The 1st Expert meeting of the IEA EBC Annex 62- Ventilative Cooling will be held from Wednesday April 23 to Thursday April 24, 2014 in Lausanne, Switzerland.
IEA EBC Annex 62 has now entered the working phase with as first focus the preparation of the first Annex deliverable, the State of the Art report. At the 1st expert meeting, the first draft will be discussed with the intention to have the final version ready before the second expert meeting in September 2014. In parallel, research work on the subtasks according to the work plan will be initiated.
AIVC aims to play a central role in the ventilation and infiltration community with respect to the dissemination of information, either with its conferences or workshops, or with the material available on its website. The annual conferences continue to be greatly appreciated: 96 % of a sample of 76 conference attendees rated the 34th conference as excellent or satisfactory, 91% would recommend it to others. As you will see in this newsletter, we are working to uphold this quality for our future events.
There is a trend to perform more ventilation and air infiltration measurements in buildings, either to strengthen commissioning procedures or to learn from field data. This trend is stronger in nearly zero-energy buildings projects or programmes given the significant share of ventilation and infiltration losses on total building energy use.
The design of fans has evolved to meet the ever-increasing demands for higher efficiency machines, combined with the requirements for lower noise and high availability. In addition many fans are now being used in safety related applications, such as smoke control in buildings and underground spaces in the event of a fire. Variable speed is now more common, leading to some additional design problems and many existing users are revisiting their plant looking at ways to upgrade the fans.
The just published by JRC report on 'Harmonisation framework for health-based evaluation of indoor emissions from construction products in the European Union based on the Lowest Concentration of Interest approach (EU-LCI)' (ECA report 29) is now available here!
Submitted by Maria.Kapsalaki on Mon, 02/10/2014 - 11:32
Legislative drivers and new research on the importance of building and ductwork airtightness are leading to increased activity in this aspect of building energy performance. Qualification schemes for competent testers, training and events and where to find the best information are summarised here.
Submitted by Maria.Kapsalaki on Mon, 02/10/2014 - 10:55
Building and ductwork leakage are detrimental to energy conservation, comfort, and hygiene. They can cause building damage and it can prevent proper control of the ventilation airflow rates. Through the ASIEPI project, we have identified that while some key elements for a market transformation on envelope airtightness are under development in many countries, status quo seems to prevail for the duct market. With the objective of all new constructions being “nearly zero energy buildings” in 2020, policy makers need to know how better airtightness can be stimulated.
Submitted by Maria.Kapsalaki on Mon, 02/10/2014 - 09:00
A full size simulation laboratory aircraft cabin comprising three rows of seats has been built. This represents the Airbus A320 and the China C919 aircraft. Experimental research on the attenuation rule of the individual air-conditioning isothermal jet flow from nozzles positioned above the seats was conducted. The results show that axial air velocity continuously decreases with increasing cross-sectional distance. For a distance x < 0.4 m, (the axis air velocity sharp attenuation area), the velocity of attenuation slows.
Login