Lukáš Janota

Silva Tarouca Research Institute for Landscape and Ornamental Gardening

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Kamila Vávrová

Silva Tarouca Research Institute for Landscape and Ornamental Gardening

Jaroslav Knápek

Czech Technical University in Prague

Tomáš Králík

Czech Technical University in Prague

Jan Weger

Silva Tarouca Research Institute for Landscape and Ornamental Gardening

Karel Soukup

Czech Academy of Sciences, Institute of Chemical Process Fundamentals

Miroslav Vítek

Czech Technical University in Prague

MČ

Milan Čárský

VSB - Technical University of Ostrava

OŠ

Olga Šolcová

Czech Academy of Sciences, Institute of Chemical Process Fundamentals

D. Outrata

Silva Tarouca Research Institute for Landscape and Ornamental Gardening

Igissenov Assylbek

Czech Technical University in Prague

Cooperative Institutions

Czech Technical University in Prague

Czech Academy of Sciences, Institute of Chemical Process Fundamentals

Silva Tarouca Research Institute for Landscape and Ornamental Gardening

Czech University of Life Sciences Prague

VSB - Technical University of Ostrava

Dekonta (Czechia)

Institute of Technology and Business

Technical University of Košice

National Research Tomsk State University

Tomsk Polytechnic University

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Comprehensive Modeling and Evaluation of the Feasibility of the EU Energy Transition Concerning the Development of the Installed Capacity of Different Energy Sources Until 2050

Environmental science and engineering (2023)

Adam Kubín Lukáš Janota

Energy Security

Economic shortage

Energy system

Energy transition

10.1007/978-3-031-43559-1_30

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Citations (0)

Methodology for strengthening energy resilience with SMART solution approach of rural areas: Local production of alternative biomass fuel within renewable energy community

Energy Reports (2023)

Lukáš Janota Kamila Vávrová Rut Bízková

The article presents a proposal for a comprehensive methodology for the design of the process of local production of alternative energy fuel. The goal of the methodology is to ensure a local source of renewable fuel (biomass) for the needs of covering the supply of thermal energy to citizens in rural areas. In the first part, the methodology deals with the issue of sustainable cultivation of energy crops, namely short rotation coppice and its appropriate placement on soil blocks which are threatened by erosion or degraded by intensive agriculture. Subsequently, the local energy community independently produces alternative pellet biofuel, from the initial cultivation of young woody plants to the final production of ecological wood-based fuel with a calorific value of 16 MJ/ kg. The proposed innovative method of heat production leads to environmental benefits, energy savings, reduced payments for energy supply, and overall modernization of the technologies used.

Energy supply

Renewable resource

Resilience

10.1016/j.egyr.2023.07.057

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Citations (14)

Process Economy of Alternative Fuel Production from Sewage Sludge and Waste Celluloses Biomass

Energies (2023)

Kamila Vávrová Tomáš Králík Lukáš Janota Olga Šolcová Milan Čárský

The treatment and disposal of sewage sludge is one of the most important and critical problems of wastewater treatment plants. 8.7 million tonnes of dry matter of sewage sludge were produced annually in the European Union in the year 2020. Due to the fact that sewage sludge contains a large number of substances that are not beneficial for human health, the conditions for sludge management will be significantly tightened in the EU countries. One option for sludge liquidation is the production of biofuel in a form of granules or pellets from sewage sludge enriched by waste celluloses. The achieved results show that the resulting quality of such alternative biofuel is fully comparable to conventional fossil fuels. The economic analysis is based on the simulation of cash flows associated with the implementation of the project over the lifetime and the calculation of levelised cost (LCOE). Results shows (under the current economic situation) that solar dryer technology ensures the lowest LCOE at the level of 26 EUR/GJ in fuel. If the LCOE of the alternative biofuel includes the price of the saved emission allowance and the future costs of sewage sludge disposal, the resulting price is directly competitive with lignite. The results thus clearly show that there is an ecological and economically competitive substitute for solid fossil fuels, which may be an important step for the future use of local combustion sources such as district heating plants.

Sewage sludge

10.3390/en16010518

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Citations (6)

Second Life Batteries Used in Energy Storage for Frequency Containment Reserve Service

Energies (2020)

Lukáš Janota Tomáš Králík Jaroslav Knápek

The new Li-ion battery systems used in electric vehicles have an average capacity of 50 kWh and are expected to be discarded when they reach approximately 80% of their initial capacity, because they are considered to no longer be sufficient for traction purposes. Based on the official national future development scenarios and subsequent mathematical modeling of the number of electric vehicles (EVs), up to 400 GWh of storage capacity in discharged batteries will be available on the EU market by 2035. Therefore, since the batteries still have a considerable capacity after the end of their first life, they could be used in many stationary applications during their second life, such as support for renewables, flexibility, energy arbitrage, peak shaving, etc. Due to the high output power achieved in a short time, one of the most promising applications of these batteries are ancillary services. The study assesses the economic efficiency of the used batteries and presents several main scenarios depending on the likely future development of the interconnected EU regulatory energy market. The final results indicate that the best results of second-life batteries utilization lie in the provision of Frequency Containment Reserve Service, both from a technical and economic point of view. The internal rate of return fluctuates from 8% to 21% in the realistic scenario, and it supports the idea that such systems might be able to be in operation without any direct financial subsidies.

Peaking power plant

10.3390/en13236396

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Citations (26)

Biomass price as a key factor for the further development of biogas and biomethane use – Methodology and policy implications

Sustainable Energy Technologies and Assessments (2023)

Tomáš Králík Jaroslav Knápek Kamila Vávrová D. Outrata Martin Horák

Biogas

Energy crop

Biogas Production

10.1016/j.seta.2023.103492

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Citations (6)

SDEWES 2023: Barriers and Possibilities for the Development of Short-Rotation Coppice as an Agroforestry System for Adaptation to Climate Change in Central European Conditions

Energies (2024)

Jan Weger Kamila Vávrová Lukáš Janota Jaroslav Knápek

This article compares different production, economic, and selected environmental aspects of agroforestry systems in a standard (alley cropping) and a newly proposed design with fast-growing trees grown in short-rotation coppice. Our models of agroforestry systems (AFSs) are as follows: (i) alley cropping AFS with cherry and walnut trees in single rows (tree strips) with 28 m-wide arable fields between them (crop strips), and (ii) coppiced tree belt AFS with poplars and willows and 25 m-wide arable fields between them (crop strips). To evaluate the production characteristics of trees, we used yield curves from experimental plantations in conditions of the Czech Republic from previous research projects. Cost data were collected from long-term experimental plantations and combined with current operation and energy prices. The article presents an economic methodology for assessing the competitiveness of biomass production in AFSs under the current identified market conditions. Our results show that AFSs with short-rotation coppice can have similar economic and production results as annual crops if grown on suitable sites and with appropriate quality of agronomy. In comparison, alley cropping AFSs with fruit trees would not be economically viable for farmers without a significant subsidy for establishment and maintenance in the first years after establishment. Concerning the latest economic and political developments, the product from SRC (energy woodchips) can be evaluated as strategic, increasing the producer’s independence from purchased energy fuels.

Short rotation coppice

Climate Change Adaptation

Short rotation forestry

10.3390/en17081779

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Citations (1)

Complex methodology for optimizing local energy supply and overall resilience of rural areas: A case study of Agrovoltaic system with Miscanthus x giganteus plantation within the energy community in the Czech Republic

Renewable Energy (2023)

Lukáš Janota Kamila Vávrová Jan Weger Jaroslav Knápek Tomáš Králík

Energy crop

Adaptability

Resilience

Consumption

10.1016/j.renene.2023.05.077

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Citations (7)

Evaluation of the Economic Competitiveness of Energy Biomass Cultivation According to the EU Climate and Energy Goals Under the Current Energy Market Conditions

Lukáš Janota Kamila Vávrová Jaroslav Knápek Jan Weger

This article presents the general methodology to assess the dynamic potential of biomass and an approach to a holistic assessment of the economic competitiveness of purpose-grown biomass. The methodology identifies all the key parameters and uncertainties that will affect the volume of biomass available in the EU in the future. These parameters have a direct impact on the future available energy potential of biomass and on its market-competitive production price, both in terms of substitution for conventional fuels and in terms of competition with conventionally grown agricultural crops. The methodology is demonstrated on a model case of the Czech Republic based on long-term experimental biomass stands (Miscanthus x giganteus, Schavnat, and Reed canary grass). Ten different scenarios were investigated to determine the competitive potential of biomass with different land allocation strategies for perennial energy crops and the maximum acceptable biomass production prices. The total energy potential of biomass from agriculture land ranges from 72.4 to 96.6 PJ/year. The most significant identified impact on the economic competitiveness of energy crops may be their high costs for plantation establishment. The case study for the Czech Republic also discusses the impact of the bark beetle calamity on biomass availability.

Energy market

Energy current

10.2139/ssrn.4712075

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Citations (0)

Techno-Economic Analysis of Fluidized Bed Combustion of a Mixed Fuel from Sewage and Paper Mill Sludge

Energies (2022)

Milan Čárský Olga Šolcová Karel Soukup Tomáš Králík Kamila Vávrová

The treatment and disposal of sewage sludge is one of the most important and critical issues of wastewater treatment plants. One option for sludge liquidation is the production of fuel in the form of pellets from mixed sewage and paper mill sludge. This study presents the results of the combustion of pelletized fuels, namely sewage and paper mill sludge, and their 2:1 and 4:1 blends in a fluidized bed combustor. The flue gas was analysed after reaching a steady state at bed temperatures of 700–800 °C. Commonly used flue gas cleaning is still necessary, especially for SO2; therefore, it is worth mentioning that the addition of paper mill sludge reduced the mercury concentration in the flue gas to limits acceptable in most EU countries. The analysis of ash after combustion showed that magnesium, potassium, calcium, chromium, copper, zinc, arsenic, and lead remained mostly in the ash after combustion, while all cadmium from all fuels used was transferred into the flue gas together with a substantial part of chlorine and mercury. The pellets containing both sewage and paper mill sludge can be used as an environmentally friendly alternative fuel for fluidised bed combustion. The levelized cost of this alternative fuel is at the same current price level as lignite.

Sewage sludge

Paper mill

Fluidized bed combustion

10.3390/en15238964

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Citations (3)

Comprehensive evaluation of the planned development of intermittent renewable sources within the EU

Energy Reports (2022)

Lukáš Janota Alena Surovezhko Igissenov Assylbek

This paper deals with an assessment of the steps taken and planned by the EU (European Union) to achieve its climate neutrality by 2050. Emphasis is placed on the reality of achieving RES (renewable energy sources) in total energy production in individual countries according to the required values for 2030. A detailed analysis of the previously set goals of penetration of RES and their historical fulfillment was performed. Furthermore, an evaluation of the planned shutdown of traditional combustion sources and the overall loss of constant production power, which keeps the energy system stable with a sufficient amount of standby power in real time is performed. In connection with these facts of the EU plans of the shift away from coal power plants and the nature of the intermittent electricity generation of the used renewable sources within the EU and the historical dynamics of the RES production capacities installation are evaluated.

10.1016/j.egyr.2022.01.093

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Citations (13)