Posting Date | 9 July 2010
Countries where the tool has been developed | Denmark , Finland , France , Germany , Italy , Poland , United Kingdom , International Organizations
Country where the tool is in use | Denmark , Germany , Italy , Norway , Poland , United Kingdom , North America
Theme | Building envelope (walls, windows,...), Heating, domestic hot water, Air conditioning, cooling, ventilation, air infiltration, Lighting, Controls, energy management systems, Energy efficiency technologies and materials, Public and non residential buildings, Very low energy buildings, Training and education, Campaigning and awareness raising Price | 0
Validation/testing information | The tool has been validated with IEA Annex 36 based on other calculation tools. A report on this is available at http://www.annex36.com/eca/uk/06util/pdf/A36SubtaskC_Report_CalculationT...
Expertise required | Tool for decision makers. No detailed expertise needed, but general insight in buildings and energy performance. Parts of the tool such as case studies and retrofit measures as well as performance rating and problem related recommendations are thought to give inspiration into available energy saving mesures for the retrofit of educational buildings and need nearly no basic expertise. The use of the tool is self-explaining.
Number of users | 500
Input of the tool | Problem related recommendations for school buildings.
Performance rating of existing educational buildings: Selection of problem (out of a list).
International case studies on energy efficient retrofit of educational buildings: Selection of case study.
Retrofit measures for energy saving renovations of educational buildings: Selection of retrofit measure.
Simple to use energy assessment of a specific educational building in the actual state and with possible retrofit measures: Input of basic information like geometry (rough or detailed), building components (selection out of a list), HVAC components, lighting components (selection out of a list), selection of possible retrofit measures (selection of a list), use of default cost data or overwriting with own data.
Output of the tool | Problem related recommendations for school buildings.
Performance rating of existing educational buildings.
International case studies on energy efficient retrofit of educational buildings.
Retrofit measures for energy saving renovations of educational buildings.
Simple to use energy assessment of a specific educational building in the actual state and with possible retrofit measures. Development of an energy saving retrofit concept.
Strengths | easy to use, interesting case studies, comparison with national energy performance data of educational buildings, simple assessment tool for developing energy-efficient retrofit concepts, inspiring about case studies and retrofit measures as well as how to solve specific problems in existing educational buildings.
Weaknesses | Uses EN 832 as energy use calculation in combination with effort figures for different HVAC systems and a simplified lighting calculation method. Not adapted to current CEN standards. However this keeps the tool simple to use.
Can't be used for an energy performance certification.
Author(s) information |
Name:
Hans Erhorn, Simon Wössner, Heike Erhorn-Kluttig (Fraunhofer Institut für Bauphysik)
Publisher | Fraunhofer Institute for Building Physics
Funding description | The ECA computer program has been developed as a decision support tool for educational buildings. It was prepared under IEA ECBCS programme Annex 36 - 'Retrofitting of Educational Buildings' under the leadership of the Operating Agent Hans Erhorn from the Fraunhofer Institute of Building Physics (IBP), Stuttgart.
Participants were:
Denmark: Cenergia Energy Consultants, DBUR Danish Building and Urban Research
Finnland: VTT Building and Transport
France: ENTPE DGCB - LASH
Germany: Fraunhofer Institute of Building Physics (IBP), University of Stuttgart IKE, Bremen University of Applied Sciences Dept. of Architecture
Greece: National Technical University of Athens
Italy: ENEA ENE-SIST
Norway: Norwegian Building Research Institute
Poland: Poznan University of Technology Institute of Environmental Engineering
UK: Schools Building & Design Unit Dept. for Education & Employment
USA: U.S. Department of Energy
The work was funded by the national energy programmes. None of the participation organisations, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, expressed or implied, or assume any legal liability or responsibility for the accuracy, completeness or usefulness of any results or of any information disclosed, or represents that its use would not infringe privately owned rights. The program was prepared with the assistance and participation of representatives from many organizations based on consensus and available information.
This is the first and international version of the ECA. The national experts of the participating countries surveyed the careful development. Still the software could contain bugs. Users should carefully review the results to make sure that they are credible and consistent. If bugs or inconsistencies should occur, please inform your national representative (see information within the ECA).
The ECA is copyrighted under the property of the Operating Agent for the benefit of the participants. It may be reproduced and distributed in the participating countries of the Annex 36 project.
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