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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
Exercises 1. Attosecond pulse trains (a) We consider odd harmonics of a fundamental laser field at 800 nm between 21 and 37 and assume that they are in phase at , and that they have the same amplitude. Calculate the temporal intensity resulting from the superposition of the harmonic, and estimate the duration of the individual pulses. Note: The duration of a pulse with the form is given approximat
https://www.nrcf.lu.se/sites/nrcf.lu.se/files/2025-01/Solution%20exercises.docx - 2026-06-06
The European Spallation Source (ESS) is a neutron-scattering facility funded and supported in collaboration with 17 European countries in Lund, Sweden. Cryogenic cooling at ESS is vital particularly for the linear accelerator, the hydrogen target moderators, a test stand for cryomodules, the neutron instruments and their sample environments. The paper will focus on specific process design criteria
Sverige har som mål att, år 2040, ha ett helt förnybart elsystem. Idag utgör solceller ungefär 0.2 procent av den totala elproduktionen, men deras marknadsandel ökar hastigt, och antas ha potentialen att leverera 5-10 procent av elproduktionen år 2040. Till följd av den växande solcellsmarknaden har även energilagring, i form av batteri, blivit allt intressantare eftersom man med batterier kan ökaSweden aims to have a completely renewable electricity system by 2040. Today, photovoltaics (PV) account for about 0.2 percent of total electricity production but are estimated to have a potential to deliver between 5 and 10 percent of total electricity production in 2040. The expansion of the PV market share has already started and is increasing rapidly. Because of the growing PV market, energy s
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
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
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
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
Jubilee Honorary Doctor at the Faculty of Law2019U.S. Supreme Court Justice Ruth Bader Ginsburg, USAHonorary Doctors at the Faculty of Law2025Professor Jeremias Adams-Prassl, University of Oxford, UKProfessor Marta Pertegás Sender, University of Maastricht, The Netherlands2024Professor David Lagnado, University College London2023Professor Helle Krunke, Copenhagen University, DenmarkLawyer Erik Sjö
https://www.law.lu.se/external-engagement/honorary-doctorates - 2026-06-05
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
Hybrid energy systems have become a promising strategy for enhancing power utilization efficiency while preserving ecology. Previous research has predominantly focused on developing models with fixed ecological constraints. However, the fixed ecological constraints overlook dynamic ecological uncertainty and its interaction with operation decisions. This study proposes adaptive operating rules for
Cassava is the third-most important food source in the tropics after rice and maize. Cassava is the staple food for about half a billion people in the World. It is a tropical crop grown mainly in Africa, Asia, and South America. It can be cultivated on arid and semiarid land where other crops do not thrive. During the processing of cassava into chips, flour or starch, enormous amount of wastes are
Handling gas cylinders in the laboratoryGas cylinders containing flammable gases must not be stored in the laboratory. However, there is an exception for gas cylinders with a maximum capacity of 10 liters, which can be used temporarily during a specific day but never to be left overnight or weekends.Pay attention to the EX-zone: Ensure that no electrical devices are present in the EX-zone, except
https://www.kc.lu.se/en/employee/general-safety-regulations/5-general-rules-work-chemicals/53-flammable-gases - 2026-06-05
Organic semiconducting polymers exhibited promising photocatalytic behavior for hydrogen (H2) evolution, especially when prepared in the form of polymer dots (Pdots). However, the Pdot structures were formed using common nonconjugated amphiphilic polymers, which have a negative effect on charge transfer between photocatalysts and reactants and are unable to participate in the photocatalytic reacti
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
