Analiza i primjena dinamickog mjerenja toplinske vodljivosti građevinskih materijala

Bezjak, Mladen (2007) Analiza i primjena dinamickog mjerenja toplinske vodljivosti građevinskih materijala. = Analisis and using of thermal conductivity dynamic measurement of building materials. Doctoral thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Zvizdić, Davor.

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28_09_2007_doktorat.pdf - Published Version Jezik dokumenta:Croatian

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Abstract (Croatian)

Temelj ove disertacije su dinamička mjerenja toplinske provodnosti građevnih materijala metodom vruće žice. Postavljen je teorijski model s analitičkim i numeričkim rješenjem i provedena su mjerenja na stvarnim uzorcima toplinsko-izolacijskih materijala koji se ponajviše rabe u graditeljstvu. Projektiran je i izrađen mjerni sustav koji zadovoljava svim teoretskim zahtjevima i pretpostavkama. Budući da se dosadašnja praksa ispitivanja toplinskih svojstava građevnih materijala sastoji od mjerenja metodom zaštićene vruće ploče (Pönsgen) u ustaljenom stanju, provedena su i usporedna mjerenja na istovrsnim uzorcima pomoću ove metode. Oba mjerna sustava su detaljno opisana i procijenjena im je mjerna nesigurnost. Hipoteza disertacije jest da se za određene vrste građevnih materijala mogu primjenjivati obje metode, što je značajno s obzirom da je dinamička mjerna metoda jeftinija i traje bitno kraće od stacionarne. Rezultati usporednih mjerenja prikazani su tablicama i dijagramima za svaku grupu materijala posebno.

Abstract

This work is based on dynamic thermal conductivity measurements of building materials by the hot wire method. Analytical and numerical solutions were developed from the established theoretical model. Measurements were performed on the samples which represent those building materials that most commonly used as thermal isolators. Established measuring system fulfils all theoretical requirements and presumptions that came out of the analytical solution. Regarding the fact that thermal properties of building materials are commonly tested by standard guarded hot plate method (Pönsgen) in stady-state conditions, those stationary measurements are performed on the same samples as dynamic measurements. Both measurement systems are described in detail and measurement uncertainties were estimated. The hypothesis is that for the certain types of building materials both methods are appropriate. This is very important, because dynamic measurements cost less and need less time than methods in stady-state conditions. The results of comparisons with both methods are shown by tables and diagrams, for each types of building materials.

Item Type: Thesis (Doctoral thesis)
Uncontrolled Keywords: toplinska provodnost; dinamicko mjerenje; vruca žica; građ evni materijali
Keywords (Croatian): thermal conductivity; dynamic measurement; hot wire; building materials
Divisions: 300 Department of Thermodynamics, Thermal and Process Engineering > 320 Chair of Thermal and Process Engineering
Date Deposited: 22 Sep 2014 18:00
Last Modified: 01 Dec 2020 10:52
URI: http://repozitorij.fsb.hr/id/eprint/208

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