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The design of ETICS using insulation core made of aerated concrete
Machala, David ; Zach,, Jiří (referee) ; Drochytka, Rostislav (advisor)
This thesis deals with theoretical suggestions of contact self-supporting insulation system with an insulating core made of porous concrete. The text prepared knowledge about ETICS system, the properties of porous concrete are thoroughly described, including the history and the most often used technology for production of porous concrete. The conclusion is made by comparison of economical and thermal insulation criteria using optimizing calculation and the applicability criteria of proposed ETICS are stated.
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SMV-2015-19: Influence of the compression on the thermal conductivity of the MLI spacers
Králík, Tomáš
The experimental study was aimed on characterisation of the thin insulation materials – spacers used in multilayer insulations (MLI). The MLI is composed of reflective foils interleaved by insulating spacers. The samples were made of various materials (glass fibre, polyester, silk). The measurement was done in unique apparatus developed at ISI Brno in the year 2014. The main goal of the study was to evaluate the influence of the compression by a precisely controlled load on the thermal conductivity in the range of temperatures 10 K and 300 K. The not yet available results of the study enable optimisation of the MLI with requested properties.
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SMV-2014-21: Thermal properties of MLI spacers
Králík, Tomáš
The goal of the project is to develop and build an apparatus enabling to measure the heat flow across a sample of the MLI spacer. This is thin woven or nonwoven textile. The requested parameter of the measurement is precisely controlled compression of the sample between contact surfaces with defined temperature in the range of 10 K – 300 K. The compression equals to the load 0.2 g-2 g and it has to be constant despite the thermal dilatations in the apparatus. An electromechanical loading system with load sensor in a feedback control placed in the warm part of the apparatus was developed for this apparatus. The force is mechanically transferred to the cryogenic part of the apparatus.
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Measurement and prediction of the transport properties of natural gases
Čapla, L. ; Buryan, P. ; Pátek, Jaroslav ; Klomfar, Jaroslav
Measurements of the thermal conductivity of two samples of natural gases performed with a transient hot-wire apparatus are reported. The prediction method for the thermal conductivity of gas mixtures suggested by Stiel and Thodos is tested against the obtained experimental data. The deviations of the experimental thermal conductivities form their calculated values lie within the band from ?2% to 2.5% in the temperature and pressure region relevant for natural gas transport.
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Prediction of the transport properties of multicomponent dense gas mixtures
Pátek, Jaroslav ; Klomfar, Jaroslav
An implementation of the Thorne-Enskog equation for the evaluation of the thermal conductivity and viscosity of high-density fluid mixture is presented. The method is based upon the rigid-sphere model of the fluid mixture suitably interpreted to apply real fluids. The procedure requires the knowledge of the transport properties of the pure component gases at igh density, the zero-density values of the transport properties both for the pure components and for their binary mixtures.
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