Počet záznamů: 1
Impact of contamination of a metallic surface on its thermal absorptivity
- 1.
SYSNO ASEP 0618877 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Impact of contamination of a metallic surface on its thermal absorptivity Tvůrce(i) Frolec, Jiří (UPT-D) RID, ORCID, SAI
Králík, Tomáš (UPT-D) RID, ORCID, SAI
Krutil, Vojtěch (UPT-D) ORCID, RID, SAICelkový počet autorů 3 Zdroj.dok. Cryogenics 2023. The 17th IIR International Conference, Dresden, Germany, April 25-28, 2023. Proceedings. - Paris : International Institute of Refrigeration, 2023 - ISSN 0151-1637 - ISBN 978-2-36215-053-1 Rozsah stran s. 59-64 Edice Refrigeration Science and Technology Poč.str. 6 s. Forma vydání Online - E Akce Cryogenics 2023. IIR International Conference /17./ Datum konání 25.04.2023 - 28.04.2023 Místo konání Dresden Země DE - Německo Typ akce WRD Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Heat Transfer ; Thermal Radiation ; Cryogenics ; Contamination ; Cryostat Design Vědní obor RIV BJ - Termodynamika Obor OECD Thermodynamics Institucionální podpora UPT-D - RVO:68081731 UT WOS 001304903400008 DOI https://doi.org/10.18462/iir.cryo.2023.0142 Anotace Very low absorptivity values of metallic surfaces, which are often used in cryogenic systems, help to reduce the heat load transferred by thermal radiation on their cold parts. Low absorptivity may be, however, enhanced by an undesirable contaminant. Using dedicated apparatus in our laboratory, we measured total hemispherical absorptivity of a thin layer of ice, a mineral oil used in vacuum pumps, two different vacuum greases and a powdery basanite material, each applied individually in comparable amounts (approx. 0.23 mg.cm(-2)) on an aluminium surface. The contaminated surface was then exposed to thermal radiation emitted by a source at temperatures ranging from 20 K up to 280 K. Compared to the bare aluminium surface, we observed a significant increase of the original absorptivity after the contamination process and in the case of the powdery material also a nonlinear response to increasing irradiation. Our findings may have practical relevance for the design and thermal management of spacecrafts as well as ground-based cryogenic systems. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2025 Elektronická adresa https://iifiir.org/fr/fridoc/impact-de-la-contamination-d-une-surface-metallique-sur-son-147065
Počet záznamů: 1