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001-es BibID:BIBFORM106091
035-os BibID:(WoS)000904167500001 (Scopus)85144828179
Első szerző:Lakatos Ákos (fizikus, környezetmérnök, létesítménymérnök)
Cím:Thermal insulation capability of nanostructured insulations and their combination as hybrid insulation systems / Lakatos Ákos
Dátum:2023
ISSN:2214-157X
Megjegyzések:The applications of insulation materials in buildings and vehicles are more important than ever. Therefore, the application of thermal insulation materials having high-performance heat-blocking properties such as nano-structured insulations like aerogels and graphite polystyrene is essential. In this paper a comprehensive thermal characterization will be presented, executed on two types of fibrous aerogels (slentex, pyrogel) as well as on graphite-expanded polystyrene, to compare their thermal insulation capability. Moreover, their possible sandwich-structured application as hybrid insulation systems was tested, too. The surface analysis of the samples is going to be presented through microscopic and wetting experiments. Thermal conductivity as well as specific heat capacity measurement results of both individual and sandwich structures will be shown. Slentex aerogel has the lowest thermal conductivity and performed best of all. The results of the hybrid structures are promising. The moisture uptake of the pyrogel aerogel is the highest. Based on the measured values theoretical models will be applied for validation, moreover, a face-to-face analysis will also be presented. Furthermore, calculations regarding thermal properties will also be highlighted. Results of both infrared absorption tests and differentiated scanning calorimetry would help the decision makers and it proves the high infrared absorption of graphite polystyrene.
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Thermal conductivity
Graphite polystyrene
Aerogels
Microscopy
Specific heat capacity
Megjelenés:Case Studies in Thermal Engineering. - 41 (2023), p. 1-16. -
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2.

001-es BibID:BIBFORM092654
035-os BibID:(cikkazonosító)100966 (WoS)000647801400006 (Scopus)85104028833
Első szerző:Lakatos Ákos (fizikus, környezetmérnök, létesítménymérnök)
Cím:Experimental verification of thermal properties of the aerogel blanket / Ákos Lakatos, Attila Csík, István Csarnovics
Dátum:2021
ISSN:2214-157X
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Case Studies in Thermal Engineering. - 25 (2021), p. 1-17. -
További szerzők:Csik Attila (1975-) (fizikus) Csarnovics István (1986-) (fizikus)
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3.

001-es BibID:BIBFORM119517
035-os BibID:(cikkazonosító)104284
Első szerző:Szabó Ákos
Cím:Thermal analysis of aerogels and their vacuum-formed forms, their potential uses, and their effects on the environment / Ákos Szabó, Ákos Lakatos
Dátum:2024
ISSN:2214-157X
Megjegyzések:The main topic of the paper is to investigate the thermal examination of aerogels and their vacuumed forms, application possibilities, and environmental impact. In the paper, the thermal conductivity of homemade vacuum insulation panels was tested with different silica-based core materials. Three types of fibrous aerogel materials were used as core materials; another silicabased microporous insulation was used as a filling material. Microscopic images were taken from the core materials; furthermore, the thermal conductivities of both base materials and their vacuumed form were also tested at different mean temperatures (0, 10 and 20 oC). The results regarding the applicability of these materials as filling-core materials for vacuum insulation panels are interesting. The results showed that for microtherm and pyrogel, the thermal conductivities decreased more than 15%, while for the spaceloft and slentex it was about 8 and 2%, respectively, after evacuating the air. The paper also presents compressibility changes of the samples after vacuumization. The results were used as a basis for building energetic calculations; furthermore, the comparison of different materials from their carbon footprint point of view was also presented. These calculations depicted aerogel's very long payback time with a current market price.
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
thermal insulation
aerogels
vacuum insulation panels
thermal conductivity
CO2 footprint
Megjelenés:Case Studies in Thermal Engineering. - 56 (2024), p. 1-13. -
További szerzők:Lakatos Ákos (1983-) (fizikus, környezetmérnök, létesítménymérnök)
Pályázati támogatás:TKP2021-NKTA-34
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