PR2007

In the present study the relation between the wind speed and the air temperature during the summer period over the greater area of Athens is examined. Specifically, the hourly data of the air temperatures, recorded by 27 stations,were studied for the months of June, July, August and September during the period from 1996 until 1998, in relation to the corresponding mean hourly values of the wind speed which were measured by the National Observatory of Athens. As a result, a low increasing rate of air temperature in correlation to the wind speed exists during the day and night, time period.

The wind-induced natural ventilation of atrium buildingswith two roof openings has been investigated using computational fluid dynamics (CFD) techniques.

This study aims at examining the reduction of indoor air contaminants by plants placed in an indoor space.Field measurements were performed using Aglaonema brevispathum, which were verified as air-purifying plants by NASA.Two conditions for the amount of plant was used in two separate rooms whose dimensions are identical.

Field survey on indoor air quality was conducted during winter season, in an elementary school at Kagoshima city. Asthe windows had been closed because of avoidingthe cold outdoor airIn thewinter,CO2 concen- trationsunder pupilsstaying in the classroom wereover1500 ppmat the end of the lesson. When the windows of the corridor facing outside had been open, the CO2 concentrations in corridor were close to the outdoor CO2 concentrations. It was found that the ventilation during the break could play an important role in CO2 concentrations during the next lesson.

Temperature, relative humidity, pressure difference across the floor and microbial concentrations were investigatedin the four buildings which had either concrete floor (1 piece) or wooden floors (3 pieces) and crawlspaces.The temperature followed the outdoor temperaturein the crawlspaces having wooden floors. The relativehumidity in all the crawl spaces was continuously for a month at least 75 %. The moisture and temperatureconditions were favorable for microbial growth and several moisture indicating microbes were analyzed in crawlspaces and in indoor air.

The present paper describes the beginning of a sustainablerequalification program devised for some buildingsof the University of Brasilia, located in the city of Brasilia (latitude 15o south). The Requalification comprehends actions for implementing of old functions with reutilization of the existing building and landscape patrimony, a change in the patterns of consumption, an improvement in energy efficiency and a concern with the alternatives for optimum use of the spaces.

In order to overcome the increasing energy demand in buildings and related environmental problems, new efficientenergy technologies and new integrated building concepts, like solar passive and mixed-weighted thermalmass buildings, are being developed. The energy efficiency should not be the only parameter to consider in high-performance building design.

The paper describes the design and control methods for many aspects of energy consumption in a building,mainly lighting and heating / cooling, using the EIB / KONNEX technology. The basic objective is to present a modularly expandable and generally adaptabletechnology in order to progress from the stage of individually designed systems towards to wide range reliable integrated systems.

It has been investigated the effect of different construction parameters to the thermal performance of a solar chimney.These parameters are the thermal resistance of the walls, the glazing type and the solar chimneys thickness.The thermal performance of the solar chimney has been studied using up to date thermal dynamic simulation tools.

The objective of this research consists of studying the effectiveness of devices used in the microbiological purification of the air. This specifically involves the inactivationof biological aerosols in an air handling unit. The study of a first device working on the principle of photocatalysis has been carried out. This system, called NEO developed by the CIAT Company (patent WO 2004/081458), involves the combination of filtration on an adsorbent and heterogeneous photocatalysis.The air cleaning device in question is installed in a test box located in a wind tunnel called ONE-PASS.