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25th AIVC Conference - Prague, Czech Republic - 15-17 September 2004
The 25th AIVC Conference, Ventilation and retrofitting, was held in Prague, Czech Republic, 15- 17 September 2004.
Contains 51 papers
Volume content
Hybrid ventilation is one promising approach to reduce energy consumption in office buildings. On the one hand, a minimum air change rate is supplied to the rooms, even if the windows are closed.
Research has shown that highly efficient solar powered ceiling fans improve thermal comfort and potentially provide health benefits when air conditioning or conventional ceiling fans are not available, such as during the 2003 summer heat waves in
Steel truss structures, covered with a PVC thin sheet of matt light colour, were used in recent time for the construction of three new classrooms in the University of Catania (southern Italy).
Estimation of the effective fresh air supply rate on two storey dwellings employing stack effect ventilation | 2004 | English
This study deals with the ventilation performance of two storey dwellings employing stack effect ventilation to satisfy the overall ventilation requirement. The SRF (Supply Rate Fulfillment) index was used as a ventilation performance index.
Design parameters for the performance assessment of hybrid residential ventilation systems | 2004 | English
This paper summarizes the work within the EU RESHYVENT project in regard to design parameters for the performance assessment of hybrid ventilation systems. A framework for performance assessment based on simulation was developed.
COOLHOUSE demonstrates the use of passive cooling techniques in southern regions of Europe which are aimed at giving comfortable summer conditions in domestic scale buildings without using mechanical cooling systems.
Hybrid ventilation in retrofitted buildings - concepts, strategies and measurements | 2004 | English
How can hybrid ventilation and natural ventilation significantly improve the indoor climate in retrofitted office and education buildings?
This paper deals with the relevance of Computational Fluids Dynamics (CFD) results confronted tomeasurements carried out under uncontrolled thermal conditions.
The retrofit of existing ventilation and air treatment units : an experimental and methodological approach | 2004 | English
Recent studies in Switzerland showed that in large non residential buildings, which can be compared for typology and ventilation needs, the consumption of electricity for mechanical ventilation can vary considerably from case to case.
The purpose of this system is to provide one improved ventilation system allowing significant good indoor air quality, heating (and cooling) energy savings and acceptable thermal comfort on summer, by using especially renewable energy.This concept
This paper addresses the issue of the compliance of residential ventilation systems with building regulations.
Effect of improved air distribution on perceived indoor climate and productivity - A case study in a landscape office | 2004 | English
The aim of this paper is to investigate the effect of improved air distribution on symptoms and self-evaluated productivity in a landscape office in which the air was distributed with ventilated cooled beams.
More than 700 million of measured data, 730 days, 55 dwellings: the HR-VENT hybrid ventilationdemonstration project applied in NANGIS (France) on a set of occupied collective dwellings is closely linked to its stakes.
An idea to build a demonstration house fitted with a hybrid ventilation system arose when Brno University of Technology joined the RESHYVENT project. There has not been much attention paid to the residential ventilation in the Czech Republic.
Within the EU RESHYVENT project four demand controlled ventilation systems have been developed, each one for a specific application field. The scientific support work for the industries has been reported in a number of documents.
Indoor air quality in classrooms : field campaign by questionnaires and measurements | 2004 | English
A research project aimed at investigating IAQ and thermal, acoustic and visual comfort was carried out in Italian high school and university classrooms.
The article describes the influence of the supply air devices that are part of hybrid ventilation system which is being developed within a EU funded project RESHYVENT as a part of this project, on thermal comfort in living-room of a three-bedroom
Demand controlled ventilation applicable for any air tightness level and occupancy ? | 2004 | English
The Dutch housing stock consists for about 70% of single family houses with an average N50 of about 7-9 ACH and for 30% of apartments with an average N50 of about 3-4 ACH.New single family houses are much more airtight.
The paper describes the development of unsteady pulse pressurisation techniques for measuring the leakage of buildings.