Dusan Petras

17-Oct-2018, 2:30PM-3:00PM

Session: Global Energy Policy & Programs

Track N | Energy Management Around the Globe

Energy Evaluation of Representative Residential Buildings

Dusan Petras
University Professor
Slovak University of Technology in Bratislava


The methodology used in this study was oriented to the detailed description of the energy saving renovation alternatives that will be the most probably used in the majority of the buildings renovated in Slovakia. The accuracy of the energy modeling in the building stock was intentionally compromised, so that a very limited number of the reference buildings were used considered enough for the estimation of the technical energy saving potential. The chosen buildings are typical representatives of different groups of existing building stock in Slovakia. They represent 87% of the existing building stock based on the total floor area. Methodology The calculation methods for the assessment of the annual energy use for the space heating are specified in STN EN ISO 13790. The seasonal method is used in Slovakia for the calculation of the energy demand of the residential buildings. The data on the real energy consumption of the studied buildings were provided by the appropriate housing associations. The obtained values represent the overall average energy consumption calculated from the monthly monitored energy consumptions for the heating for each building from September to April next year - heating season. Results The results show that the renovation of the buildings can bring significant savings, more than 40% compared to the buildings in original condition. According to the Directive 2010/31/EU and the Slovak Regulation 364/2012 Z.z. there is a national obligation to implement various energy conservation measures in all energy end-use sectors, including the residential buildings, in order to achieve at least A1 class for the total energy demand valid from 2016. The results of the analysis showed that none of the representative buildings in original condition fulfilled the criteria of the national standards and the building code. The building with the energy consumption closest to the required value was renovated Building no.II (year of construction 1983) with energy category for space heating B.


Professor Dušan Petráš from Slovak University of Technology in Bratislava-Slovakia, is the former vice-rector of STU and dean of the Faculty of Civil Engineering. Also he is the president of Slovakian HVAC-Association SSTP (Slovak Society of Environmental Technology) and the past-president REHVA (Representative European Heating, Ventilation Association). Int the present he is the professor at the Department of Building services and dealing with the HVAC-systems in buildings. His scientific work is focused on the energy conservation by performance of the buildings with respect to the providing the helth and comfortable indoor environment. He is author and co-oauthor of 15 books (Energy auditing of Buildings, Renewable Energy Sources for Low- temperature systems, Low-temperature heating and High temperature cooling...), 50 scientific papers in foreign journals/on international conferences as well as about 100 lectures in 25 countries in 3 world languages. Professor Petráš is also member of ASHRAE, Academy of ISIAQ, REHVA Fellow, he was also the Guest Professor in DTU Lyngby (Denmark) and Guest Lecturer in FH Pinkafeld (Austria).


Track: N Energy Management Around the Globe | Session: Global Energy Policy & Programs