Article: Applying dynamic energy and exergy analysis to a building envelope Journal: International Journal of Exergy (IJEX) 2024 Vol.43 No.2 pp.93 - 109 Abstract: The aim of this study is to apply dynamic exergy and energy analysis to the building envelope. The peculiarity of the analysis is that it considers the dynamic energy and exergy model of the room of the apartment with a one-second time step, taking into account the accumulation of energy and exergy in external and internal enclosures, as well as heat fluxes between them and solar radiation also. It is shown how the structure of the exergy balances of the room changes if the reference point is the temperature in the room, ambient temperature, and 0°C. The proposed analysis approach is to use different reference points for different applications of exergy analysis, where the oscillations of exergy will be smaller. The study demonstrates that the accumulation of exergy by internal partitions accounts for 2% depending on the exergy reference point. Inderscience Publishers - linking academia, business and industry through research

Title: Applying dynamic energy and exergy analysis to a building envelope

Authors: Nadia Buyak; Valeriy Deshko; Inna Bilous; Dmytro Biriukov; Volodymyr Voloshchuk

Addresses: National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute', Kyiv, Ukraine ' National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute', Kyiv, Ukraine; Institute of Engineering Thermophysics of National Academy of Sciences of Ukraine, 2a Mariii Kapnist Str., c. Kyiv, 03057, Ukraine ' National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute', Kyiv, Ukraine ' National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute', Kyiv, Ukraine ' National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute', Kyiv, Ukraine

Abstract: The aim of this study is to apply dynamic exergy and energy analysis to the building envelope. The peculiarity of the analysis is that it considers the dynamic energy and exergy model of the room of the apartment with a one-second time step, taking into account the accumulation of energy and exergy in external and internal enclosures, as well as heat fluxes between them and solar radiation also. It is shown how the structure of the exergy balances of the room changes if the reference point is the temperature in the room, ambient temperature, and 0°C. The proposed analysis approach is to use different reference points for different applications of exergy analysis, where the oscillations of exergy will be smaller. The study demonstrates that the accumulation of exergy by internal partitions accounts for 2% depending on the exergy reference point.

Keywords: exergy; exergy destruction; building dynamic simulation; reference temperature; exergetic efficiency.

DOI: 10.1504/IJEX.2024.136928

International Journal of Exergy, 2024 Vol.43 No.2, pp.93 - 109

Received: 31 Mar 2023
Accepted: 08 Oct 2023
Published online: 29 Feb 2024 *

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Title: Applying dynamic energy and exergy analysis to a building envelope

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