Browsing Laboratoř přenosu tepla a proudění by Issue Date
Now showing items 1-20 of 33
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Low Cost Membrane Contactors Based on Hollow Fibres
(EDP Sciences, 2012-04-16)Membrane contactors are used to solve different chemical engineering tasks (e.g. water saturation with gases). Such elements are traditionally used for bubble less oxidation of blood. However, their industrial applications ... -
Water chamber geometry and stabilizer construction effect on water pressure distribution of high pressure descaling nozzles
(EDP Sciences, 2012-04-16)High pressure descaling nozzles are used mainly for removing oxides from hot steel products. The homogeneity and intensity of water pressure distribution on the oxidised surface are very important characteristics for a ... -
Experimental investigation of heat transfer between hot air nozzle flow and cylinder
(EDP SCIENCES, 2012-04-16)A variety of experimental measurements were performed to clarify the influence of air pressure and distance from a nozzle outlet on the heat transfer intensity between a cylinder's surface and the hot air flowing around ... -
Nozzle cooling of hot surfaces with various orientations
(EDP Sciences, 2012-04-16)The aim of this research is an investigation of hot surface orientation influence on heat transfer during cooling by a nozzle. Two types of nozzles were used for the experiments (air-mist nozzle and hydraulic nozzle). A ... -
Landfills multiple goal optimization using equationless qualitative relations
(Science Publication, 2014-02-05)Landfills are unique and difficult to measure. Their optimization must be solved with a severe lack of information. The privilege of not utilizing information items based on common sense cannot be afforded, as this represents ... -
Mutual collision of water jets from adjacent high pressure flat jet nozzles on flat surfaces during hydraulic descaling
(Technical faculties of the Josip Juraj Strossmayer University of Osijek, 2016-10-13)High energetic water jets sprayed from nozzles are used for scale removal. Special nozzles with flat and very narrow jets for high feed pressure are used. This process, called descaling, is used in hot rolling, for example. ... -
Numerical Comparison of Prediction Models for Aerosol Filtration Efficiency Applied on a Hollow-Fiber Membrane Pore Structure
(MDPI, 2018-06-19)Hollow-fiber membranes (HFMs) have widely been applied to many liquid treatment applications such as wastewater treatment, membrane contactors/bioreactors, membrane distillation etc. Despite the fact that HFMs are widely ... -
Potential use of blast furnace slag for filtration membranes preparation: A pilot study
(IOP Publishing, 2018-07-12)This paper investigates the possibilities of the use of sodium hydroxide activated blast furnace slag for preparation of filtration barriers. The motivation for this research is searching for cheaper and more eco-friendly ... -
Experimental study of in-line heat treatment of 1.0577 structural steel
(Elsevier, 2018-09-16)In-line heat treatment is frequently used in rolling mills because it offers a significant improvement of rolled product mechanical properties with costs benefits. This method allows achieving required mechanical properties ... -
CFD Simulation of Defogging Effectivity in Automotive Headlamp
(MDPI, 2019-07-01)In the past decade, the condensation of internal air humidity in automotive headlamps has become more prevalent than ever due to the increased usage of a new light source—LEDs. LEDs emit far less heat than previously-used ... -
Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle
(MDPI, 2019-12-03)Spiral nozzles are widely used in wet scrubbers to form an appropriate spray pattern to capture the polluting gas/particulate matterwith the highest possible efficiency. Despite this fact, and a fact that it is a nozzle ... -
A Parametric Study of the Vacuum Arc Remelting (VAR) Process: Effects of Arc Radius, Side-Arcing, and Gas Cooling
(Springer Nature, 2020-02-01)Main modeling challenges for vacuum arc remelting (VAR) are briefly highlighted concerning various involving phenomena during the process such as formation and movement of cathode spots on the surface of electrode, the ... -
A volume of fluid (VOF) method to model shape change during electrodeposition
(Elsevier, 2020-03-01)A novel volume of fluid (VOF) based approach is proposed to simulate the transient shape change of deposit front during electrodeposition considering secondary current distribution. Transport phenomena such as electrolyte ... -
The Influence of the Fibres Arrangement on Heat Transfer and Pressure Drop of Polumeric Hollow Fibre Heat Exchangers
(CZECH TECHNICAL UNIV PRAGUE, 2020-04-30)Polymeric hollow fibre heat exchangers are the new alternative to common metal heat exchangers. These heat exchangers provide advantages, such as low weight, corrosion resistance, easy shaping and machining. Moreover, they ... -
A Numerical Investigation on the Electrochemical Behavior of CaO and Al2O3 in the ESR Slags
(Springer Nature, 2020-06-01)Field structures including electromagnetic, concentration of ions, and flow fields in an ESR-like process composed of a graphite crucible containing a molten slag, air, and an iron electrode are computed. Both CaF2-(mass ... -
Spray cooling heat transfer above leidenfrost temperature
(MDPI, 2020-09-01)This study considers spray cooling starting at surface temperatures of about 1200 °C and finishing at the Leidenfrost temperature. Cooling is in the film boiling regime. The paper uses experimental techniques for the study ... -
Chaotised polymeric hollow fibre bundle as a crossflow heat exchanger in air-water applicationChaotised polymeric hollow fibre bundle as a crossflow heat exchanger in air-water application
(Czech Technical University in Prague, 2020-09-01)Fifteen years ago, polymeric hollow fibre heat exchangers were presented for the first time. Nowadays there are not only the shell-and-tube types as there were at the beginning. In this paper, six chaotised polymeric hollow ... -
Fouling of Polymeric Hollow Fiber Heat Exchangers by Air Dust
(MDPI, 2020-11-02)Currently, liquid-to-gas heat exchangers in buildings, domestic appliances and the automotive industry are mainly made of copper and aluminum. Using plastic instead of metal can be very beneficial from an economic and ... -
Prediction of Leidenfrost Temperature in Spray Cooling for Continuous Casting and Heat Treatment Processes
(MDPI, 2020-11-22)Spray cooling of hot steel surfaces is an inherent part of continuous casting and heat treatment. When we consider the temperature interval between room temperature and for instance 1000 degrees C, different boiling regimes ... -
Fully Polymeric Distillation Unit Based on Polypropylene Hollow Fibers
(MDPI, 2021-03-26)Access to pure water is a very topical issue today. Desalination represents a promising way of obtaining drinking water in areas of shortage. Currently, efforts are being made to replace the metal components of existing ...