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001-es BibID:	BIBFORM128302
Első szerző:	Lakatos Ákos (fizikus, környezetmérnök, létesítménymérnök)
Cím:	Thermal Performance and Aging Effects to model the Life Cycle Assessment of Heat-Protective Thermal Insulation Materials in Pipe Systems / Ákos Lakatos, Attila Csík, Elena Lucchi, Angela Daniela La Rosa
Dátum:	2025
ISSN:	0735-1933
Megjegyzések:	Most power plants and district heating systems employ rock wool or ceramic fiberglass insulations to insulate their pipes. Over time, these materials lose some qualities. The present study tested two thermal insulation materials for applications in pipelines carrying hot steam in power plants or district heating (DH) systems: ceramic fiberglass (insulfrax) and flexible mineral wool. Thermal conductivity was measured at high temperatures (150 and 250 oC), simulating the effect of the passage of time. It was found that insulfrax had lower thermal conductivity in all cases 0.025-0.031 W/mK, compared to the mineral wool (0.038-0.422 W/mK). However, thermal conductivity of the mineral wool was continuously increasing (3% and 9%), and the thermal conductivity of the insulfrax jumped only after thermal annealing at 250 oC, but by about 24%. Scanning electron microscopic imaging and differential scanning calorimetry experiments were used to reveal any possible changes in the structures of the materials after thermal annealing them at 150 and 250 °C for 1 day. The change in the specific heat was also calculated with differential scanning calorimetry, and crystallization processes were deduced. Finally, a comparative life cycle assessment was applied to select materials based on environmental performance, aligning with the Sustainable Development Goals requirements.
Tárgyszavak:	Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk ceramic thermal insulations thermal conductivity heat treatment LCA
Megjelenés:	International Communications in Heat and Mass Transfer. - 164 : A (2025), p. 1-12. -
További szerzők:	Csík Attila Lucchi, Elena La Rosa, Angela Daniela
Pályázati támogatás:	TKP2021-NKTA-34 Egyéb
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI Szerző által megadott URL
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001-es BibID:	BIBFORM118352
035-os BibID:	(WoS)001178535600001 (Scopus)85183998649
Első szerző:	Lakatos Ákos (fizikus, környezetmérnök, létesítménymérnök)
Cím:	Thermal performances of Super Insulation Materials (SIMs) : a comprehensive analysis of characteristics, heat transfer mechanisms, laboratory tests, and experimental comparisons / Ákos Lakatos, Elena Lucchi
Dátum:	2024
ISSN:	0735-1933
Megjegyzések:	New buildings are subject to more stringent regulations that focus on reducing inefficient energy consumption and eliminating associated harmful emissions. This challenge has been exacerbated by the current energy crisis. As a result, there has been an increase in the development of energy-efficient and environmentally friendly design strategies, technologies, and building materials. This study addresses critical knowledge gaps in Super Insulation Materials (SIMs), such as aerogel, vacuum insulation panels, and graphite-doped polystyrene foam. Despite their excellent insulation properties, these materials face challenges due to a lack of information on their properties, heat transfer mechanisms, test procedures for thermal evaluation, and performance comparisons between different types of SIMs. Through an innovative theoretical approach and laboratory tests, this study creates a complete scientific framework to understand thermal conduction models, performances, and characteristics in SIMs` application, compared to conventional insulations. We show thermal conductivity measurement results with excellent values belonging to vacuumized aerogels. We further state that graphite addition to white EPS reduces the thermal conductivity, but enhances the moisture up-take and infrared degradation.
Tárgyszavak:	Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Thermal conduction models Super Insulation Material SIMs Aerogels Vacuum insulation panels graphite EPS
Megjelenés:	International Communications in Heat and Mass Transfer. - 152 (2024), p. 1-12. -
További szerzők:	Lucchi, Elena
Pályázati támogatás:	TKP2021-NKTA-34 Egyéb TKP2021-NKTA Egyéb
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
Borító:
Saját polcon: