Foto: Fenster des Freihofs Sulz

IEA EBC Annex 73: Towards Net Zero Energy Resilient Public Communities

Clusters of public buildings like hospitals or university campuses often include critical infrastructure which relies on sufficient energy supply. The Annex aims at developing tools for the planning process of resilient, efficient and low carbon energy systems for such building clusters.

Short Description

Until recently, most planners of public communities (military garrisons, universities, etc.) addressed energy systems for new facilities on an individual facility basis without consideration of energy sources, renewables, storage, or future energy generation needs. Building retrofits of public buildings typically do not address energy needs beyond the minimum code requirements.

Energy demand reduction using energy performance contracting models typically address mechanical and lighting systems and their controls; and electrical energy savings from these projects range between 20% and 40% from the pre-renovation baseline.

Over the past two decades, the frequency and duration of regional power outages from weather, man-made events, and aging infrastructure have increased. Austria has not seen major disruptions, but due to climate change and growing overall requirements e.g. for safety, resilience is also to be addressed here. In alpine regions it has always been necessary to provide for resilient local supply of heat, cold and power. Major disruptions of electric and thermal energy can degrade critical mission capabilities and cause significant economic impacts at public building clusters. There is a need to develop a highly resilient "backbone" of energy systems to maintain critical mission capability and service operations effectively during such extended power outages over a range of emerging short-term and long-term scenarios.

Significant additional energy savings and increased energy security can be realized by considering holistic solutions for the heating, cooling and power needs of the buildings. The status quo in planning and execution of energyrelated projects will not support attainment of current energy goals (EPBD in Europe) or the minimization of costs for providing energy security. Experience gained from Annex 51 and various demonstration projects showed that additional research and cooperation is necessary to be able to offer planners a tool for integrated planning of building complexes and their energy supply systems.

This project will investigate and integrate innovative energy supply and energy distribution strategies (including information on their performance and costs), which will culminate in a complete community energy modelling tool concept. Finally, this project will enhance modelling tools to address resiliency of energy supply solutions, integrate a capability for computation of thermal and electrical network characteristics (capacity, losses, and cost).

Participants

Australia, Austria, Canada, Denmark, Germany, Italy, Latvia, Norway, Republic of Korea, UK, and the United States

Contact Address

Ingo Leusbrock
Feldgasse 19, 8200 Gleisdorf
E-Mail: i.leusbrock@aee.at

Heimo Staller
Feldgasse 19, 8200 Gleisdorf
E-Mail: h.staller@aee.at

Franz Mauthner
Feldgasse 19, 8200 Gleisdorf
E-Mail: f.mauthner@aee.at

Anna Maria Fulterer
Feldgasse 19, 8200 Gleisdorf
E-Mail: a.m.fulterer@aee.at

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