LoginThe passive perfluorocarbon method (PFT-method) has been successfully applied in ventilation measurements in rooms. The method is, in principle, also applicable to air flow measurements in ventilation ducts.
12th AIVC Conference - Ottawa, Canada - 24-27 September 1991
The 12th AIVC Conference - Air movement and ventilation control within buildings, was held in Ottawa, Canada, 24-27 September 1991.
Contains 88 papers.
Volume content
The knowledge of IEA-Annex 14 'Condensation and Energy' has been applied to develop a new strategy for humidity control in dwellings. The presented control element assures safe prevention from mould growth at a minimum energy consumption.
The study recommends adoption of the new higher ventilation rates, but with the use of alternative occupancy densities.
The use of test chambers for characterising the emissions of volatile organic compounds from indoor building materials. | 1991 | English
Increasing interest is attributed to the problem of the accumulation of organic vapours emitted from indoor building materials due to an effective insulation of buildings with low ventilation rates.
Field investigations were undertaken on five houses to determine the potential for improved performance and lower costs through the use of a demand controlled ventilation (DCV) systems.
The possibility of unacceptable internal air pollution levels can cause concern at the design stage given the potential for cross contamination between building exhausts and ventilation intakes is there.
The present work is an investigation of ground heat exchangers for the air-conditioning of the supply air to residential buildings.
Measurement of the entrance length and friction factor of ducts using tracer gas techniques. | 1991 | English
We describe the use of constant injection and pulse injection techniques for measurement of airflow in a duct. Tracer-gas measurements were compared with measurements made using a pitot tube and a hot-wire anemometer.
This paper describes the guidelines prepared by NIST for GSA.
A new handbook on measurement techniques related to airflow patterns within buildings. | 1991 | English
A new handbook, describing in details the measurement techniques which could be used to better understand the infiltration and ventilation in buildings is presented.
Performance analysis of demand controlled ventilation system using relative humidity as sensing element. | 1991 | English
This paper evaluates the suitability of humidity-controlled house ventilation system to determine (i) the effectiveness of relative humidity as a sensing element, and (ii) the operating and performance characteristics of such ventilation strategy.
Conventionally used thermal anemometers are able to measure velocity, but cannot determine direction.
The measurements reported in this paper were carried out in a mock up of an office room, ventilated by a commercial supply air terminal consisting of 84 nozzles (characteristic dimension SqRoot of As = 0.0975 m).
Kitchen hoods are frequently found in Belgian kitchens. Most of them have as only function intensive ventilation during certain cooking activities.
A commercially available humidity controlled natural ventilation system (Aereco) has been installed in the framework of a CEC demonstration project in 3 apartment buildings in France, the Netherlands and in Belgium.
This report describes tracer gas measurements of the local mean age of air at different locations within an office room.
A test programme has been designed to evaluate the performance characteristics of sensors for the automatic control of ventilation rates.
Simplified, physical models for calculating infiltration in a single zone, usually calculate the air flows from the natural driving forces separately and then combine them.
The work in this paper contributes to the work in the IEA - Annex 20 "Air Flow Patterns within Buildings" and presents a series of full-scale measurements of the concentration distribution in a room with isothermal mixing ventilation.
Modern one-family houses in Scandinavia are often ventilated by an exhaust fan. Most of the outdoor air probably enters through whatever cracks and openings there are and only a small part enters through the supply vents in many of these houses.