulated that deflection of higher speed air from tall slab buildings could increase air infiltration from a neighbouring low-rise block, increasing its associated ventilation heat loss.
The evaluation of ventilation effectiveness measurements in a four zone laboratory test facility. | 1993 | English
Improvements to ventilation systems for the purpose of saving energy may also affect the provision of good air quality.
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.
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.
Distributions of expected air infiltration and related energy use in buildings based on statistical methods with independent or correlated parameters. | 1993 | English
The equivalent leakage area algorithm is used to illustrate the use of statistical simulations to predict distributions of infiltration and energy loss for buildings.
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.