Browsing Laboratoř přenosu tepla a proudění by Title
Now showing items 1-20 of 33
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An analysis on energy demands in airborne particulate matter filtration using hollow-fiber membranes
(Elsevier, 2021-05-12)This work analyzes energy requirements for drawing the air through a hollow-fiber membrane (HFM) during air filtration. Polypropylene HFMs varying in inner fiber diameter (230 and ) were used to separate the ASHRAE A2 fine ... -
An Assessment on Average Pressure Drop and Dust-Holding Capacity of Hollow-Fiber Membranes in Air Filtration
(MDPI, 2021-06-24)In this work, we tried to analyze dust loading behavior of polypropylene hollow fiber membranes using average pressure drop models. Hollow fiber membranes varying in fiber diameter were loaded with a standardized test dust ... -
Case study of liquid cooling of automotive headlights with hollow fiber heat exchanger
(Elsevier, 2021-12-04)Thermal performance of small liquid cooling systems based on polymeric hollow fibers was experimentally studied for the cooling of automotive lighting components integrated with high power Light Emitting Diodes (LEDs). ... -
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 ... -
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 ... -
Comparison of a Novel Polymeric Hollow Fiber Heat Exchanger and a Commercially Available Metal Automotive Radiator
(MDPI, 2021-04-06)A novel heat exchanger for automotive applications developed by the Heat Transfer and Fluid Flow Laboratory at the Brno University of Technology, Czech Republic, is compared with a conventional commercially available metal ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Hydrodynamically enhanced electrochemical mass transfer on the surface of an electrically conductive droplet
(Springer, 2021-04-09)A fully coupled model is proposed to investigate the influence of flow on electrochemical mass transfer at the interface between the electrolyte and an electrically conductive droplet. The electric current flows through ... -
Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency
(MDPI, 2021-04-07)Polymers with highly conductive fillers could possibly replace standardly used materials, such as aluminum and copper alloys, for passive cooling purposes. The main problem of the composite polymer-based heat sinks is that ... -
Influence of Ambient Temperature on Radiative and Convective Heat Dissipation Ratio in Polymer Heat Sinks
(MDPI, 2021-06-12)Miniaturization of electronic devices leads to new heat dissipation challenges and traditional cooling methods need to be replaced by new better ones. Polymer heat sinks may, thanks to their unique properties, replace ... -
Influence of Segmented Rolls on Homogeneity of Cooling in Continuous Casting
(MDPI, 2021-08-02)This paper deals with secondary cooling in a continuous caster. In particular, it deals with cooling inhomogeneity caused by spray arrangement and segmented rolls used for leading the strand. The cooling section is placed ... -
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 ... -
Influence of the remaining water layer on the cooling of moving steel surfaces
(Tanger, 2021-09-15)Steel is an integral part of today's life. To obtain the desired mechanical properties of hot rolled steel plates or strips, it is necessary to predict and control the cooling process. Cooling of a hot rolled strip on 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 ... -
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 ... -
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. ...