"RIV/61989100:27360/05:00013124!RIV06-GA0-27360___" . "Koval, L." . "TANGER, spol.s.r.o. Ostrava" . . . "[EE7F4F776AD1]" . . "3"^^ . "546359" . . "Thermal stabilisation of the system during measurement thermophysical quantities by steady method"@en . . . . "P(GP106/03/D200)" . "Experimental equipment for determination the thermophysical quantities (thermal conductivity, diffusivity and electrical resistivity) at Thermal Technology Depatrment (V\u0160B - Technical University of Ostrava) is able to measure the cylindrical specimens (max. 10 mm dia., 178 mm lenght), solid, electrically conductive materials (e.g. steel). Experimental equipment uses the direct electrical heating in accordance with Joule - Lenz law. In mathematical point of view is using Poisson equation - it is known inner heat source, temperature field and steady state. For steady state methods it is important to obtain the equilibrium of system so as the scanning output data have been relevant. In this case the heat flux equilibrium is based on two heat flux equilibrium - first heat flux is supplied by electrical heating, second heat flux is taken away from water calorimeter. Both heat flux have to be in equilibrium. To keep the heat flux equilibrium it is used automatic control of measuring system. The basic part o"@en . "Thermal stabilisation of the system during measurement thermophysical quantities by steady method"@en . "2"^^ . "Tepeln\u00E9 ust\u00E1len\u00ED soustavy p\u0159i m\u011B\u0159en\u00ED termofyzik\u00E1ln\u00EDch veli\u010Din stacion\u00E1rn\u00ED metodou"@cs . . "Mach\u00E1\u010Dkov\u00E1, Ad\u00E9la" . . "Tepeln\u00E9 ust\u00E1len\u00ED soustavy p\u0159i m\u011B\u0159en\u00ED termofyzik\u00E1ln\u00EDch veli\u010Din stacion\u00E1rn\u00ED metodou" . . "Tepeln\u00E9 ust\u00E1len\u00ED soustavy p\u0159i m\u011B\u0159en\u00ED termofyzik\u00E1ln\u00EDch veli\u010Din stacion\u00E1rn\u00ED metodou" . "steady-state method; direct electrical heating; thermopfysical quantities"@en . "RIV/61989100:27360/05:00013124" . . "27360" . . . "Experiment\u00E1ln\u00ED za\u0159\u00EDzen\u00ED pro ur\u010Den\u00ED termofyzik\u00E1ln\u00EDch veli\u010Din (tepeln\u00E1 a teplotn\u00ED vodivost, rezistivita) katedry tepeln\u00E9 techniky Vysok\u00E9 \u0161koly b\u00E1\u0148sk\u00E9 - Technick\u00E9 univerzity Ostrava je schopn\u00E9 m\u011B\u0159it vzorky v\u00E1lcov\u00E9ho tvaru do pr\u016Fm\u011Bru 10 mm a kone\u010Dn\u00E9 d\u00E9lky 178 mm, pevn\u00E9, elektricky vodiv\u00E9 materi\u00E1ly (nap\u0159. ocel). Experiment\u00E1ln\u00ED za\u0159\u00EDzen\u00ED vyu\u017E\u00EDv\u00E1 metody odporov\u00E9ho oh\u0159evu dle Jouleova - Lenzova z\u00E1kona. Z matematick\u00E9ho hlediska vyu\u017E\u00EDv\u00E1 Poissonovy rovnice, tedy znalosti vnit\u0159n\u00EDho objemov\u00E9ho zdroje, znalosti teplotn\u00EDho pole a stacion\u00E1rn\u00EDho stavu. D\u016Fle\u017Eit\u00E9 pro stacion\u00E1rn\u00ED metody m\u011B\u0159en\u00ED je dosa\u017Een\u00ED tepeln\u00E9ho ust\u00E1len\u00ED cel\u00E9 soustavy tak, aby sn\u00EDman\u00E9 elektrick\u00E9 veli\u010Diny pot\u0159ebn\u00E9 pro v\u00FDpo\u010Det termofyzik\u00E1ln\u00EDch veli\u010Din byly relevantn\u00EDmi. Tepeln\u00E9 ust\u00E1len\u00ED je zalo\u017Eeno na rovnov\u00E1ze dvou tepel - tepla dodan\u00E9ho odporov\u00FDm oh\u0159evem do vzorku a tepla odveden\u00E9ho kalorimetrem do chladic\u00ED vody. Tyto tepeln\u00E9 toky musej\u00ED b\u00FDt v rovnov\u00E1ze. K udr\u017Eov\u00E1n\u00ED tepeln\u00E9 rovnov\u00E1hy je vyu\u017Eita automatick\u00E1 regulace m\u011B\u0159ic\u00EDho syst\u00E9mu. Z\u00E1kladn\u00ED \u010D\u00E1st\u00ED auto"@cs . . . "Tepeln\u00E9 ust\u00E1len\u00ED soustavy p\u0159i m\u011B\u0159en\u00ED termofyzik\u00E1ln\u00EDch veli\u010Din stacion\u00E1rn\u00ED metodou"@cs . . "Experiment\u00E1ln\u00ED za\u0159\u00EDzen\u00ED pro ur\u010Den\u00ED termofyzik\u00E1ln\u00EDch veli\u010Din (tepeln\u00E1 a teplotn\u00ED vodivost, rezistivita) katedry tepeln\u00E9 techniky Vysok\u00E9 \u0161koly b\u00E1\u0148sk\u00E9 - Technick\u00E9 univerzity Ostrava je schopn\u00E9 m\u011B\u0159it vzorky v\u00E1lcov\u00E9ho tvaru do pr\u016Fm\u011Bru 10 mm a kone\u010Dn\u00E9 d\u00E9lky 178 mm, pevn\u00E9, elektricky vodiv\u00E9 materi\u00E1ly (nap\u0159. ocel). Experiment\u00E1ln\u00ED za\u0159\u00EDzen\u00ED vyu\u017E\u00EDv\u00E1 metody odporov\u00E9ho oh\u0159evu dle Jouleova - Lenzova z\u00E1kona. Z matematick\u00E9ho hlediska vyu\u017E\u00EDv\u00E1 Poissonovy rovnice, tedy znalosti vnit\u0159n\u00EDho objemov\u00E9ho zdroje, znalosti teplotn\u00EDho pole a stacion\u00E1rn\u00EDho stavu. D\u016Fle\u017Eit\u00E9 pro stacion\u00E1rn\u00ED metody m\u011B\u0159en\u00ED je dosa\u017Een\u00ED tepeln\u00E9ho ust\u00E1len\u00ED cel\u00E9 soustavy tak, aby sn\u00EDman\u00E9 elektrick\u00E9 veli\u010Diny pot\u0159ebn\u00E9 pro v\u00FDpo\u010Det termofyzik\u00E1ln\u00EDch veli\u010Din byly relevantn\u00EDmi. Tepeln\u00E9 ust\u00E1len\u00ED je zalo\u017Eeno na rovnov\u00E1ze dvou tepel - tepla dodan\u00E9ho odporov\u00FDm oh\u0159evem do vzorku a tepla odveden\u00E9ho kalorimetrem do chladic\u00ED vody. Tyto tepeln\u00E9 toky musej\u00ED b\u00FDt v rovnov\u00E1ze. K udr\u017Eov\u00E1n\u00ED tepeln\u00E9 rovnov\u00E1hy je vyu\u017Eita automatick\u00E1 regulace m\u011B\u0159ic\u00EDho syst\u00E9mu. Z\u00E1kladn\u00ED \u010D\u00E1st\u00ED auto" . "80-86840-13-1" . . "Pyszko, Ren\u00E9" .