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Radiation heat transfer in foam insulationKrope, Jurij ; Črepinšek, Ljubomir, 1936-2023 ; Goričanec, DarkoV komercialnem smislu predstavlja nizka termična prevodnost poliuretanske toge pene njeno najpomembnejšo lastnost. Temeljni mehanizem prenosa toplote skozi togo poliuretansko peno sestoji iz treh ... elementov: prenosa toplote s toplotno prevodnostjo skozi plinsko stanje [lambda]g, s toplotno prevodnostjo skozi trdno stanje [lambda]s in z radiacijo [lambda]r. Ocenjene vrednosti za [lambda]g so podane, in iz znane [lambda] vrednosti poluretanske pene dobimo razliko med njima, t.j. [lambda]r. Tretjina prenosa toplote skozi poliuretansko peno se zgodi zaradi radiacije. Termično radiacijo smo napovedali za območja, ki nastajajo v presekih celic, prav tako pa smo upoštevali vplive celičnih sten. Pri obstoječi tehnologiji pene lahko [lambda]r zreduciramo na teoretični miminum, če upoštevamo vpliv velikosti celice in druge faktorje, ki vplivajo na vrednost [lambda]r. Z uporabo poliolnga sistema v kombinaciji z visoko funkcionalnimi izocianati lahko začetno vrednost [lambda] znižamo, nadaljna optimizacija pa je v poteku.Source: Renewable energy: research and applications : proceedings of 1992 International renewable energy conference (June 22-26, 1992) (Str. II/767-774)Type of material - conference contributionPublish date - 1992Language - englishCOBISS.SI-ID - 3770116
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Krope, Jurij | 03022 |
Črepinšek, Ljubomir, 1936-2023 | 03011 |
Goričanec, Darko | 06003 |
Source: Personal bibliographies
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