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Management of intermittent renewable energy sources (RES) such as wind and solar is a significant issue for countries with interconnected electricity markets. Increasing amounts of electricity from intermittent RES increases the variability of electricity supply, causing electricity prices to become highly sensitive weather conditions. Unpredictable prices have a negative effect on new infrastruct
Batterier möjliggör mer solel än elnätet tidigare klarat av En ökad andel solenergi i elnätet ställer nya tuffa krav på det befintliga nätet. I det här examensarbetet har möjligheten att undvika nätförstärkning genom att istället installera batterier på väl valda platser i nätet undersökts. Med hjälp av lösningen kan mer solel än nätet tidigare klarat av installeras. Historiskt sett har el produ
Den ökande andelen variabla förnybara energikällor i det svenska elsystemet har medfört ett växande behov av flexibilitet och balanstjänster. Batterienergilagringssystem betraktas som en nyckelteknik för att möta dessa behov, men deras ekonomiska lönsamhet är i hög grad beroende av marknadens utformning, geografisk placering samt vald operativ strategi. Syftet med detta examensarbete är att analys
Weakly coupled relaxors based on compositions (1-x) BaTiO 3 -xBiMeO 3 , where Me is a metal ion, have attracted attention as potential candidates for high-temperature high-energy density capacitors. However, the necessary Bi content is typically high with x = 0.3-0.4. In order to reduce problems associated with compatibility for base metal electrodes and due to additional problems due to Bi vol
Detta examensarbete ämnar att undersöka integration av tre olika teknologier till en havsbaserad vindkraftspark, om det är ekonomiskt gynnsamt samt hur kraftfluktuationerna till elnätet påverkas. Genom att kombinera olika förnybara kraftsystem kan man minska variabiliteten och kostnaderna kopplade till installation och drift av systemen. Även fast investeringar i annan förnybar energi utöver vindkThe high penetration of wind power is increasing the intermittency and power variability into the existing power grid. This is forcing industries to look for optimal configurations in order to improve their systems performance and minimize these effects from the power production method. Studies show that there are different ways of reducing the power variability and therefore stabilize the energy
Denna masteruppsats undersöker den snabbt växande europeiska marknaden för laddning av elbilar, med fokus på integrationen av batterienergilagringssystem vid laddningsstationer, särskilt för snabbladdning med likström. Genom intervjuer med branschintressenter och experter, samt en omfattande litteraturgenomgång, identifierar studien en eskalerande efterfrågan på batterisystemlösningar. Denna efterThe surge in electric vehicle (EV) popularity is reshaping the automotive landscape, steering us towards a greener energy future. However, this transformation is not without its hurdles. A significant challenge lies in developing efficient EV charging infrastructure. Faced with limited grid capacity and extended lead times for grid connections, the rapid expansion of this infrastructure demands in
Ett problem som uppstår med ökningen av förnybara energikällor är att det oregelbundna beteendet, hos framförallt sol och vindkraft, gör det svårt att styra produktionen utifrån efterfrågan på energi. En potentiell lösning på detta problem är att lagra energin i flytande luft. För att undersöka hur denna metod lämpar sig för energilagring har en modell av ett fristående energilagringssystem med flThe aim of this project was to create a model of the stand-alone LAES for use in future work at Siemens Industrial Turbomachinery (SIT). The model was created in IPSEpro with components developed from the software's standard library of power plant components. Required fluid properties were obtained from the Refprop DLL. This was accessed through the development of a DLL, functioning as a link
The true promise of MXene as a practical supercapacitor electrode hinges on the simultaneous advancement of its three-dimensional (3D) assembly and the engineering of its nanoscopic architecture, two critical factors for facilitating mass transport and enhancing an electrode’s charge-storage performance. Herein, we present a straightforward strategy to engineer robust 3D freestanding MXene (Ti3C2T
Circular economy has recently become a central part of European policy, bridging the environmental and economic policy domains closer than ever in an attempt to fulfil enhanced environmental ambitions. As economic operators seek to adopt innovative solutions, the issue of how established legal frameworks hamper or facilitate them becomes central. This thesis examines this point in relation to on
Packed beds with methane steam reforming reaction (MSR) can be used as thermochemical storage devices. The packing configuration can have a significant effect on the flow distribution which will further influence the heat/mass transfer, dispersion and reaction characteristics. In the present paper, the hydraulic, dispersion, heat/mass transfer and the MSR reaction properties are investigated in pa
As continuous access to energy is necessary for survival, the level of energy stores has a strong effect on fitness and survival. Behaviors by which energy stores are acquired and built up are known as foraging, and this is a very common topic in animal behavior studies. It is especially important for flying organisms to finely tune the level of energy reserves they carry. While most animals will
As the phase change material (PCM), pure paraffin wax is mixed with CuO (high heat conduction) and Span-80 (as a dispersant) in this research. The CuO/paraffin nanocomposite PCMs is synthesized with mass fractions of 0.3%, 0.6%, 0.9% and 1.2% by a two-step method. Dispersion stability and nanoparticle morphology of CuO/paraffin nanocomposite PCMs are analyzed by using a spectrophotometer and a sca
