LoginA new visual method is yielded by a particular application of Mollier's h,x-diagram. Point fields (temperature and humidity) lead to a significant improvement upon previous graphic methods.
10th AIVC Conference - Espoo, Finland - 25-28 September 1989
The 10th AIVC Conference - Progress and trends in air infiltration and ventilation research, was held in Espoo, Finland, 25-28 September 1989.
Contains 52 papers.
Volume content
The h,x-diagram as representation of measurements of ranges of comfort in a long duration test. | 1989 | English
General feature of a two-dimensional isothermal mean flow inside a ventilated room with a wall mounted obstacle. | 1989 | English
This paper deals with the elaboration and the validation of a userfriendly numerical program (EOL) for the calculation of the ventilation patterns inside industrial premises. After the running-in.
In Sweden, the energy crisis in the early seventies resulted in attempts to lower the air change rate in buildings to reduce energy consumption.
The paper describes the development in airflow simulations in rooms.
A comparison between the step-up, step down and pulse injection techniques for the measurements of the mean age of air. | 1989 | English
A comparison of three injection manners, step-up, step-down and pulse, for determination of the mean age of air was made by using nitrous oxide and sulphur hexafluoride as tracer gases.
Ventilation, air flows in buildings and indoor air quality - R D & D and developments in Germany. | 1989 | English
Ventilation, infiltration, indoor air flows and air exchanges determine two aspects of fast growing interest: the energy balance of buildings and the indoor environment.
The indoor climate and ventilation were measured in 50 dwellings with various ventilation systems. The health and comfort of people living in the dwellings were studied with a simultaneous questionnaire.
In the "Stockholm Project", different blocks of multifamily buildings have been extensively monitored for about three years. Temperatures, airflows and electricity use have been registrated each hour.
Pressurization, or depressurization, of buildings is a tool to assess the airtightness of building envelopes. A common working pressure is 50 Pa, and the airtightness is expressed in terms of the number of air changes per hour at 50 Pa.
Tracer gas techniques have become widely used to measure the ventilation rates in buildings.
The IEA Annex 18 Demand Controlled Ventilating Systems-(DCV-Systems) with 9 participants are just in the middle of the work.
What does the designer of a future energy-efficient building ask of the air flow specialist? - Static predictions of air flow patterns and optimization of thermal comfort and indoor air quality at design conditions will not be enough for him.
Annex 14 -Condensation and Energy- started in April 1987, with a take of meeting in Utrecht, The Netherlands. The annex itself was born after a moisture-workshop in September 1985 at the Laboratory of Building Physics, KULeuven, Belgium.