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Toplotna prevodnost gradbenih materialov : diplomska naloga
Nusdorfer, Marko (Author), Jagličić, Zvonko (Mentor) More about this mentor... This link opens in a new window, Antolinc, David (Co-mentor)

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Abstract
Izdelali smo merilnik toplotne prevodnosti in izmerili toplotno prevodnost dveh materialov. Najprej smo opisali standarde, ki se navezujejo na merjenje toplotne prevodnosti gradbenih materialov. Nato smo raziskali princip delovanja obstoječih merilnikov, ki so na voljo na tržišču. Toplotno prevodnost homogenega materiala smo ugotovili tako, da smo izmerili gostoto toplotnega toka pri danem temperaturnem gradientu in debelini vzorca. Merilnik smo sestavili iz grelnika, dveh senzorjev gostote toplotnega toka in temperature, ročnim kontrolerjem za zajem podatkov in ventilatorja. Natančnost merilnika smo ocenili tako, da smo za isti preizkušanec primerjali izmerjene vrednosti toplotne prevodnosti z vrednostmi izmerjenimi na certificiranem komercialnem merilniku. Nazadnje smo izmerili toplotno prevodnost dveh toplotno-izolacijskih materialov: porobetona in ekstrudiranega polistirena. Porobetonski preizkušanec smo merili v suhem in vlažnem stanju. Ugotovili smo, da toplotna prevodnost porobetona raste približno linearno z relativno vlažnostjo preizkušanca.

Language:Slovenian
Keywords:toplotna prevodnost, gostota toplotnega toka, merilnik toplotne prevodnosti, relativna vlažnost materiala, XPS, porobeton
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2017
Publisher:[M. Nusdorfer]
UDC:699.8:721(043.2)
COBISS.SI-ID:8143201 Link is opened in a new window
Views:1349
Downloads:530
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Secondary language

Language:English
Title:Thermal conductivity of building materials : Graduation thesis
Abstract:
A thermal conductivity meter was assembled and the thermal conductivity of two materials was measured. We have done standards rewiev which are describing the measurements of thermal conductivity of building materials and the main working principles of the thermal conductivity meters currently available on the market. In order to calculate a thermal conductivity of homogeneous material we measured a heat flux through sample of known thickness and a temperature gradient. The assembled thermal conductivity meter consists of a heater, two heat flux sensors, data logger and a fan. The precision of the apparatus was estimated by comparing the thermal conductivity determined by certified thermal conductivity meter, with our result. Finally, we measured the thermal conductivity of two insulating building materials: aerated concrete and extruded polystyrene. The aerated concrete was measured in various humidity conditions. The thermal conductivity of aerated concrete increases approximately linearly with the relative humidity increasing of the sample.

Keywords:thermal conductivity, thermal conductivity meter, material moisture, XPS, autoclaved aerated concrete

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