PR2007

Wind speed characteristics in the centre of a city differthan the ones in its suburban. Street canyon effects result in weak airflows in the centre of highly dense citiesbecause of the combination of inertia and gravitationalforces. A huge experimental campaign took place in the centre of Athens in order to create a database of the main parameters that affect wind speed characteristics.Previous studies aimed to calculate wind speed in urban canyons by using deterministic techniques.

In summer 2007 a housing project will be build, reachablewithin 20 minutes by car from Granada. It contains33 single family houses , 21 apartements and 40 dwelling units social housing. The goal of this project is to achieve moderate temperatures withoutelectric equipement during most of the time. Energyuse achieves so called Passivhouse Standard.For this project we have to adapt cooled soil in weight and thickness. Hygrothermal simulations showed the possibility to evaporate under the roof insulation 200 g Water per day and sqm in this climate.

The use of windows is a key adaptive opportunity in naturally ventilated buildings especially in summer when the building is likely to be free-running. In these circumstances the use of windows can be on important key to occupants remainingcomfortable, particularly in warm weather. This aspect of buildings is poorly covered in existing thermal simulations in which occupant behaviour is ignored or presented in a very basic fashion. This paper presents an approach to the simulationof window opening behaviour which has been developed from observations of occupant behaviour in UK offices.

The primary aim of the EP label project was to develop a methodology for energy benchmarking and certification of buildings, based on Operational Ratings, to address the EPBD Article 7.3 requirement for Public Buildings over 1,000 m to display an Energy Performance Certificate.Within the EP label project, an easy-to-use yet robust system for building owners, occupiers and managers has been developed that produces a provisional energy performancecertificate in advance of national legislative requirements being finalised in each Member State.Energy assessment and certification have been appro

Regular air tightness and infiltration measurements were performed in forty houses, in the area of Attica, Greece. Two measurement methods were used, the tracer gas decay method and the Blower Door tests method. BlowerDoor measurements were done in accordance with EN ISO 13829 [1]. Ambient conditions and temperature fluctuations inside the houses were measured as well.A classification of houses examined, based on experimentsresults was acted out in accordance with EN ISO 13790 [2].

This study examines air quality measured in two classroomsin a UK school, which uses two different forms of natural ventilation, over an eight month period. The first classroom is an internal room that contains a top-down natural ventilation system known as a Windcatcher.The room also has a separate mechanical extract fan. The second classroom is ventilated using windows and doors that open to the outside. This study focuses on measuring the performance of a Windcatcher and reviews its potential to replace ventilation provided by conventional windows.

Adverse health effects have been reported in indoor swimming pools. Contributing factors may include high air humidity encouraging microbial growth, ventilation,aerosols and volatile organic compounds, as well as microbiological and physico-chemical quality of water. These factors were analyzed in five indoor swimming pools, of which four were to be renovated in the near future and one was only two years old. In addition, technical investigation of building structures, ventilation system, and physical conditions indoors was conducted.

The purpose of ventilation is to dilute indoor contaminantsthat an occupant is exposed to. In a multi-zone environment such as a house, there will be different dilutionrates and different source strengths in every zone. Most US homes have central HVAC systems, which tend to mix conditions between zones.

The management of indoor air quality is accomplished by various types of complex mechanisms related to indoorenvironment and recently, an integrated solution applying state of art technology is being presented pertainingto the management of indoor air quality.Currently in Korea, an intelligent type certification programis developed and enforced.

This paper shows the analysis of ventilation impact in the energy behaviour in rural areas. Considering that a large percentage of housing production is self-built in this part of Mexico, the impact of this construction activityis very important. This concerns the thermal comfort of the occupants of this type of constructions, which has also effects in the microclimate of the region.Due to the specifically local economy and the social structures, the self-built contributes in 60 % of the wholeof production of housings.