Energy²POG - Hybrid Energy Cluster Pogusch - Renewable energies and cost-efficient operation

Status

completed (November 2022)

Motivation and research question

Using the example of the "Steirereck - Pogusch" gastronomy and hotel project, a plus-energy ensemble was realised through energy and ecological optimisation measures of the existing building in combination with the planned new construction measures. The aim of the project was to design, optimise and demonstrate a hybrid energy supply system optimised in terms of operational material flows for the "Steirereck" restaurant and hotel in an exposed location on the mountain Pogusch. The idea underlying the project is the use of solar energy, biomass and passive components to create a plus-energy building ensemble at a location with high ecological sensitivity.

Status Quo / Initial Situation

Hotels and restaurants have an energy cost share in turnover of approx. 6%, hotels of approx. 4% (BMWFW, 2015). Energy consumption in the hotel and restaurant sector is a decisive production factor that causes high costs and CO₂ emissions. There is no doubt that residential buildings have the highest potential for implemnting sustainability goals, but it has been shown that special buildings, such as hotels and tourism facilities, on the one hand have high energy saving potentials and on the other hand can contribute significantly to the dissemination of plus-energy buildings and innovative technologies - especially the demo project „Steirereck Pogusch". Currently, there are still few innovative implementations in the field of energy and sustainability in hotels and tourism facilities.

The following deficits exist:

• Complex energy and resource flows.
• Individual components (energy, building materials, food, mobility, etc.) are usually considered in isolation, which means that synergy potentials are not utilised.
• There is hardly any consumption data available for all resource flows of catering buildings.

Project contents and objectives

Using the example of the "Steirereck - Pogusch" gastronomy and hotel project, a plus-energy ensemble was implemented by means of energy and ecological optimisation measures for the existing buildings in combination with new construction measures. It was shown that a comprehensive bundle of measures can be used to realise an almost energy-autonomous, resource-saving tourism projects in an "island location". The focus of the measures was on operating energy (heating, cooling, electricity), supplemented by measures to reduce resource consumption (diverse food production on site, recycling management - composting, ecological choice of building materials) and measures to reduce mobility-related energy and CO₂ consumption (electric mobility).

Methodological procedure

The development and planning of the research project was done through literature and internet research, on-site inventory analyses and in numerous workshops and planning meetings (online and face-to-face) with the project partners in order to define the targets for energy and CO₂ savings in the early planning stages. Energy simulations for the construction and operation of the area formed the basis for the implementation of the demo project. Scientific, quality-assurance support in the planning and construction phases, as well as monitoring of the ongoing operation, served to optimise and verify the targets.

Results and conclusions

It was shown that a comprehensive package of measures can be used to realise an almost energy-autonomous, resource-saving tourism project in an "island location". The focus of the measures was on operating energy (heating, cooling, electricity), supplemented by measures to reduce resource consumption (ecological choice of building materials, etc.) and measures to reduce mobility-related energy and CO₂ consumption (electric mobility). For the visitors and guests of the hotel project "Steirereck - Pogusch", the entire measures and consumption data were prepared and are presented to interested parties on site in the form of a presentation board. Due to the high national and international profile of the "Steirereck - Pogusch" hotel (guests include important representatives from politics, administration, business and society), the research project has a high dissemination potential (multiplier effects) shortly after completion.

Outlook

The examination of the implemented solution through monitoring and detailed evaluation clearly showed that the achievement of a nearly plus energy standard is possible. Further research and development work should deal with the economic efficiency of the building services components for plus-energy buildings in renovation and new construction. This is a prerequisite for a future large-scale implementation of the concept in the hotel and restaurant sector.

Project management

Steirereck-Stadtpark GmbH

Project or cooperation partners

• AEE – Institut für Nachhaltige Technologien (AEE INTEC)
• PPAG architects zt GmbH
• TBH Ingenieur GmbH

AEE INTEC
Feldgasse 19
A-8200 Gleisdorf
Tel.: +43 (03112) 5886 - 325
E-mail: k.hoefler@aee.at
Web: www.aee-intec.at