LoginA test room with a Displacement Ventilation System was built. Temperature control was provided with a DDC (Direct Digital Control) System, controlling the air volume and the air inlet temperature.
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
Dispersion pattern of contaminants in a displacement ventilated room - implications for demand control. | 1991 | English
A passive tracer gas technique has been used in an experimental study of the distribution of contaminants in a room with displacement ventilation.
This article discusses the application of tracer gas methods to industrial hygiene investigations.
A conference room has been converted to temperature- and carbon dioxide controlled ventilation. A number of tests have been conducted with the system in different load conditions.
This paper reports the design, development, calibration and testing of a fast-response, multi-channel tracer gas concentration measuring instrument.
Mechanical devices such as exhaust fans and air handlers interact strongly with natural infiltration.
Is it possible to translate a computed flow field to a design case with different physical dimension?
In Halmstad a multi-apartment house has been built with air carried heating. Fresh air was used as the only heat carrier. To improve the air quality it was decided not to use circulation flow, which is normally required for air carried heating.
The 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.
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.
A new passive tracer gas method for ventilation measurements is described. The method utilizes passive tracer gas release from aliquid perfluorocarbon compound contained in a glass vial, equipped with a teflon membrane.
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.