Essays about: "värmeutveckling"

Showing result 1 - 5 of 7 essays containing the word värmeutveckling.

  1. 1. Alternative methods to prevent thermal cracking in concrete

    University essay from

    Author : Alexander Barchin; Navid Sedighi; [2019]
    Keywords : Massive concrete structures; heat development; cement hydration; temperature reduction; cracking; fly ash; ice; coarse aggregates; cooling methods; practical tests.; Massiva betongkonstruktioner; värmeutveckling; cementhydrataion; temperaturreducering; sprickbildning; flygaska; is; grov ballast; kylningsmetoder praktiska försök.;

    Abstract : In the construction industry, concrete is the most common material, because of its good properties such as compressive strength and endurance. Concrete is a composition of several different materials where one of the main components is cement. When the hydration process starts, large amount of heat is generated. READ MORE

  2. 2. Smart and flexible capacitor charger for warm environments

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Tobias Rydberg; [2016]
    Keywords : ;

    Abstract : A studio camera flash system being developed by Eascal AB needs a capacitorcharging power supply (CCPS) that can work in a hot environment withoutproblems and also not emit too much heat itself. The CCPS needs to be able tooperate from battery power as well as net power, so called off-line, and tocharge a capacitor to between 0-400 V. READ MORE

  3. 3. Modelling of battery cooling for Formula Student application : 3D Simulation of air cooled lithium-ion battery with COMSOL Multiphysics®, applied on 2016 years KTH Formula Student car “EV12e”

    University essay from KTH/Energiteknik

    Author : Alexander Erik Magnusson; [2016]
    Keywords : ;

    Abstract : Electric and hybrid cars is one of the technologies to reduce the uses of fossil fuel. What is common with an electric car and a hybrid car is the use of battery to store electrical energy. To sustain high performance, long lifetime and to keep high safety in an electric vehicle it’s very important to control the temperature of the battery cells. READ MORE

  4. 4. Djupströbäddar i fårproduktionen : dess egenskaper samt alternativa strömedel

    University essay from SLU/Dept. of Agricultural Research for Northern Sweden

    Author : Janina Nihlstrand; [2013]
    Keywords : får; djupströbädd; kompostering; strömedel;

    Abstract : I dagens svenska fårproduktion hålls de flesta djuren på djupströbäddar av halm under stallperioden. Att få till en väl fungerande djupströbädd som brinner kan ibland upplevas som en utmaning då den mikroorganiska aktiviteten som sker i bädden är en komplicerad process. READ MORE

  5. 5. Cosmic ray tracks in chondritic material with focus on silicate mineral inclusions in chromite

    University essay from Lunds universitet/Geologiska institutionen

    Author : My Riebe; [2012]
    Keywords : extraterrestrial chromite; cosmic rays; cosmic ray tracks; ordinary chondrites; Ordovician; kosmisk strålning; spår efter kosmisk strålning; extraterrestrisk kromit; ordinära kondriter; ordovicium; Earth and Environmental Sciences;

    Abstract : It has been suggested that the cosmic ray flux varies as Earth moves relative to the spiral arms in the galaxy. However, no satisfying record over the cosmic ray flux over long time scales has been presented. READ MORE