Category: EuroSun2008-4

Contribution of Solar Thermal Systems to building energy. performance – comparison of Portuguese methodology with European

Standard EN 15316 (part 4-3) Maria Joao Carvalho ^ and Ana Neves 1 1 INETI, Department of Renewable Energies, Campus do Lumiar do INETI, 1649-038 Lisbon, Portugal* Corresponding Author, mioao. carvalho@ineti. pt Abstract In the frame of European Directive for Energy Performance in Buildings, EU Directive 2002/91/CE, Portugal produced legislation transposing the EU Directive and […]

Advantages of the collector and possible applications

The described semi-transparent collector is a multifunctional architectural design element. This offers a new market potential for solar thermal energy use. At a certain distance the structure of the small openings appears as a homogeneous semi-transparent area with the silhouette of the channels. This offers interesting possibilities in design: straight vertical or horizontal channel arrangements […]

Calculation assumptions

The reflectivity of walls, ground and ceiling are respectively 0.75, 0.45 and 0.75. The Lighting French Association recommands an illuminance level of 300 lux in a typical office [4] . In this study, the value of acceptable illuminance level has been set to 300 lux. To quantify the mean daylight autonomy in the room, the […]

Global Warming Impact

The results presented in the figure 3 support the idea that if we consider that all building design variables (orientation, materials, SOF, TOF, technology, etc) are maintained constant and only the location of buildings in the city are modify; the emissions related to the energy consumption vary significantly too. It is especially during winter’s month. […]

Fenestration-Shading, The Human Factor And Energy Efficient Buildings

Despina K. Serghides Architect/Department of Civil Engineering, School of Engineering & TechnologyCyprus University of TechnologyTel: 357-25002542, 25002724, Fax: 357-25002769, Email: D. K.Serghides@cytanet. com. cyAbstract In previous research on energy efficiency in buildings has found that it is possible to achieve comfort conditions, for the Mediterranean climate, without the need for mechanical energy for heating and […]

Global PV systems results

The energy production of both systems in 2006 is presented in Fig. 6, and for 2007 is presented in Fig. 7. For the year of 2006, the maximum daily average energy produced took place in August, 64.5 kWh, and the minimum occurred in November, 39.33 kWh. In 2007, the maximum was 65.7 kWh in October […]

The strategy

Solar availability is quite high in Portugal, even during the heating season. This makes the direct capture of solar radiation (windows), the indirect collection for domestic hot water and space heating (thermal solar system) and eventually energy production (photovoltaics) advised. Large windows are mainly oriented south, increasing the useful solar gain during winter. Smaller areas […]