Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
Possibilities of Waste Heat Recovery from IT Equipment
David STANĚK, Michal KABRHEL
Czech Technical University in Prague, Czech Republic
With the world being more digital every day and a constant increase in IT equipment energy consumption, there is a growing potential in energy savings in the data center business. One of the options is decreasing electricity demand of electronic chips, the other is reusing waste heat generated by them. The study analyses the waste heat energy potential and summarizes various cooling technology systems with a detailed analysis of the optimal cooling technology. A theoretical case study of waste heat recovery from a virtual data center has been evaluated on a specific residential building. The data center has been designed based on knowledge gained on personal in-situ data gathering as well as on authors studying the given issue. Energy, environmental and financial impacts have been assessed for the given design. Reusing waste heat from IT equipment is today rarely used, but can save energy, emissions and operational costs as well as help with the world environmental aims.
4:15pm - 4:30pm
Lightwell In Residential Building: Architectural Solutions To The Daylighting Performance Through Parametric Simulation
João Pedro de Melo SOUZA1, Klaus Chaves ALBERTO1, Sabrina Andrade BARBOSA1,2
1Federal University of Juiz de Fora, Faculty of Architecture and Urbanism, Graduate Program of Built Environment, José Lourenço Kelmer Street, 36036-110 – Juiz de Fora, Brazil; 2State University of Rio de Janeiro, Department of Architecture and Urbanism, Ipiranga Avenue, 544, Centro, 25610-150 – Petrópolis, Brazil
The lightwell is an architectural solution to promote daylight into the internal spaces from the core of a building. The shaft configurations, such as geometry and reflectance can affect the performance of the daylighting entering the adjoining rooms under different conditions. This study aims to indicate the adequate architectural solutions to improve the daylighting performance of buildings with lightwells at three different southern latitudes. From a base model of 6-stories building, alternative cases were parametrically simulated using Rhinoceros, GrassHopper and ClimateStudio software. From variations in the lightwell geometry and walls reflectance, the cases were analyzed considering the lighting metrics UDI and sDA300. Results demonstrate that the daylighting is adequate on the floors near the top of the building and weakens towards the base of it. In Macapá, São Paulo and Chile, the sDA values reach 100% on the top floor, but only 3% on the first floor. It was also observed that materials with high diffuse reflectance on the shaft is more efficient in improving the daylighting performance than increasing its geometry. This research presents early-design guidance to inform architects and policymakers when considering the exploitation of daylight by the use of the lightwell.
4:30pm - 4:45pm
Development Of Scientific Requirements For Climate-neutral Buildings And Sustainable Funding Schemes In Germany
Sylvi ECKART, Juliane JÄGER, Nicolas KERZ, Andreas RIETZ
Federal Institute for Research on Building, Urban Affairs and Spatial Development, Germany
The German Climate Protection Plan 2050 describes interim targets and measures for the implementation of the Paris Climate Agreement, including the building sector. With the "New European Bauhaus", the EU Commission has currently initiated an ambitious process. While new construction has been in the foreground up to now, the existing building stock must make a significant contribution to achieving the climate protection goals in the future. Robust building technology and a high degree of adaptability lead to a longer useful life and are thus more sustainable, both economically and in terms of ecological balance. Resilience to the consequences of climate change is gaining in importance.
The main goal of this contribution is to inform about the latest developments in governmental policies and subsidy schemes. As part of the National Climate Protection Programme 2030, the new "Federal Funding for Efficient Buildings (BEG)" was introduced in 2021. Research projects investigated how, with the introduction of efficiency house classes, funding can take greater account of the life cycle approach and other aspects of sustainability. At the same time, general and special requirements for the ecological, socio-cultural and economic quality were developed as a supplement to the existing certification systems and introduced by the Federal Building Ministry as "Quality Seal for Sustainable Buildings" (QNG).