This paper discusses the status of standards and regulations concerning performance calculationmethods for renewable energies systems in the built environment. The outcome of a European wideinquiry on this topic, carried out in the frame of the European project on Energy Performance Regulations (EnPeR) will be presented. In addition an overview is given of the renewable energiessystems that are considered under these regulations and the consequences of the new EnergyPerformance Directive.
A modified k-e model that restricts turbulent time scale using Durbin’s limiter was applied for numerical prediction of wind pressure distributions of building models. It is known that the standard k-e model tends to overestimate wind pressure of windward
The paper describes the development of unsteady pulse pressurisation techniques for measuring the leakage of buildings. The original version of the technique (the UP technique) has been investigated experimentally and theoretically in a single cell test space. The initial results are very promising, with a good degree of repeatability and similar sensitivity to changes in leakage levels as the conventional steady (DC) technique. An interesting outcome of these early tests was the observation that quasi-steady flow could be established in a short time.
This paper discusses how ventilation and air distribution can have a positive or negative impact on chemical, biological and radiological agents entering buildings, on their movement within the buildings and on their removal. It also points out the key role played by the envelope airtightness of the building and its pressurization as a security tool.
This paper is a sum-up of the work performed by CSTB, ADEME and the Ministry of Equipement in France to improve the energy performance of the huge ministry stock of buildings (10 000 buildings of different size and uses). The objective of the project was to evaluate the performance of the buildings and to improve it in close work with the end-users.
In Germany, the radon concentration of 200 Bq/m3 in accordance with the European recommendation (Kommission der Europäischen Gemeinschaften, 1990) is valid as design level for new buildings. Radon from building material can make a significant contribution
A framework for performance criteria for healthy and energy-efficient buildings was developed within the context of two European funded Projects: PeBBu and HOPE.PeBBu, Performance-Based Building, is a Thematic network under the Competitive and Sustainable Growth programme, which started 1 September 2001 and will run for 4 years.
The aim of this study is to help dimension the Sol Depressurization System against radon inexisting buildings.First, various remediation techniques implemented on existing buildings are comparedregarding the reduction of indoor radon concentration. The results show that techniques thatdeal with basements have generally the best efficiency and in particular the SoilDepressurization Systems.In situ test equipment has been developed in order to dimension these systems. It has beenused on different basements such as crawl spaces and cellar.
Considering the natural ventilation, the thermal behavior of buildings can be described by a linear time varying model. In this paper, we describe an implementation of model reduction of linear time varying systems. We show the consequences of the model reduction on computing time and accuracy. Finally, we compare experimental measures and simulation results using the initial model or the reduced model.
A comfortable indoor climate environment is necessary for modern buildings and therefore the Heating, Ventilation and Air-Conditioning (HVAC) systems are widely used. Faults or disturbances are normally unavoidable in the systems and they will lead to more energy consumption or degradation of comfort level of indoor climate. Energy consumption is useful to detect the
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