IEA ECBCS Annex 49 - Low Exergy Systems for High Performance Buildings and Communities

• Forschungsstelle: BFE
• Projektnummer: 102532

Publikationen / Ergebnisse (Englisch)

This is the final year of the IEA ECBCS Annex 49 collaboration. The Swiss deliverables are all complete pending any requested revisions for the final acceptance into the Annex 49 Guidebook. The guidebook will be the final deliverable of the Annex. There will also be a final conference organized by the Annex. It will take place in Fall 2010. This year consisted of the last two working phase meetings of the Annex. One meeting had an concurrent conference in which several Swiss projects were presented. The status of the wastewater heat recovery, the retrofit cooling decision tree, and the SEPE analysis tool were all presented at the first working phase meeting, and they were incorporated into the guidebook at the second and final meeting. Along with these promised deliverables from the Swiss participation, several other exergy-related projects from Switzerland have been incorporated into the final dissemination. As a part of the Annex much international collaboration has continued in the sharing of research and technological advances being made in the various member countries. Along with the mentioned conference, Forrest Meggers gave a series of guest lectures in Chile on exergy and buildings, and he also presented a paper on low exergy technologies at the International Advanced Technology Conference in Malaysia. In Switzerland, Forrest Meggers also presented two papers at the CISBAT conference in Lausanne: one on a new low exergy wall system, and the other covering the expanded analysis of the wastewater heat recovery. Also in Switzerland, the collaboration with Geberit was cancelled due to limited internal financial resources at the company, which was unfortunate due to the accepted KTI grant that was cancelled along with it. But a new collaboration is being initiated between two groups at the ETH and the HSLU in Luzern to develop a new low-temperature-lift heat pump. The Annex 49 will be finished in 2010 and the Guidebook will be compiled. A final conference focused on exergy analysis and building and community systems will be held at the end of 2010 in Munich. Presentations of project results have already been accepted for 2010 at conferences in Stuttgart, Turkey, and at a variety of conferences and meetings in Switzerland.

Auftragnehmer/Contractant/Contraente/Contractor:
ETH - Zürich

Autorschaft/Auteurs/Autori/Authors:
Meggers,Forrest
Benz-Karlström,Petra

Zugehörige Dokumente

• IEA ECBCS Annex 49, Low Exergy Systems for High Performance Buildings and Communities - Jahresbericht 2008 [PDF] 1'488 kB
• IEA ECBCS Annex 49 | Low Exergy Systems for High Performance Buildings and Communities - Jahresbericht 2009 [PDF] 144 kB

Schlussbericht (Deutsch)

Es ist zwingend notwendig, dass die globalen Treibhausgasemissionen reduziert werden, um einen signifikanten Klimawandel zu vermeiden. Die Bauwirtschaft ist eine der größten Quellen von Emissionen. Das International Energy Agency (IEA) lieferte mit dem Annex 49 “Low Exergy Systems for High Performance Buildings and Communities”, das Teil des Programms Energy Conservation in Buildings and Community Systems (ECBCS) ist, den Rahmen für eine internationale Zusammenarbeit. Ziel der Zusammenarbeit, an der 12 Länder beteiligt waren, war es zu untersuchen, wie der Gebäudebestand mit Hilfe des Exergie-Konzepts verbessert werden könnte, um dessen Leistung zu verbessern und gleichzeitg die Emissionen zu minimieren. Die Schweiz beteiligte sich mit zwei Projekten: zum Einen mit der Anwendung eines neuen Exergie-Analyse-Tools, zum Anderen mit der Untersuchung des exergetischen Potentials der Wärmerückgewinnung aus Abwasser. Das Tool für die Exergieanalyse, SEPE, wurde an der KTH - The Royal Institute of Technology, Stockholm entwickelt und von der Basler & Hofmann AG getestet und bewertet. Das Tool basiert auf Excel und verwendet für den Aufbau eines Systems das copy-paste Prinzip. Die in Excel eingebaute Iterationsfunktion wird genutzt, um Steady-State-Berechnungen auszuführen. Das Tool wird anhand von Beispielrechnungen dreier Kühlsysteme präsentiert. Das zweite Projekt wurde von der ETH Zürich, Professur für Gebäudetechnik, durchgeführt. Eine Reihe von Modellen für die dezentrale Wärmerückgewinnung aus Abwasser wurden entwickelt, die die Leistung eines integrierten LowExergie-Systems, welches Wärme aus Abwasser mit Hilfe einer Wärmepumpe mit hohem COP und niedrigem Temperaturhub nutzt, bewertet. Neben diesen Projekten lieferte die Schweiz weitere kleinere Ergebnisse, wie potenzielle Methoden und Technologien für LowExergie-Gebäudetechnik. Die Ergebnisse des Annex 49 sind in Form eines IT-gestützten Handbuchs, das auch Zugang zu den Tools bietet, verfügbar. Es ist erhältlich unter: http://www.annex49.com.

Auftragnehmer/Contractant/Contraente/Contractor:
Basler & Hofmann AG
ETH Zurich, Institute für Technologie in der Architektur, Professur für Gebäudetechnik

Autorschaft/Auteurs/Autori/Authors:
Meggers,Forrest
Benz-Karlström,Petra

Schlussbericht (Englisch)

It is imperative that global greenhouse gas emissions are reduced to avoid significant climate change, and the building sector is one of the largest single sources of emissions. The International Energy Agency (IEA) Energy Conservation in Buildings and Community Systems (ECBCS) Programme Annex 49, “Low Exergy Systems for High Performance Buildings and Communities,” provided the framework for an international collaboration to study ways to improve the built environment using the concept of exergy to maximize performance and minimize emissions. There were 12 countries participating. Switzerland contributed two primary projects: one implementing a new exergy analysis tool, and the other evaluating the exergetic potential of wastewater heat recovery. The tool for exergy analysis, SEPE, was developed at KTH – The Royal Insitute of Technology, Stockholm, and tested and evaluated by Basler & Hofmann AG in Zurich. The tool is straightforward, Excel-based using the inbuilt iteration function for steady state calculations. It is presented with example analyses of three cooling systems. The second project was undertaken by the ETH Zurich Building Systems group. A series of models for decentralized heat recovery from wastewater are presented that evaluate the performance of an integrated low exergy system that exploits wastewater heat using a low temperature-lift, high COP heat pump. Along with the primary projects, the Swiss participation also provided several small contributions, which include tools and technologies for low exergy building systems. The outcome of the Annex 49 is in the form of an IT based guidebook including access to the tools developed. It is available at: http://www.annex49.com.

Auftragnehmer/Contractant/Contraente/Contractor:
Basler & Hofmann AG
ETH Zurich, Institute für Technologie in der Architektur, Professur für Gebäudetechnik

Autorschaft/Auteurs/Autori/Authors:
Meggers,Forrest
Benz-Karlström,Petra

Zugehörige Dokumente

• Low exergy building systems analysis: Integrated wastewater heat recovery and analysis of cooling systems with SEPE - Swiss contributions to IEA ECBCS Annex 49 - Schlussbericht 2010 [PDF] 3'142 kB