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001-es BibID:	BIBFORM113735
035-os BibID:	(WoS)001056770900001 (Scopus)85169143581
Első szerző:	Bodó Béla (gépészmérnök, épületgépész)
Cím:	A Facility's Energy Demand Analysis for Different Building Functions / Béla Bodó, Emese Béni, Gábor L. Szabó
Dátum:	2023
ISSN:	2075-5309
Megjegyzések:	A more accurate determination of energy demands for the buildings is of utmost importance for estimating future energy demands. This article presents two novel ideas that have the potential to contribute to a more precise determination of expected energy demands. The first idea involves accounted the building's function more thoroughly, which enables the determination of different energy demands for two or more identical buildings, depending on their respective usage func-tions. According to a case study, the heating energy demand can be up to twice as high in a commercial facility compared to a residential building. Similarly, the cooling energy requirement can also differ. The second idea concerns determining the heating degree days (HDD) and cooling degree days (CDD) values from the daily minimum and maximum temperatures. This idea may be relevant when few instantaneous values are available for the daily mean temperature. Ac-cording to the case study, the calculating values from the daily minimum and maximum temper-atures follow the HDD and CDD values specified from the daily mean temperature. However, the difference is less than 2% for the heating season but higher for the cooling season. Therefore, further research is required to refine the constants in the cooling equation.
Tárgyszavak:	Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk balance-point temperature degree day energy demand
Megjelenés:	Buildings. - 13 : 8 (2023), p. 1-18. -
További szerzők:	Béni Emese L. Szabó Gábor (1987-) (épületgépész)
Pályázati támogatás:	TKP2021-NKTA Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM129854
Első szerző:	Kalmár Ferenc (gépészmérnök)
Cím:	Comparison of Energy Demand for Heating and CO2 Emissions in Urban and Rural Areas, the Case of Hajdú-Bihar County, Hungary / Kalmár Ferenc, Bodó Béla, Kalmár Tünde
Dátum:	2025
ISSN:	2075-5309
Megjegyzések:	Mitigating carbon dioxide emissions in the building sector is a primary global goal. This paper compares different residential buildings in urban and rural regions of Hajdú-Bihar County (Hungary). Significant differences were found between urban and rural single-family houses concerning their energy performance; however, the differences in CO2 emissions were not significant. Only the differences in specific heat losses were significant between urban single-family and masonry-structured multifamily buildings. Panel buildings demonstrate the best energy performance from their construction period, but due to high investment costs and the inability to change the heat source, the CO2 emissions from these buildings have a lower limit today. In both single-family houses and masonry-structured multifamily buildings, meeting the heat demand can be achieved with zero CO2 emissions using existing technologies.
Tárgyszavak:	Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk urban residential buildings rural residential buildings multifamily buildings heat losses heat demand CO2 emissions
Megjelenés:	Buildings. - 15 : 10 (2025), p. 1-24. -
További szerzők:	Bodó Béla (1980-) (gépészmérnök, épületgépész) Kalmár Tünde (1978-) (gépészmérnök)
Pályázati támogatás:	TKP2021-NKTA-34 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM122088
035-os BibID:	(WoS)001254596800001 (Scopus)85197876508
Első szerző:	Kalmár Ferenc (gépészmérnök)
Cím:	Decarbonization Potential of Energy Used in Detached Houses-Case Study / Ferenc Kalmár, Béla Bodó, Baizhan Li, Tünde Kalmár
Dátum:	2024
ISSN:	2075-5309
Megjegyzések:	The main objectives of this study were the energy assessment of detached houses built in different periods in a central European city. A total of 236 detached houses built between 1930 and 2023 in Debrecen (Hungary) were analyzed from an energy perspective, and their CO2 emissions were measured. It was found that the net floor area of family houses built in recent years has increased but that the compactness of buildings has increased as well. The specific heat loss coefficient and the specific energy demand for heating in new buildings have decreased to 15.2% and 18.5%, respectively, over the last 90 years. Furthermore, around one third of the analyzed buildings built several decades ago must have already been renovated at least once for energy efficiency, as their heat demands are 27.6-41.4% lower than estimated. Energy consumption in six houses built in recent years was measured and studied. It was found that the occupants` behavior may increase CO2 emissions from heating by 26%, while CO2 emissions from hot-water preparation may decrease by 38.2%. The potential of the locally available sources of renewable energy was calculated, and the costs of decarbonization packages for eight building groups were evaluated.
Tárgyszavak:	Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk decarbonization detached houses renovation behavior renewable energy sources
Megjelenés:	Buildings. - 14 : 6 (2024), p. 1-19. -
További szerzők:	Bodó Béla (1980-) (gépészmérnök, épületgépész) Li, Baizhan Kalmár Tünde (1978-) (gépészmérnök)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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