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Nový tlakový snímač pro aplikaci v mikro chemickém inženýrství
Steckenborn, A. ; Křišťál, Jiří ; Kareš, T. ; Jiřičný, Vladimír ; Sichler, P. ; Krause, P.
In the contribution the construction and technical data of the flow-through micro channel pressure probe (FMPP) – a new In-Line Pressure Sensor – are presented. The experimental data of pressure drop measurements with different micro channels are compared: a micro reactor with rectangular channel and low aspect ratio and capillaries with inner diameters of 1.0, 0.5 and 0.1 mm. This work shows the capability of the probe for pressure drop measurements in one-phase flow (gas or liquid) and introductory measurement of two-phase gas-liquid flows. Some limits with the present state of the development are shown.
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Mathematical Optimisation of Geometry of the Microstructured Bipolar Electrolyser
Kodým, R. ; Bystroň, T. ; Křišťál, Jiří ; Jiřičný, Vladimír ; Bouzek, K.
In this work a 3-dimmensional mathematical model of the secondary current density distribution has been proposed and implemented. A parametric study of the influence of selected geometrical parameters, electrolyte conductivity and current load on the parasitic current value was performed. The Laplace equation describing the Galvani potential distribution was solved by Finite Element Method in COMSOL Multiphysics^TM environment. The mathematical model results have shown that the value of parasitic current is mainly affected by the electrolyte conductivity and interelectrode distance (i.e. active cross-section of the electrolyte distributors). Using the geometry optimization the parasitic currents have been minimized to an acceptable value, i.e. below the 5% of the total current load.
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