Latest SCI publications
Demonstration of minimally invasive thermal and energy retrofits of classic 1950s - 60s apartment buildings
Research project (§ 26 & § 27)
Duration : 2021-07-01 - 2024-06-30
Urban settlement areas face the unconditional challenge of converting their built infrastructures to completely climate-neutral energy applications within a maximum of two decades. The complete phase-out of fossil fuels for space heating was only recently fixed for 2040. In the heat supply sector, the numerous households heated with gas - about 400,000 in Vienna alone - pose a particular challenge. Since a changeover to green gas is not an option under the given energy and economic framework conditions, there is a need to switch to alternative systems of heat supply, for which district heating or heat pump applications are particularly suitable in Vienna. In the course of the research project, solutions for the efficient use of district heating and heat pump applications are investigated with the help of a facade-integrated heating system. The façade heating optimally tempers the building and minimizes heat losses to the outside. Existing buildings can be thermally activated in a sustainable way with this concept, without users and occupants being affected by structural measures. Domestic hot water is provided centrally or decentrally by heat pumps, which also use the external wall heating as a heat source. This results in two positive effects: First, it can ensure efficient hot water preparation all year round. Secondly, the use of heat from the façade can contribute to summer heat dissipation, as the issue of cooling will become more of a focus in refurbished residential properties in the coming years. The concepts will be tested and implemented in three demonstration buildings.
Heat generation from infrastructure projects and integration in decentralized low-temperature heating and cooling networks for plus-energy districts
Research project (§ 26 & § 27)
Duration : 2021-02-01 - 2022-01-31
The use of geothermal energy from civil engineering structures and tunnels ("tunnel geothermics") offers the possibility of using it for environmentally friendly heating and cooling in local areas (Adam et al., 2005). Due to its proximity to the city of Innsbruck, the Brenner Base Tunnel offers the optimal conditions to determine the effectiveness and application limits of tunnel thermal energy, to simulate its distribution in the city and thus to explore its technical and economic feasibility. In view of demographic change and the increasing demand for energy and heat, forwardlooking heat supply technologies such as geothermal energy are key functions. Especially in alpine areas, large railway tunnels structures are currently being built. Due to the large superpositions of these tunnels and the resulting prevailing temperatures, it is possible to extract the energy provided by the mountains at a temperature level above 20°C, which is higher than that of conventional geothermal plants, and to use it for heat supply. Depending on superposition and the associated temperature, it is often necessary to cool the tunnel drainage water with special equipment before it can be discharged into the corresponding receiving watercourses (Moormann et al. 2016). As this seems grotesque in times of climate change and the ever increasing demand for heat, this heat should be used and distributed in a sensible way. Since these large-scale infrastructure projects serve to improve the traffic and transit situation in the country, it is important to find opportunities and synergies between traffic engineering, tunnel construction and geothermal use. Up to now there are only potential assessments of geothermal use in shallow tunnels and on a small scale, therefore the Brenner Base Tunnel serves as a great opportunity to analyze and evaluate the longest railway tunnel in the world, which represents a major innovation in the field of climate-friendly energy supply. In order to enable an integrative system analysis, the integration of the heat into a possible plus-energy quarter of the city of Innsbruck is also being investigated. This is strongly dependent on the prevailing network and consumer structure as well as the distance between the consumers and the tunnel portal. In order to determine the highest possible efficiency of distribution, a wide variety of scenarios, based on the latest technologies and the existing energy infrastructure, must be calculated and evaluated. The overall objective of this exploration can therefore be defined as the integrative consideration of the geothermal potential of the Brenner Base Tunnel and the subsequent distribution of the heat produced from it to the end consumer. The aim is to evaluate how much heat (energy) is contained in such infrastructure and whether it is worth extracting and distributing it. By using this energy, provided by these already built buildings, its value increases many times over and thus contributes to a futureoriented, climate-friendly and CO2-free energy policy.
Research project (§ 26 & § 27)
Duration : 2020-02-14 - 2020-09-15
At present, wind power operators are faced with the challenge of operating older wind power plants economically without green electricity subsidies. The reason for this is the volatile wind power production, which is constantly increasing with the increasing spread of wind power generation. The more plants produce electricity at the same time, the lower the revenue of the older wind power plants, as they have to participate in the electricity market as normal participants. Technologically, storage and sector coupling is currently seen as a promising measure to counteract volatile wind power production. Especially the stationary battery storage and hydrogen production for mobility applications are said to have a high potential. The aim of the project is to calculate the possibilities for battery storage and hydrogen production (power to gas) for a past year on the basis of available real data. In the case of stationary battery storage, the possible integration on the spot market as well as the decentralized supply for mobility applications will be considered. In the field of hydrogen production, possible production volumes will be determined on the basis of the electrolysis technologies currently used, and decentralised supply for supply for mobility applications FC car/FC truck will be discussed. Economic estimates can be made for the present case on the basis of data from the megaWatt Logistics project (lead project, Mobility of the Future, FFG No.: 867706). The project will provide Windkraft Simonsfeld AG with an indication of which of the proposed measures are technically feasible and an economic estimate of the costs of a storage coupling. These values will then serve as a strategic decision as to which technology expansions are possible for the existing wind turbines.