@phdthesis{Nachbaur2018, type = {Master Thesis}, author = {Rene Nachbaur}, title = {Evaluation of tempering as a heat emission system in low-energy residential buildings}, doi = {10.25924/opus-2769}, pages = {xiii, 151}, year = {2018}, abstract = {In the residential construction industry, the focus on energy efficiency and cost effectiveness has been gaining importance. In order to achieve these contradicting objectives, a shift towards a reduced complexity in building practices can be observed. Within the HVAC sector, the Tempering method for space heating has received particular attention as an alternative way to heat museums and buildings worthy of preservation. In spite of the simplified design, this space heating system is claimed to offer significant advantages in its present field of application. This study evaluates the implementation of Tempering in the residential context. So far, there is no scientific research on the implementation of Tempering in energy efficient-dwellings. This master thesis provides initial results on achievable heat flux values, the impact on heat generation efficiency, the inherent installation costs as well as the particular consequences in terms of end energy consumption of the building as a whole. The findings are compared to the individual performances of well-established heat emission approaches. By means of a numerical analysis and a case study on a real-case single-family home, it is found that the heat flux values of Tempering systems suffice for the implementation within buildings, which comply with the low-energy building standard. Comparing radiant walls, radiant floors and radiators, the inherent installation costs are lowest for Tempering and radiant floors. The impact on the end energy consumption depends largely on the utilised heat generation system. With a gas-condensing boiler, Tempering performs equal to the radiant systems. When a ground source heat pump system is installed, however, Tempering performs poorly and accounts for a significantly increased energy consumption. Radiator systems are found to be the most energy-efficient method for space heating in both cases.}, language = {en} }