LoginBased on the fundamental flow equations, a set of formulas is derived for air velocities, temperature differences and ventilation rates in relation to number of openings, opening areas, net heat input, building geometry, and temperature stratifica
19th AIVC Conference - Oslo, Norway - 28-30 September 1998
The 19th AIVC Conference, Ventilation Technologies in Urban Areas, was held in Oslo, Norway, 28-30 September 1998.
Contains 55 papers
Volume content
Natural ventilation by thermal buoyancy with several openings and with temperature stratification. | 1998 | English
The paper presents further then an integrated model the supporting methodology that allowsto assess natural urban ventilation conditions both outside and inside constructions.Though some particular aspects arid procedures can be complex and time c
Filters for gaseous contaminants: performance measurement and impact on ventilation systems. | 1998 | English
Filters for gaseous contaminants which are used inside HVAC systems are characterised by means of rated air flow rate, air motion resistance, trend of the mass efficiency versus time and holding capacity of the considered gas.
Control of night cooling with natural ventilation. (Sensitivity analysis of control strategies and vent openings). | 1998 | English
A dynamic simulation of the ventilation processes and the thermal behaviour of an office building is developed.
We examine natural ventilation in buildings with multiple storeys, each storey linked to acommon chimney or atrium, and ventilated using 'top-down chimneys' to draw in relativelyunpolluted air from openings located high above street level.
Non attendance rates among children in Swedish day care centres before, during and after cleaning the indoor air using an electrostatic air cleaning technology --a controlled trial. | 1998 | English
To conduct a controlled trial to test the ability of a newly developed electrostatic air cleaningtechnology (EAC) to improve Indoor Air Quality (IAQ) as defined by levels of air borne particlesand to investigate the potential to reduce non-attenda
Good airtightness of a building can be achieved by the incorporation of an inner sealing layerfor the exterior walls and roofs in the form of a plastic film, which also serves as a vapourbarrier.
A simple interactive design tool for sizing, locating and determining pollution attenuation features of urban air inlets suitable for office buildings. | 1998 | English
This paper identifies successful ways of applying natural ventilation to non domestic buildings locatedin urban areas. Whilst noise and contaminant pollution sources are a problem methods of avoiding theseemissions are discussed.
Ventilation systems using variable airflow are useful in urban areas. Due to outdoor pollutionand the indoor load from pollution or thermal sources, it is important to vary the airflow.
Displacement ventilation in a classroom - influence of contaminant positioning and physical activity. | 1998 | English
This study describes how the air quality in a displacement ventilated classroom can beinfluenced by the position of a contaminating person, and by the activity of a person who walksaround in the room.
Evaluation of thermal performances of residential ventilation systems with heat recovery. | 1998 | English
Ventilation systems with heat recovery offer several advantages such as, of course, energy savings but also the possibility to add acoustic and filtration treatment.
The paper describes the results of a Pan-European survey carried out on identifying thebarriers that restrict the implementation of natural or simple fan-assisted ventilation systems inthe design of new office-type buildings and in the refurbishme
Today, the development of new technologies to improve building envelope performances ishighly encouraged and provides a clear challenge for designers and researchers. In thiscontext several typologies of active envelopes have become very popular.
This paper is concerned with heat and mass transfer through two typical staircases, The firststaircase connects the two individual floors of a two-storey building, and the other connectsthe three individual floors of a three-storey building.
A systematic analysis of recently constructed dwellings in the Flemish Region has beenundertaken within the SENVIVV-project (1 995- 1998) [I]. In total 200 dwellings have beenexamined in detail.
Reentrainment of pollutants from exhausted air - discussion of different types of regulatory requirements. | 1998 | English
In many existing ventilation systems unintentional reentrainment of pollutant, due to improper location of exhaust and air intake, decreases quality of indoor environment.
Building performance evaluation for indoor air quality using occupant contaminant inhalation and attribution to contaminant sources. | 1998 | English
The emissions of building materials like volatile organic compounds and indoor airbornecontaminants such as environmental tobacco smoke expose occupants to hazardowsubstances.
Modern passive stack and ventilated schools - evaluation of ventilation and moisture conditions. | 1998 | English
The aim has been to determine ventilation rates and risk of moisture damage in three modernschools with passive stack ventilation.
The air leakages can have a large impact on heating needs and thermal comfort in industrial buildings. This is sometimes poorly taken into account, both due to the lack of theoretical approach and knowledge of air tightness.
A wind tunnel study was carried out to investigate the airflow through courtyard and atrium building models.