LoginTracer gases are commonly used to evaluate the performance of ventilation systems. One way to reduce the time, complexity, and cost of such experiments is to use the carbon dioxide generated by occupants as a tracer gas.
17th AIVC Conference - Gothenburg, Sweden - 17-20 September 1996
The 17th AIVC Conference - Optimum Ventilation and Air Flow Control in Buildings, was held in Gothenburg, Sweden, 17-20 September 1996.
Contains 62 papers.
Volume content
Ventilation performance evaluation using passively-generated carbon dioxide as a tracer gas. | 1996 | English
The project described in this paper has performed simulations using a multi-zone air flow model (4(COMIS)) of three different passive stack ventilation systems.
Maximum velocity of return flow close to the floor in a ventilated room - experimental and numerical results. | 1996 | English
The problem of sensation of draught in ventilated spaces is connected to inappropriate velocities in the occupied zone. In Scandinavia, velocities higher than 0.15 m/s are said to be an indicator of that occupants are likely to feel discomfort.
A study of the reliability of systems by considering the ability of different systems to maintain a required air flow rate over time is included in a subtask of IEA Annex 27 "Evaluation and Demonstration of Domestic Ventilation Systems".
Natural ventilation studies were carried out within the frame of PASCOOL EC Research Project.
This paper reports on the use of BRE's domestic ventilation model, BREVENT, to predict subfloor and whole house ventilation rates in a BRE/DoE test house.
Since 1985 more than 170 very low energy houses, all of the same type and structure, were built in the Flemish Region, Belgium.
Practical experiences with IR controlled supply terminals in dwellings and offices. | 1996 | English
Ventilation is necessary to provide a good indoor air quality to occupants in office buildings but is however a major energy consumer.
Although the power law has been broadly accepted in measurement and air infiltration standards, and in many air infiltration calculation methods, the assumption that the power law is true over the range of pressures that a building envelope experi
Water use is distributed throughout building structures.
Zonal model to predict air distribution and dynamic concentration of pollutant in ventilated rooms. | 1996 | English
The first part of the paper will show some aspects of experimental research on air distribution in ventilated rooms.
This paper reports on work carried out at BRE to address the need for guidance on designing for natural ventilation via single-sided and cross-ventilation in office spaces and the limits of application in terms of plan depth.
A Probabilistic model of air change rate in a single family house based on full-scale measurements has been developed.
A control system that prevents air from entering an air-handling unit through the exhaust air. | 1996 | English
Traditional air-handling unit (AHU) control systems link the position of the exhaust air damper, recirculation air damper, and outdoor air damper.
The use of local exhaust is considered to be the most effective way to control pollutant dispersion from intense sources, such as in kitchens, in toilets, as well as in copy machine rooms.
This paper describes the ventilation analysis undertaken during the design of a new music centre for which it was desired to avoid the use of air conditioning and conventional ducted mechanical ventilation.
While the use of heat energy has decreased since the middle of the 1970's the use of electricity in the Swedish stock of commercial buildings has increased dramatically.
Many dwellings with natural or gravity ventilation systems suffer from poor airchange rates. In Sweden, especially houses built in the 1960-ies and 1970-ies heated with electric resistance heating and thus without chimneys, are at risk.
Wind towers (scoops situated on the roofs of buildings to catch the wind) have been in use for centuries in the Middle east and Pakistan, to provide ventilation and cooling with minimal mechanical plant.
Full scale measurements of air flow velocities, temperature, intensity of turbulence and air exchange rate are carried out on two rooms with different types of ventilation located in the department of architecture at Chalmers University of Technol