Sökning: "poröst medium"
Visar resultat 1 - 5 av 8 uppsatser innehållade orden poröst medium.
1. Experiments and simulations of gas flow through a NiCd battery
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : This report describes the thesis work carried out regarding experiments and simulations of the gas flow through a NiCd battery. The objective of the work was to investigate how different geometries of the flip top vent on the battery and the level of porosity of the flame arresting disc impacted the amount of potassium carbonate created at the outlet of the vent. LÄS MER
2. Numerical modeling of airflow on the cathode-side of a bipolar flow plate : How the formed geometry affects the pressure drop and flow distribution in a hydrogen fuel cell
Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)Sammanfattning : Climate change and rising temperatures is a well-known problem. To tackle global warming a transition from fossil fuels to renewable and reliable energy sources is necessary. Hydrogen, in fuel cells, is proposed to replace diesel and gasoline in the transport sector. LÄS MER
3. Numerical Modelling of a Packed Bed Thermal Energy Storage for Applications in a Carnot Battery : KTH Thesis Report
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : This thesis explores the heat transfer characteristics of a packed bed thermal energy storage device through the development of a 3D model in COMSOL Multiphysics. The model is based on a laboratory-scale device consisting of an aluminum box filled with sand, which acts as the thermal storage medium. LÄS MER
4. Unspecific interactions in different batch variations of agarose based base matrices at different NaCl concentrations.
Master-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)Sammanfattning : Size exclusion chromatography (SEC) separates molecules based on their actual size rather than their molecular weight. This indicates that the smaller a molecule is, the longer it will be held in the column since it can penetrate the pores more effectively than a bigger molecule, resulting in a longer retention time, whereas the larger molecule has a shorter retention time. LÄS MER
5. Finita differens-metoder för reservoarsimulering
Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)Sammanfattning : Tillförlitliga beräkningsverktyg är generellt av stor betydelse för att förstå processerna i världen omkring oss, och i synnerhet är simulering av flöden i reservoarer viktigt för att kunna bemöta vår tids stora krav. Exempelvis är stabil grundvattenförsörjning, hållbar utvinning av olja, och säker förvaring av kärnavfall beroende av reservoarsimuleringar. LÄS MER