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Influence of condensed water on heat radiation absorptivity at cryogenic temperatures
- 1.0351426 - ÚPT 2011 RIV GB eng J - Journal Article
Hanzelka, Pavel - Musilová, Věra - Králík, Tomáš
Influence of condensed water on heat radiation absorptivity at cryogenic temperatures.
Cryogenics. Roč. 50, č. 5 (2010), s. 331-335. ISSN 0011-2275. E-ISSN 1879-2235
R&D Projects: GA AV ČR IAA100650804
Institutional research plan: CEZ:AV0Z20650511
Keywords : radiant properties * heat transfer * cryostats
Subject RIV: BJ - Thermodynamics
Impact factor: 1.124, year: 2010
Influence of water deposit on heat radiation absorptivity of a metallic surface was measured in a device designed for investigation of thermal radiative properties of materials at cryogenic temperatures. In this device heat transfer between planparallel surfaces of radiator and absorber is measured An aluminium sample of 40 mm in diameter was used as absorber. A radiator consisting of an organic composite on a copper disk was used in two experiment stages At temperature of 298 K. water outgassed from the organic layer formed the deposit on the absorber Then the heat emitted from the radiator at temperatures from 45 K up to 250 K was used for the absorptivity measurement Substantial influence of deposit of 85 mg/m(2) on the sample absorptivity was found (C) 2010 Elsevier Ltd All rights reserved.
Permanent Link: http://hdl.handle.net/11104/0191183
Number of the records: 1