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article

New Optimization Strategy of Thermoelectric Coolers Applied to Automotive and Avionic Applications

Tristan Caroff, Claude Sarno, Romain Hodot, Mauro Brignone, more

Materials Today: Proceedings > 2015 > 2 > 2 > 751-760

This paper deals with a new generic approach for multi-criteria optimization of thermoelectric coolers using multi-physic simulations. This approach is based on the determination of the optimal thermal resistance of a thermoelectric cooler in defined thermal environment. This new methodology is used to define optimized Peltier coolers for two specific applications studied in the frame of NANOTEG Eniac...

article

Manufacture of sodium-free lithium chloride from salt lake brine

Jianzhi Sun, Yan Dong, Chunyan Kong, J. Sun, more

Separation and Purification Technology > 2014 > 136 > Complete > 309-313

Process assessment experiment was conducted to investigate the applicability of integration technology (CCI, concentration, cooling and ion exchange) to manufacture sodium-free lithium chloride from salt lake brine. The preliminary separation process of sodium from brine, using evaporating concentration by adding surfactant, showed the amount of sodium in brine decreases to below 0.187%. Then, brine...

article

A Recent Development in High-Current Mercury Arc Rectifiers

E. H. Reid, C. C. Herskind

Transactions of the American Institute of Electrical Engineers > 1933 > 52 > 2 > 392 - 396

A single-unit mercury arc rectifier of 3,000-kw rating at 600 volts is discussed as regards design and operation. A typical installation, that of the 8th Avenue subway of the New York Board of Transportation, is described where units of this size have been advantageously applied to the sub-surface substations. An important characteristic of the rectifier unit is its operating temperature which is...

article

Investigation into Increasing the Motor-Drivable Current Using a Thermoelectric Cooling Module

Kazuma Morikawa, Seiichiro Katsura

Power Electronics and Drives > 2022 > Vol. 7 (42) > 279--289

To enhance the performance of humanoids, mobile robots and manipulators, motors are desired to be able to provide high torque without relying on gears. To be able to drive joint motors with high output, the current value that can flow needs to be increased. However, the heat generated by the high current drive can cause motor failure, so cooling is necessary. We used thermoelectric cooling as a new...

article

The analysis of the rolls cooling at push bench in rolling mill plant ŽP A.S.

Michal Kán, Ján Turňa, Milan Mojžiš, Ľubomír Patin, more

Journal of Metallic Materials > 2022 > Vol. 74, no. 1 > 4--8

This article deals with a comprehensive analysis at roll cooling of push bench on a rolling mill during the rolling process of semi-finished products used for the production of seamless tubes. An important issue that we deal with in this issue is the influence of the cooling parameters using special programmable nozzles of various types with the required flow and water pressure on the final surface...

article

Experimental Study of Temperature Influence on the Performance of PV/T Cell under Jordan Climate Conditions

Mohammed Qassim Al-Odat

Journal of Ecological Engineering > 2022 > Vol. 23, nr 10 > 80--88

The electrical performance and the productivity of PV module depend on two main parameters, i.e. the radiation intensity and the cell operating temperature. The module electrical efficiency and productivity are significantly reduced as its temperature increases. Accordingly, cooling of PV modules is one of the most effective techniques to obtain higher efficiency and productivity as well as to reduce...

article

Reusable device for cooling beverages and liquid foods: A novel approach to replace ice in glass

Guruvanna Mahesh Kumar, Manjunatha Mutharayappa, Divyashree Hulluru Rajappa, Bangalore Aswathnarayana Anand

Journal of Food Process Engineering > 45 > 9 > n/a - n/a

Vogue of drinking beverages and liquid foods (BLFs) with ice is embedded and ever increasing in our hasty busy life. Direct use of unsafe ice and/or food ice containing pathogens in BLFs is threat to human health. In the current study, as an alternate to ice, a reusable cooling device was developed to cool some widely consumed BLFs. The device engineered with phase change materials (PCM), namely,...

article

Determining the Influencing Factors on the Cooling of a 3D Printed Thermoforming Mould

Marius‐Andrei Boca, Alexandru Sover, Laurențiu Slătineanu

Macromolecular Symposia > 404 > 1 > n/a - n/a

Using a mould for thermoforming produced by fused filament fabrication implies several limitations, such as thermal damage due to the low thermal conductivity properties of the plastic material. For the cooling of the plastic mould, many different approaches and influencing factors can be considered. This paper identifies those factors, and based on statistical DOE, adequate experiments have been...

article

Effect of ultrasonic vibration time on the molecular stacking structure and mechanical properties of the injection molding workpiece

Dejian Zou, Tongmin Yu, Chunzheng Duan

Polymer Engineering & Science > 62 > 8 > 2498 - 2510

To study the effect of the high‐frequency vibration time on the mechanical properties of the injection molding workpieces, apply an improved ultrasonic vibrator which contains the original ultrasonic vibrator and the mold insert to change the crystal structure during the melt cooling stage. The crystallinity, crystal perfection, and yield stress characteristics of the workpieces under three injection...

article

Active solution heating and cooling in electrospinning enabling spinnability from various solvents

Dunia Abbas, Muhammad S. Mu'min, Marco Bonanno, Simon Thiele, more

Journal of Applied Polymer Science > 139 > 31 > n/a - n/a

Solution electrospinning is a facile method for the production of nanofibrous meshes. Here, we present a syringe‐jacket heat exchanger as a simple add‐on for solution electrospinning, which enables spinning from various solvents by a direct and precise solution temperature control between −20 °C and 100 °C. An effective manipulation of the solvent evaporation rate is enabled by adjusting the temperature...

article

Composite adsorbent materials for desalination and cooling applications: A state of the art

Ahmed S. Alsaman, Eslam Mohamed M. Ibrahim, Mahmoud S. Ahmed, Ahmed A. Askalany

International Journal of Energy Research > 46 > 8 > 10345 - 10371

Adsorption technology is very attractive for producing desalinated water and cooling with no harmful impact on the environment. The performance of adsorption water applications (desalination and cooling) depends on the adsorption characteristics. Many adsorption systems designs were investigated worldwide, employing different adsorbent materials to develop a cost‐effective and high‐performance system...

article

A Technological System for Using Waste Warm Water from Energy Facilities for Effective Agriculture

Vasil Turcheniuk, Anatoliy Rokochinskiy, Lyudmyla Kuzmych, Pavlo Volk, more

Archives of Hydro-Engineering and Environmental Mechanics > 2022 > Vol. 69, nr 1 > 13--25

The waste warm waters from power plants, owing to their temperature regime (25–38°C) and the volumes of discharge, allow for their use for heating of open ground areas in agriculture. Underground heating by such water is a new, special heat and irrigation method which enables not only purposeful regulation of temperature conditions of the crop growing environment, but also dissipates heat in the soil,...

article

Effect of magnetic field on the mixed convection in double lid‐driven porous cavities filled with micropolar nanofluids

Sameh E. Ahmed, Ahmed Kadhim Hussein, M. A. Mansour, Masoud Afrand, more

Numerical Methods for Partial Differential Equations > 38 > 4 > 1090 - 1111

The effect of magnetic field inclination and double lid‐driven on the mixed convection in a square cavity is investigated based on the local thermal non‐equilibrium model. The cavity was filled with a copper–water micropolar nanofluid saturated with a porous medium. The top and bottom walls are considered moving to the left or right directions at a constant velocity. In the current work, the ranges...

article

Numerical Study of Residual Stresses Due to External Cooling in Extruded Polymer Profiles

Michelle M. A. Spanjaards, Martien A. Hulsen, Patrick D. Anderson

Macromolecular Theory and Simulations > 31 > 3 > n/a - n/a

Profile extrusion is a production technique to make polymer profiles and hollow tubes. At a certain distance after the die exit the polymer extrudate is guided into a cooling chamber, where the polymer is cooled extensively to set the part dimensions. Uniform cooling in the cooling chamber is required to avoid warpage and twisting of the extrudate due to differential shrinkage. The effect of extrudate...

article

Effect of the donor's age and type of extender (egg yolk versus clarified egg yolk) over the sperm quality of Majorera bucks preserved at 4°C: In vitro results and fertility trials

Kseniia Iusupova, Miguel Batista‐Arteaga, Sergio Martín‐Martel, María Luisa Díaz‐Bertrana, more

Reproduction in Domestic Animals > 57 > 5 > 524 - 531

This study assessed the effect of donor´s age and two different extenders in the sperm quality of chilled semen in Majorera bucks. In experiment 1, semen was individually processed from 5 young (10–12 months old) and 4 mature (3–5 years old) bucks and then was diluted in two different extenders: EY (Tris‐glucose, 12% egg yolk) and CEY (Tris‐glucose, 12% clarified egg yolk) and cooled at 4°C; semen...

article

Influence of alumina ratio on reactions at the surface of alite crystals during cooling

Matthias Böhm, Aneta Knöpfelmacher

Journal of Microscopy > 286 > 2 > 98 - 101

Microstructural features of industrial Portland cement clinker samples are presented to illustrate the influence of the clinker melt chemistry on the reactions taking place on the surfaces of alite crystals during cooling at high temperatures. While clinker melts rich in Al₂O₃ are usually undersaturated with respect to CaO, leading to corrosion of alite crystals and formation of secondary belite,...

article

Novel battery thermal management system with different shapes of pin fins

Zengjia Guo, Siyuan Zhao, Jian Wang, Yang Wang, more

International Journal of Energy Research > 46 > 5 > 5997 - 6011

Battery thermal management systems (BTMS) with favorable working performance are essential for lithium‐ion battery inside the electrical vehicles. In this research, a novel BTMS is proposed by introducing vertically and horizontally arranged square pin fins (SPFs), circular pin fins (CPFs), and ellipse pin fins (EPFs) into the cold plate. The overall cooling performance (efficiency index: EI) of the...

article

Characterization of short‐term storage of the semen of Trachelyopterus galeatus (Siluriformes: Auchenipteridae) incorporating dimethylsulphoxide (dmso) to the diluent

Caroline Lopes França, Jorgélia de Jesus Pinto Castro, João Mandú da Silva, Ricardo Pinto Santos, more

Aquaculture Research > 53 > 6 > 2218 - 2226

The purpose of this study was to evaluate the effect of adding dimethylsulphoxide cryoprotectant (DMSO) to the diluent used with refrigerated semen of Trachelyopterus galeatus. Semen samples were analysed for colour, volume, pH, motility rate, concentration and morphological changes. Semen, cooled to 4°C, were diluted in Hanks Balanced Saline Solution (HBSS) and HBSS + DMSO at concentrations of 2...

article

Multifunctional patch for use during laser procedures: Optimization and feasibility testing

Yakir S. Levin, Rahib Islam, Mathew M. Avram, Walfre Franco, more

Lasers in Surgery and Medicine > 54 > 1 > 182 - 188

Objective The objective of this study was to develop a patch that can be placed on the skin during laser hair removal and similar procedures, that serves to reduce the laser‐induced plume, provides a ready indicator to the laser surgeon of where pulses have been applied, and cools the skin. Methods A two‐layer patch composed of a cooling hydrogel layer and an indicator layer was optimized and tested...

article

Effect of different dental implant drilling template designs on heat generation during osteotomy – an in vitro study

Lukas Waltenberger, Stephanie Wied, Stefan Wolfart, Taskin Tuna

Clinical Oral Implants Research > 33 > 1 > 53 - 64

Objectives This in vitro study examined the effect of different implant drilling template designs on heat generation during osteotomy and on cooling fluid distribution. Material and methods Five different template designs were investigated in a standardized setup against a control group and a negative control group: Occlusal‐splint‐design (OSD), OSD‐covering, OSD‐lateral opening, Bar design, and...

INFONA - science communication portal

Search results

New Optimization Strategy of Thermoelectric Coolers Applied to Automotive and Avionic Applications

Manufacture of sodium-free lithium chloride from salt lake brine

A Recent Development in High-Current Mercury Arc Rectifiers

Investigation into Increasing the Motor-Drivable Current Using a Thermoelectric Cooling Module

The analysis of the rolls cooling at push bench in rolling mill plant ŽP A.S.

Experimental Study of Temperature Influence on the Performance of PV/T Cell under Jordan Climate Conditions

Reusable device for cooling beverages and liquid foods: A novel approach to replace ice in glass

Determining the Influencing Factors on the Cooling of a 3D Printed Thermoforming Mould

Effect of ultrasonic vibration time on the molecular stacking structure and mechanical properties of the injection molding workpiece

Active solution heating and cooling in electrospinning enabling spinnability from various solvents

Composite adsorbent materials for desalination and cooling applications: A state of the art

A Technological System for Using Waste Warm Water from Energy Facilities for Effective Agriculture

Effect of magnetic field on the mixed convection in double lid‐driven porous cavities filled with micropolar nanofluids

Numerical Study of Residual Stresses Due to External Cooling in Extruded Polymer Profiles

Effect of the donor's age and type of extender (egg yolk versus clarified egg yolk) over the sperm quality of Majorera bucks preserved at 4°C: In vitro results and fertility trials

Influence of alumina ratio on reactions at the surface of alite crystals during cooling

Novel battery thermal management system with different shapes of pin fins

Characterization of short‐term storage of the semen of Trachelyopterus galeatus (Siluriformes: Auchenipteridae) incorporating dimethylsulphoxide (dmso) to the diluent

Multifunctional patch for use during laser procedures: Optimization and feasibility testing

Effect of different dental implant drilling template designs on heat generation during osteotomy – an in vitro study

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