Vol1: Twenty four papers from the tenth AIVC Conference, titles as follows: “Keynote Speech”; “Annex 14 - Condensation and Energy”; “Annex 18 - Demand Controlled Ventilating Systems”; “Trends in Airflow Design and
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.
10th AIVC Conference - Progress and trends in air infiltration and ventilation research (Book of Proceedings) | 1989 | English
The use of passive perfluorocarbon technique for air flow measurements has been developed and tested. The building and testing of the system took approximately one year. The reproducibility of the analysis was tested during the period.
A test room with a Displacement Ventilation System has been built. Air velocity and temperature profiles were measured at different places in the room under summer and winter conditions.
This paper describes a simulation program which was developed for the modelling of air-conditioning systems and conditioned spaces in industrial buildings.
Moisture and mould in buildings have become fairly common problems in Italy, particularly since regulations aimed at energy conservation have been enforced in the seventies.
Ventilation in a building enables to renew the air it contains by means of a natural exchange of air (depending on weather conditions and climate) or a forced exchange using mechanical appliances.
This paper describes tracer gas methods and equipment developed to measure infiltration and inter-zone air flow rates in New Zealand houses.
The h,x-diagram as representation of measurements of ranges of comfort in a long duration test. | 1989 | English
A 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.
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.
It is particularly important to be aware of the air flow pattern in a building when determining indoor air quality problems or calculating space conditioning loads for energy consumption.
The AIVC nowadays is an established Centre on infiltration and ventilation research. It is well known throughout the world. This position has not been reached easily. But years of hard working and critical managing of the Centre were a necessity.
The COMIS workshop (Conjunction of Multizone Infiltration Specialists), using a multi-national team, is planning to develop a reliable, smooth running multizone infiltration model on a modular base.
The distribution of wind pressure on a building envelope is governed by the size and shape of the structure and the turbulence characteristics of the wind.