PR2007

The present paper deals with the experimental analysis and monitoring of the energy and environmental performanceof a green roof system installed in two residences,in the region of Athens, Greece. The one is located in municipality of Psichico and the other in municipality of Peristeri. The analysis was carried out in two phases.During the first phase, monitoring of the green roof systemwas performed.

Measurements of indoor pollutants have been performed in 50 residences in Athens. The concentration of CO2, CO, TVOC’s and PM2.5, PM10 has been measured. The ventilation rate in the dwellings has been calculated using continuous measurements of the CO2 co

Automated living and working environment is becominga commonly used service. The present paper deals with a dynamically automated control of shading in buildings during mid-seasons. In addition to shading the controller also regulates illuminance levels, internaltemperatures and their harmonization. The system is designed as fuzzy controller that functions in real time and under real environmental conditions. For this purposea test chamber with an opening on the southern side was built. Changeable geometry of the opening was realized with the automated external roller blind.

One of the research areas of the Energy research Centreof the Netherlands (ECN) concerns the built environment.Several facilities to conduct research activitiesare at ECNs disposal. One of these facilities, are five research dwellings located on the premises of ECN. Measured data from these facilities together with weather data and computer models are used to evaluate innovative energy concepts and components in energy systems.

The integration of research outputs on the cross ventilation is tried in order to quantify the reduction of cooling energy, by raising the stepwise questions and by reviewingexisting knowledge useful to find solutions. Through the integration, it will be possible to estimate the sensitivity of errors of discharge coefficients and wind pressure coefficients on the cooling energy and to determine the necessary accuracy.

The growing energy consumption for cooling of buildingsis one important concern in Mediterranean countries.Natural ventilation plays an important role as passive energy saving strategy, regarding cooling of buildings in this climate. Solar chimneys are some of the most useful systems that make use of this strategy. But optimised implementation and quantification of the improvements achieved by these systems are required and must be assisted by a comprehensive thermal characterisationof them. However the performance of solarchimneys depends on combined and very complex physical phenomena.

In Part 1, the changes in wind pressure coefficient distributionon the surfaces of the buildings when building coverage is varied are evaluated and identified, and it is elucidated that the ventilation through skylight is effectivebecause the surfacepressure can bekept negativeon roof surfaces even when building coverage is high.In Part 2, the results of numerical simulation (CFD) are compared with the experimental results.

Building industry is often regarded as a mature and traditionalsector, in which the technological development is not so accelerated as in other cases.The increasing costs for electric energy, heating and climatization,the dramatic environmental issues draw the attention of professionals and experts to those technologicalsolutions, components and devices which are going to represent the immediate future of engineering practices.The attention was drawn to a 16 900 m3 sport facility building with 800 seats to be built in the East sector of Rome, one of the districts in which is higher the need

The scope of the present paper is the presentation of a dynamic and interactive vocational training tool for the implementation of the Directive 2002/91/EC.Certain features of the tool that depend on the existing legislation and restrictions in each country and certain characteristics of the trainees (e.g. profession, scientific background) that influence in a great or in a small extent the training procedure in each case are analyzed.

Numerical and experimental results concerning the emission of a tracer gas (N2O) inside a naturally ventilatedgreenhouse are presented and analyzed. Air sampleswere continuously taken at six points in the greenhouseand in two positions outside the greenhouse using two infrared gas analysers with multiple inlets. The calculationsby the numerical model were done for several wind directions and wind speeds. In each set values for the experiments were used for air speed and direction.