Twenty five cellular offices in the Wilkinson Building at the University of Sydney, Australia are ventilated through operable windows and doors and have been retrofitted with a supplementary reverse cycle cooling/heating system with an occupant co
Volume 1: 2002-2003
International Journal of Ventilation, Volume 1, 2002-2003
A Study of a Mixed Mode Environment in 25 Cellular Offices at the University of Sydney | 2003 | English
Analysis Methods for Natural and Hybrid Ventilation : a Critical Literature Review and Recent Developments | 2003 | English
This paper is based on the results of Subtask B of the HybVent Project. It presents a critical review of the literature and recent developments in analysis methods for natural and hybrid ventilation in buildings.
Calculations and Notes on the Quadratic and Power Law Equations for Modelling Infiltration | 2002 | English
Calculations using CFD are presented for adventitious openings in which the flow is not fully developed. It is shown that the quadratic equation performs significantly better than the power law i.e.
Measurements of metabolic carbon dioxide concentration made in four classrooms in two schools are reported for both occupied and unoccupied periods.
In the following, measurements of CO2 levels in seven classrooms in four schools are reported. Measurements were taken for approximately one week in each classroom during the heating season and the time-varying ventilation rates estimated.
Results of a CFD simulation of the wind-assisted stack ventilation of a single-storey enclosure with high and low-level ventilation openings are presented and compared with both the laboratory measurements and the analytical model of the flow and
The paper presents examples of hybrid ventilation and control strategies in office and educational buildings from the IEA ECBCS Annex 35 HybVent case studies.
Using the wind pressure difference method to estimate the cross ventilation potentials of a building at a particular site, the appropriate wind frequency data at the building site are important (Aynsley et al, 1977, Su, 2001).
Experimental Study on Performance Evaluation of Ventilation Systems in a Test House | 2002 | English
Ventilation is one of the most important measures to dilute indoor air pollutants.
The use of ceiling mounted circulating fans to provide air movement for cooling in industrial premises and animal houses is particularly essential in warm, humid climates.
Five Years of Laboratory and In Situ Test Experiences to Verify Thermal Comfort Conditions in an Innovative Hybrid Ventilated Building | 2003 | English
Climatisation and natural ventilation concepts are today, in most countries, considered to be an essential aspect of the building project. In fact they are utilised to guarantee summer thermal comfort and indoor air quality control.
A hybrid ventilation system combines both mechanical and natural ventilation modes.
In the design of natural ventilation systems, there is a wide range of possibilities with regard to the selection of window type and the positioning of windows in the facade.
This paper focuses on hybrid ventilation performance in an office building. It presents measurement results from the new headquarters of the company Bang & Olufsen, which served as one of the case study buildings in IEA ECBCS Annex 35.
This paper reports the results of computer simulations of a hybrid-ventilated building using ESP-r (Environmental Systems Performance for research). A new school building in Norway was used for this simulation study.
This paper describes the development of a simplified tool which should be used at the early design stage for predicting air ventilation rates in a building.
Numerical Analysis of Hybrid Ventilation Performance Depending on Climate Characteristics | 2003 | English
This study, which formed part of the Annex 35 Hybrid Ventilation in New and Retrofitted Office Buildings project, was completed at LEPTAB and supported by the French Research Ministry and the ADEME (Agence De lEnvironnement et de la Matrise de lEn
Numerical Study of Hybrid Ventilation of Apartments in a Densely- Populated Urban Neighbourhood | 2003 | English
The demand for buildings with high quality indoor environments is growing, especially in developing countries, where more and more energy will be consumed in the near future.
The basic mechanism for natural ventilation in a building involves air flowing through purpose-made ventilator openings.
Buildings are aired to evacuate indoor pollutants, in particular those produced by the occupants. CO2 is a good indicator of occupancy, as long as there is no other significant source. This is the case in most buildings.