Selected factors that impact low-energy buildings (NZEB)
Krzysztof Pawłowski
krzypaw@utp.edu.plDepartment of General Building Engineering and Building Physics; Faculty of Civil and Environmental Engineering and Architecture; UTP University of Science and Technology in Bydgoszcz; (Poland)
https://orcid.org/0000-0002-6738-5764
Magdalena Nakielska
Department of Environmental Engineering; Faculty of Civil and Environmental Engineering and Architecture; UTP University of Science and Technology in Bydgoszcz; (Poland)
https://orcid.org/0000-0001-6349-6988
Abstract
The Directive 2010/31/EU introduces a new building standard (NZEB) in all member states of the European Union from 1.01.2021. In Poland, a low-energy building has been defined. The design, construction and use of such building is a complex process and requires knowledge of many aspects concerning building materials, general construction, building physics, installations, renewable energy systems and architectural design. Implementation of the current technical requirements in this area encompasses examining many parameters of an entire building but also of its external walls and joints. Defining them according to the applicable legal regulations and relevant standards evokes many questions and uncertainties regarding calculation procedures and interpretation of physical aspects. On the basis of conducted calculations and analyses, the authors have started a discussion on calculation methods in this field, proposing changes in legal regulations and calculation procedures.
The paper describes selected factors influencing low-energy buildings: physical parameters of building envelope elements, support of modern ventilation systems, energy performance parameters. The calculation part of the work concerns the analysis of physical parameters of the elements of low-energy building envelope and energy performance parameters of a buildings with consideration of energy saving and thermal insulation criteria. Formation of material systems of external walls and building joints requires taking into account innovative insulation materials and specific parameters of the air inside and outside of a building. The use of professional software for calculations and analyses provides reliable results.
Many coherent factors such as: architecture of a building, structural and material solutions of the external walls and their joints (elements of the building envelope), type and efficiency of the ventilation, central heating and hot water systems, use of renewable energy sources, integral management of the building in the field of energy production help to obtain optimal parameters of energy performance of the building and reduce emissions of CO2 to the atmosphere.
Keywords:
low-energy building, physical and energy parameters, legal requirementsReferences
The Regulation of the Council of Ministers of 22 June 2015 on the adoption of "The national plan for increasing the number of buildings with low energy consumption".
Google Scholar
The act of 7 July 1994. - The Building Law (Journal of Laws of 2013, item 1409, as later amended).
Google Scholar
Regulation of the Minister for Infrastructure and Construction amending the regulation on the technical conditions to be met by buildings and their location (Journal of Laws of 2017, item 2285).
Google Scholar
Regulation of the Ministry of Infrastructure and Development of on the methodology of energy performance calculations for whole buildings, separate apartments, or building parts constituting separate technical – functional areas, along with the scope of energy performance certificates. (Journal of Laws of 2015, item 376).
Google Scholar
PN- EN ISO 10211:2008 Thermal bridges in building construction. Heat fluxes and surface temperatures. Detailed calculations.
Google Scholar
Pogorzelski J.A., Awksientjuk J., Katalog mostków cieplnych. Warszawa: Wydawnictwo ITB 2003.
Google Scholar
PN-EN ISO 14683:2008 Thermal bridges in buildings. Linear thermal transfer coefficient. Simplified methods and approximate values.
Google Scholar
Dylla A., Fizyka cieplna budowli w praktyce. Obliczenia cieplno-wilgotnościowe. Warszawa: Wydawnictwo Naukowe PWN S.A. 2015.
Google Scholar
Pawłowski K., Projektowanie przegród zewnętrznych w świetle aktualnych warunków technicznych dotyczących budynków. Grupa Medium, Warszawa 2016.
Google Scholar
PN-EN ISO 13788:2003 ‒ Hygrothermal performance of building components and building elements.
Google Scholar
Internal surface temperature to avoid critical surface humidity and interstitial condensation. Calculation methods.
Google Scholar
TRISCO-KOBRU 86, PHYSIBEL c.V software, Belgium.
Google Scholar
PN-EN ISO 6946:2008 Building components and building elements. Thermal resistance and thermal transmittance. Calculation method.
Google Scholar
PN-83/B-03430/Az3:2000 Ventilation in dwelling and public utility buildings. Specification.
Google Scholar
Nakielska M., Pawłowski K., Increasing natural ventilation using solar chimney. E3S Web of Conferences, 14 (2267-1242) 2017, 1-8.
Google Scholar
Ministry of Infrastructure and Construction, Poradnik w zakresie poprawy charakterystyki energetycznej budynków. Ministry of Infrastructure and Construction. Warszawa, 2016.
Google Scholar
Życzyńska A., Cholewa T., “The modifications to the requirements on energy savings and thermal insulation of buildings in Poland in the years 1974-2021”. Budownictwo i Architektura, vol. 14(1) (2015), pp. 145-154. https://doi.org/10.35784/bud-arch.1680
Google Scholar
Authors
Krzysztof Pawłowskikrzypaw@utp.edu.pl
Department of General Building Engineering and Building Physics; Faculty of Civil and Environmental Engineering and Architecture; UTP University of Science and Technology in Bydgoszcz; Poland
https://orcid.org/0000-0002-6738-5764
Authors
Magdalena NakielskaDepartment of Environmental Engineering; Faculty of Civil and Environmental Engineering and Architecture; UTP University of Science and Technology in Bydgoszcz; Poland
https://orcid.org/0000-0001-6349-6988
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