LoginIn this paper, the ventilation of a “crêpe” paper-processing workshop containing dryers, which generate a high thermal load, is considered. Displacement ventilation has been used for many years in industries with high thermal load.
21st AIVC Conference - Hague, Netherlands- 26-29 September 2000
The 21st AIVC Conference, Innovations in Ventilation Technology, was held in the Hague, Netherlands, 26-29 September 2000.
Contains 60 papers
Volume content
Design of ventilation systems in industrial buildings. A computational approach of displacement ventilation in paper industry. | 2000 | English
Schaakwijk project in Utrecht, The Netherlands. Passive ventilation strategy using a sun room. | 2000 | English
There has been a growing interest in the use of natural ventilation in buildings to supplement orreplace mechanical air supply systems.
The relative importance of ventilation in the energy balance of buildings has been increasing,as a consequence of control of heat exchanges through the envelope and internalgains.
The development of guidelines for performance based innovative mechanical ventilationsystems in residential and commercial buildings is included in the European Commissionproject TIPVENT Towards Improved Performances of Mechanical Ventilation Syst
The Building Air Tightness is an important parameter on ventilation systems performanceand energy losses.Yet, the total amount of leakage is as important on performances as their effective positionin the room.Some calculations have been run accord
Infiltration has traditionally been assumed to affect the energy load of a building byan amount equal to the product of the infiltration flow rate and the sensible enthalpydifference between inside and outside.
The humidity of room air is a necessary influence of design under the aspects of thermalbehavior, technology and conservation.The moisture absorption in the walls through sorptive materials or dehumidification on thecold window surface by dew poin
The use of heat pumps to induce airflow on hot days in otherwise passive ventilation systems. | 2000 | English
The paper presents results from a wider study into providing displacement ventilationin urban areas by taking air into buildings from the top without the use of fans.Results from large scale experimental work are given.
The operation and performance of forced-air ventilation systems with the aid of a dynamic modeling and simulation computer program are presented.
This paper aims to identify major characteristics of hybrid ventilation systems, whereby a clear distinction is made between ventilation for Indoor Air Quality control and ventilation as part of a strategy for control of thermal comfort in summer.
Determination of the dimensioning value of the airflow when designing ventilation systems. | 2000 | English
Before starting to design an HVAC installation for treatment, supply and exhaust of air to and from a building the needs should be listed, transformed to requirements and their consequences analysed.
The paper presents a short description of the measurement program and the data collected for the “SynergieHaus”-project initiated by PreussenElektra and partners (now merged to E.ON).
Significant limitations in applying computational fluid dynamics (CFD) to predict room air distribution: guidelines for beginners. | 2000 | English
Computational Fluid Dynamics (CFD) has been used to predict the indoor environment airflow and overall ventilation effectiveness of natural or mechanical air distribution systems.
In natural ventilation systems, fresh air is often provided through opening of windows, andthere is a wide range of possibilities with regard to selection of window type and position inthe facade.
Derivation of simple ventilation and thermal models for a naturally ventilated auditorium with high internal heat gains. | 2000 | English
Measurements of ventilation rates and internal temperatures have been recorded in a naturallyventilated auditorium with high intermittent heat gains for a wide range of weather conditionsat a UK site.
Ventilation performances in French dwellings: results from field observations and measurements. | 2000 | English
This paper presents a recent field measurement study undertaken in 1999 on 73 recent Frenchdwellings.
The target in this study was to decrease the energy use for transportation of air (fanenergy) with a factor of three.
The estimate of actual air change rates considering atmospheric turbulence isintroduced. The starting point is the spectral description of turbulence - Kaimalspectrum was used in order to consider the height above ground.
The move towards improving building air-tightness to save energy has increased theincidence of poor indoor air quality and associated problems, such as condensation onwindows, mould, rot and fungus on window frames.
Ventilation needs in dwellings must be determined on the basis of both requirements to theindoor air quality and necessary control of moisture conditions.