University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal

Logo BOKU Resarch Portal

Gewählte Master / Diploma Thesis:

Rafael Krenn (2023): Techno-ökonomische Analyse von Luft/Wasser-Wärmepumpe und Pelletkessel im Einfamilienhaus der 90er in Abhängigkeit vom Dämmzustand der Gebäudehülle.
Master / Diploma Thesis - Institut für Verfahrens- und Energietechnik (IVET), BOKU-Universität für Bodenkultur, pp 129. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
Climate change and Europe's dependence on energy imports require consistent action at European and national level. The building sector is one of the main sources of CO2-emissions while simultaneously showing the potential for swift energy savings and the establishment of climate friendly energy supply systems. Firstly, insulation measures achieve significant reductions in heat requirements in older buildings. Secondly, modern technologies like pellet boilers and heat pumps are inexpensive and effective alternatives to the common oil- and gas- fired boilers that are still widespread in Austria. In case of buildings from the 1990s, the first major renovations to the building envelope and a replacement of the heating technology are often due. In this work, the life cycle costs of a pellet boiler and an air/water heat pump were analyzed with different insulation conditions using the example of a single-family house built in 1994. The unrenovated, partially renovated and fully renovated condition of the building envelope was considered. For the heat pump, the calculations were done using three different seasonal performance factors. By combining the two heating technologies with the insulation conditions, twelve calculation scenarios were created, which were compared with each other and with the reference scenario of the existing building. The results show that the pellet boiler is the most cost-effective at all levels of insulation and is particularly preferable in the case of poorer insulation conditions. The air/water heat pump would require an electricity price of less than 20 cents/kWh to be more economical than the pellet boiler. Depending on the heating technology, both partial and full renovation will pay for themselves after 12 or 19 years respectively at the latest and can thus over a period of 50 years make a significant contribution to reducing energy costs.

Beurteilende*r: Pröll Tobias
1.Mitwirkender: Wolf Magdalena

© BOKU Wien Imprint