Dominik Keiner

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• Master of Science
• Researcher at Lappeenranta – Lahti University of Technology LUT

Carbon dioxide removal (CDR) is essential to achieve ambitious climate goals limiting global warming to less than 1.5°C, and likely for achieving the 1.5°C target. This study addresses the need for diverse CDR portfolios and introduces the LUT-CDR tool, which assesses CDR technology portfolios aligned with hypothetical societal preferences. Six sce...

This study evaluates the environmental performance of advanced solar photovoltaic technologies, including floating, bifacial ground-mounted, and building-integrated photovoltaics systems, compared to conventional technologies in Finland, Germany and Spain from 2022 to 2050. A novel aspect of this research is the integration of multiple photovoltaic...

Solar photovoltaics, especially rooftop systems also called distributed solar photovoltaics, are crucial in the ongoing energy transition. Modelling these systems is vital to understanding their role in a decentralised energy system. While ground-mounted photovoltaic power plants are easier to model, generalising yield profiles for rooftop systems...

As research in 100% renewable energy systems progresses, closing remaining research gaps, such as quantifying inter-annual balancing requirements, is necessary. For this study, inter-annual variations of wind power yield and the resulting balancing requirements are analysed for the energy transition towards 100% renewable energy of the United Kingd...

Energy transition on small islands is limited by the scarce availability of land, restricting large-scale implementation of onshore renewable energy technologies such as solar photovoltaics and wind power. Ocean energy technologies provide novel opportunities for land-constrained islands to achieve 100% renewable energy systems. While wave power is...

Estimation of rooftop solar PV yield based on fixed-tilted ground-mounted power plants for global energy system transition modelling including rooftop PV and/or prosumers.

AbstractA rapid defossilisation of the industry sector is required to stop further greenhouse gas emissions and to curb global warming. Additionally, to avoid irreversible consequences caused by climate change, the deployment of negative emission technologies is required to reduce the carbon dioxide (CO2) concentration in Earth’s atmosphere to a su...

Optimisation of horizontal single-axis tracking solar photovoltaic power plants is important for its optimal application. Commonly, standard backtracking has been applied to avoid mutual shading and improve the full load hours and levelised cost of electricity; however, this approach is not always the best solution for state-of-the-art modules with...

The fight against global warming requires novel approaches for the defossilisation of industrial processes, and the limitation of global warming requires options for negative carbon dioxide (CO2) emissions. The production of carbon fibre (CF) is an energy-intensive chain of processes which cause CO2 emissions. Having in mind the high market growth...

While a rapid defossilisation of the energy system is the highest priority, additional post-fossil CDR for net-negative emissions will be necessary. Routes for mineralisation ( in situ -, ex situ mineralisation, enhanced rock weathering) are examined.

Climate change-driven temperature rise in the Arctic has been shown to increase faster than on global average, heavily affecting Greenland's environment. Greenland's energy system is very vulnerable to oil prices, as it relies on imported oil. Rich wind resources complementary with solar resources may enable a transition to a sustainable and self-s...

This paper aims to introduce and investigate the role of a wider array of solar PV technologies on the transition of a fully sector-coupled Iberian energy system towards 100% renewable energy (RE) by 2050. The approach used in this research consists of the following: i) reviewing existing highly RE system studies on Spain and Portugal and the respe...

Appropriate climate change mitigation requires solutions for all actors of the energy system. The residential sector is a major part of the energy system and solutions for the implementation of a seasonal hydrogen storage system in residential houses has been increasingly discussed. A global analysis of prosumer systems including seasonal hydrogen...

The Intergovernmental Panel on Climate Change concludes that climate change has already caused substantial damages at the current 1.2°C of global warming and that warming of 1.5°C would elevate risks of a wide-range of climate tipping points. For example, wet-bulb temperatures are already exceeding safe levels, and the melting of the Greenland and...

Following current trends, the global chemical industry is set to become the largest consumer of fossil fuels. Among energy intensive industries, the chemical industry is one of the most challenging...

Energy systems research requires a variety of demand scenarios for possible futures. Comprehensive energy demand modelling is often made with a simplified approach or based on assumptions scattered among various sources, if it is published at all. There is no detailed discussion of the impact of various macro-economic scenarios on different levels...

Low-lying coastal areas and archipelago countries are particularly threatened by the impacts of climate change. Concurrently, many island states still rely on extensive use of imported fossil fuels, above all diesel for electricity generation, in addition to hydrocarbon-based fuels to supply aviation and marine transportation. Land area is usually...

Research on 100% renewable energy systems is a relatively recent phenomenon. It was initiated in the mid-1970s, catalyzed by skyrocketing oil prices. Since the mid-2000s, it has quickly evolved into a prominent research field encompassing an expansive and growing number of research groups and organizations across the world. The main conclusion of m...

Solar photovoltaics has demonstrated the strongest long-term growth rates of all energy technologies since the 1950s. It has been recognized as the new “king” of energy markets, having emerged within the past few years as the least-cost source of electricity. Along with supporting energy system technologies, in particular batteries and electrolyzer...

Globally, the heat sector has a major share in energy consumption and carbon emission footprint. To provide reliable mitigation options for space heating, domestic hot water, industrial process heat and biomass for cooking for the energy transition time frame up to the year 2050, energy system modeling relies on a comprehensive and detailed heat de...

Supplementary material

Alkaline electrolysis is a mature technology with long lifetimes and high reliability. However, the conventional electroylzer systems are only designed for constant operation at full load. Depending on the employed rectifiers, they show reduced efficiencies in dynamic operation. Recent advances in rectifier and electrolysis systems allow their dyna...

In dieser Forschungsarbeit werden verschiedene Modelle für elektrische und thermische Systemkomponenten eines Einfamilienhauses entwickelt und angepasst, um das energetische Verhalten von Gebäuden verschiedener Gebäudeklassen nachzubilden. Mit dem Einsatz von Wärmepumpen bei verschiedenen Betriebsstrategien soll die Auswirkung der verschiedenen Str...

Coupling of energy sectors within the emerging residential PV prosumer systems is necessary for an optimised use of the houseowners' produced electricity. But the pure availability of different energy technologies in the system is not enough. The optimising of electricity usage as well as the capacities of PV generators, storage technologies, heat...

Globally, PV prosumers account for a significant share of the total installed solar PV capacity, which is a growing trend with ever-increasing retail electricity prices. Further propelled by performance improvements of solar PV and innovations that allow for greater consumer choice, with additional benefits such as cost reductions and availability...

Neo-Carbon Energy is the largest renewable energy research in the Finnish history. We are creating a completely new energy system where the produced energy is emission-free, cost-effective and independent. We are solving renewable energy’s flexible use, storage and distribution. This will revolutionise the entire energy field. The project is carrie...

PV prosumers may be one of the most important market segments in the energy transition. By using one's own energy on the spot of production, PV prosumers have a significant possibility of supplying their own demands with cheap and pollution-free energy. This becomes most profitable by maximising self-consumption while avoiding large amounts of exce...

Globally, PV prosumers account for a significant share of global solar PV capacity and a continuing trend with ever increasing retail electricity rates, as well as performance improvements of solar PV and innovations that allow for greater consumer choice, with additional benefits such as cost reductions and availability of incentives. This paper p...