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Price of electricity from biomass
Štěpánek, Petr ; Moskalík, Jiří (referee) ; Lisý, Martin (advisor)
The introduction of the work addresses the definition, creation and distribution of biomass. Below there are the different ways of processing of biomass technology. The third part focuses on the legislative regulation of electricity generation from biomass and the subsidy policy of the state in energy production from biomass. The final section applies the specific use of biomass for heating in city Třebíč.
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Separation of solid particles from biomass burning
Štěpánek, Petr ; Baláš, Marek (referee) ; Pospíšil, Jiří (advisor)
This thesis deals with aspects of the dust particles which occur in gaseous products from biomass combustion. The thesis introduces technologies by which solid particles capture from a combustion flow can be implemented. Principles and technical means of dust particles separation in mechanical separators are put in focus primarily. The thesis is concluded with a technical design of a cyclone separator.
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Proposal for Business Model of New Company
Štěpánek, Pavel ; Chlebovský, Vít (referee) ; Zich, Robert (advisor)
The diploma thesis focuses on the issue of a proposal for the development of the business model of the start-up company with the aim to create an online literary service. In the diploma thesis, theoretical starting points of necessary areas for the successful elaboration of the theme will be defined. In the analytical part, attention will be paid to the individual areas of the business model and related areas including delimitation and verification of the idea of the service. Based on the carried out analyses and research, the proposal part will elaborate the proposal for the development of the business model of the start-up company including an evaluation of strengths and weaknesses of the proposal for the development of the model and recommended steps for the subsequent elaboration.
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Methodology for rapid, comprehensive, independent decision-making on the need, effectiveness and interaction of adaptation measures in river basins under climate change
Fischer, Milan ; Zeman, Evžen ; Vizina, A. ; Hanel, M. ; Bernsteinová, Jana ; Tachecí, P. ; Štěpánek, Petr ; Pavlík, P. ; Máca, P. ; Ghisi, Tomáš ; Rapantová, N. ; Bláhová, Monika ; Janál, P. ; Trnka, Miroslav
The aim of the methodology is to present methods for quantifying the impacts of projected climate change on the water balance when applying adaptation measures in the Czech Republic for the next few decades. Adaptation measures should contribute to the sustainability of the water balance in all major user segments of water use and management in the basin. The main principle is the use of hydrological models to transform climate change scenarios into time series of hydrological conditions and to quantify the overall water balance of the basin using different types of adaptation measures and their implementation over time. Special emphasis is placed on the evaluation of combinations of adaptation measures that cannot be analysed by simplified methods. The methodology is designed to search for the optimal combination of adaptation measures in the assessed catchment. The proposed approach eliminates the shortcomings of effectiveness assessment from the perspective of the exclusive user of the water resource, as the evaluation of the effectiveness of adaptation measures is carried out in the form of a multi-criteria analysis of the evaluation of the outputs of the simulation model for predicting the water balance in the whole basin. This methodology can be used to assess different adaptation measures in all basic segments of water users: agriculture, forestry, energy, water management and others.
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Methodology for determining the main disturbances in the water management balance and optimizing adaptation measures in the conditions climate change
Fischer, Milan ; Zeman, Evžen ; Vizina, A. ; Hanel, M. ; Bernsteinová, Jana ; Tachecí, P. ; Štěpánek, Petr ; Pavlík, P. ; Máca, P. ; Ghisi, Tomáš ; Rapantová, N. ; Bláhová, Monika ; Janál, P. ; Trnka, Miroslav
Ongoing climate change is causing a global increase in air temperature. While this is leading to an acceleration of the global hydrological cycle, and therefore a global increase in precipitation, the spatiotemporal variability in precipitation is much more complicated. While temperature in the Czech Republic shows a consistently increasing trend similar to that of surrounding countries and the planet as a whole, precipitation can be simplified that long-term averages of annual totals remain and are likely to remain very similar in the coming decades. Rising air temperatures inherently bring increased evaporative demand of the atmosphere and, for the same precipitation, a lower ratio of precipitation to evaporation, i.e. the climatic water balance shows a negative trend.
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Stochastic Weather Generators and Regional Climate Models: Rivals or Allies?
Dubrovský, Martin ; Štěpánek, Petr ; Meitner, Jan ; Zahradníček, Pavel
The paper demonstrates 'collaboration' between the stochastic weather generator SPAGETTA (WG) and Regional Climate Models (RCM) in analysing impacts of Climate Change (CC). In the first part of the paper, the generator is compared with the ensemble of 19 RCMs in terms of their ability to reproduce 11 spatial temperature and precipitation indices in eight European regions: the indices are based on registering days and spells exhibiting spatially significant occurrence of dry, wet, hot or cold weather, or possible combination of dryor-wet and hot-or-cold conditions. The obtained results indicate that both methodologies provide weather series of comparable quality. In the second part of the paper (which was done only for the Central Europe region), the WG parameters are modified using the RCM-based CC scenarios and the synthetic weather series representing the future climate are produced. This experiment is based on a set of CC scenarios, which consist of changes in selected combinations of following characteristics: (1) mean temperature, (2) temperature variability, (3) daily average precipitation (considering only wet days), (4) probability of wet day occurrence, (5) spatial lag-0 and lag-1day correlations of temperature and precipitation series. The synthetic series generated for each version of the CC scenario are analysed in terms the above mentioned spatial validation indices, the stress was put on effect of each of the five component of the CC scenario on individual validation indices. The results of the experiment indicate that the changes in temperature means is the main contributor to the changes in the validation obviously, except for the purely precipitation-based indices. Positive changes in the lag-0 and lag-1day correlations of both temperature and precipitation are the second most significant contributor to the changes in the validation indices.
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Use of the Agrorisk.cz portal – an early warning system against the negative effects of weather on agriculture
Žalud, Zdeněk ; Svobodová, Eva ; Klem, Karel ; Hlavinka, Petr ; Semerádová, Daniela ; Zahradníček, Pavel ; Štěpánek, Petr ; Bláhová, Monika ; Kudláčková, Lucie ; Balek, Jan
The early warning system against negative weather effects offers a daily updated description of abiotic and selected biotic risks threatening field production at the cadastral level. It includes their 9-day forecast. The methodology is primarily intended for agronomists,plant doctors and agricultural managers, as well as scientists, agricultural consultants and representatives of public administration.
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Comparison of the efficiency of different sets of lines for post-harvest treatment of cereals with regard to their energy intensity
ŠTĚPÁNEK, Petr
The current energy crisis is having a significant impact on many industries around the world, and it is also significant in the Czech Republic. Apart from agriculture, the food industry, which is directly linked to agriculture, is also affected. The aim of this theses is to compare the efficiency and energy consumption of the post-harvest treatment process of spring barely, Bente variety. To compare the harvested and subsequently clean and properly postharvest treated barley grain, two different post-harvest lines equipped with a screen or aspiration grain cleaner were used. The grain was sampled in both cases in August 2022 and assessed for moisture, bulk density, HTZ, impurities and impurities. For the post-harvest lines, the energy requirements of grain cleaning was then calculated. The screen grain cleaner is more suitable for the removal of hea-vier components of the grain mass such as fractions. The aspiration grain cleaner is more suitable for the removal of lighter admixtures and impurities and its use is less energy intensive.
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