Search results

Cleantech—technologies with a reduced environmental impact—has emerged as an important set of solutions for addressing pollution and its impacts in China. The goal of this study is to map out wherein Chinese actors with first-hand knowledge of cleantech investments think the largest domestic investment opportunities are found, understand the underlying reasons, and then evaluate how consistently t

Living in a world, where constantly growing energy consumption and climate change are issues of increasing concern, it is necessary to decrease fossil fuel consumption and promote more sustainable ways of gaining energy, such as renewables (IPCC, 2007). Poland as a member of the European Union was obliged to comply with European policies and increase its share of renewable energy by 2020. However,

Renewable energy is the keyword for energy industry sector in the world today. Solar energy has a huge potential, able to fulfill increasing energy demand and growing its share of energy sector. Republic of Ireland has one of the lowest solar energy deployment rates in Europe, although climatic conditions have been proved to be acceptable. The purpose of this study was to assess potential sites fo

Single-family houses (SFHs) constructed between 1961 and 1980 account for approximately one-third of the total energy use, 31 TWh, for space heating and domestic hot water in Swedish SFHs. These are responsible for about 40 percent of the total energy use in all buildings. There are roughly 715,000 houses from this period and they are largely homogeneous in technical terms, with low levels of ther

Electronic dynamics takes place on the attosecond timescale and can thus only be studied using a tool with attosecond temporal resolution. High harmonic generation (HHG) provides coherent attosecond pulses in the extreme ultraviolet spectral region. The work presented in this thesis focuses on generating and characterizing ultrashort femtosecond pulses and using them for HHG, together with a gatin

Mg-10 mol% LiBH4 composite plus small amounts of FeF3 is investigated in the present work. The presence of LiBH4 during the milling process noticeably modifies the size and morphology of the Mg agglomerates, leading to faster hydrogenation and reaching almost the theoretical hydrogen capacity owing to enhanced hydrogen diffusion mechanism. However, the dehydrogenation of the system at low temperat

Med 2024 officiellt uppmätt som det varmaste året hitills är klimatförändringarna och behovet av att minska utsläppen är mer aktuella än någonsin. Sveriges viktigaste uppgift i denna utmaning är att effektivt elektrifiera sina två största källor till koldioxidutsläpp: industrin och transportsektorn. Dessa två sektorer står tillsammans för hela 65 % av landets utsläpp. Elektrifieringen förväntas leThere is an urgent need to reduce CO2 emissions in Sweden, primarily caused by industry and the transport sector, which together accounted for nearly 65% of the country's total CO2 emissions in 2023. A key solution to this challenge is the rapid and effective implementation of green electrification, which involves transitioning industry and transportation to electricity and electricity-based f

Mining is an economically-beneficial activity recognized as crucial in modern society since almost every aspect of our lives relies on minerals. However, intensive mining activities impose a severe strain on the water-energy nexus. In fact, mining ventures: i) need massive amount of water in various ore processing steps; ii) generate a huge amount of waste (tailings), generally transferred to tail

Fjärrvärme och fjärrkyla är ändamålsenliga system för distribution av värme och kyla i tätbebyggda områden. Dessa system är viktiga vid planeringen av framtida energieffektiva system på grund av deras höga potential för att integrera förnybara energikällor. Systemen spelar också en viktig roll i samhällets energiförsörjningssäkerhet, vilket gör dem till ett tvärvetenskapligt forskningsområde. Den District heating and cooling are efficient systems for distributing heat and cold in urban areas. They are a key solution for planning future urban energy-efficient systems due to their high potential for integrating renewable energy sources. The systems also play an important role in community resilience, which makes them a multidisciplinary research topic. The continuous development of these sys

Vätgas är en energibärare som kan ha en roll i fossilfria energisystem. I det här examensarbetet undersöktes därför den praktiskt genomförbara potentialen för förnybar vätgas att göra nytta i Skånes energisystem inom tidsramen till 2030. Detta analyserades genom en undersökning av de tekniska och regionala förutsättningarna för förnybar vätgas, en intervjustudie med sju skånska vätgasaktörer, samt

Photoperiod, the relative duration of daylight in a 24-hour diel-cycle, is an environmental cue that influences physiological processes in birds, regulating life-history events such as reproduction and migration. Here we study whether variations in photoperiod affect migratory behaviors, including activity, orientation, and body mass, across bird species during 2023 spring and autumn migration. Ou