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Energetika
Archiv článků od 24.7.2017 do 1.4.2019

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21.1.2019
doc. Ing. Milan Ostrý, Ph.D., FAST VUT v Brně, Ústav pozemního stavitelství

Paper deals with the definition of energy flexible building, its impact on the stability of the grid with the planned increasing share of energy from renewable sources and the possibility of using the heat storage capacity of building structures. Paper further analyzes the selected methodology for evaluation of the energy flexibible building and gives an example of thermally activated building structures.

18.9.2018
Věra Kubátová, skupina Energon

Unique charging station for electric vehicles was opened in february at the Prague Fair Grounds. The project combines recharging of electric vehicles with other functions: by producing their own energy using roof photovoltaics and by regulating overvoltage or undervoltage of the surrounding network using a battery system.

25.6.2018
prof. Ing. Josef Chybík, CSc., VUT Brno, Fakulta architektury

It is expected that the new administrative centre of Lesy České republiky would be an exemplary demonstration of the use of wood, which will be used in the form of the building material or in which the importance of wood will be emphasized in another appropriate way. The paper is focused on a proposal that won the international architectural competition in 2016.

4.6.2018
Bc. Jiří Vastl

The thesis is focused on smart metering system and ripple control. The first theoretical part describes function of ripple control. The second theoretical part presents smart metering technology with introduction of a new system of energy settlement. The new system of energy settlement use prices in the intraday market which are published on Electric grid operator’s website. The system can be considered as a dynamic tariff. The system of energy settlement is demonstrated on consumption of the family house. The comparison of both systems is demonstrated in the final part of the thesis.

28.5.2018
Bc. Jiří Vastl

The thesis is focused on smart metering system and ripple control. The first theoretical part describes function of ripple control. The second theoretical part presents smart metering technology with introduction of a new system of energy settlement. The new system of energy settlement use prices in the intraday market which are published on Electric grid operator’s website. The system can be considered as a dynamic tariff. The system of energy settlement is demonstrated on consumption of the family house. The comparison of both systems is demonstrated in the final part of the thesis.

21.5.2018
doc. Ing. Milan Gaff, Ph.D., Ing. Kamil Trgala, Ph.D., Ing. Tereza Adamová

Wood and the materials on its basis fulfil the requirements of an ever-evolving and accelerating society. In addition to naturally grown wood, wood-based materials are frequently used as a basic material for production of furniture and for building constructions as well. Looking at changes in waste management, a significant shift from the waste to the circular economy can be observed. The valuable raw materials are kept in the production cycle instead of landfilling or burning. Wood and wooden products can be efficiently separated in waste management, reused and recycled. The so-called wood waste – old furniture, wooden pallets, window and door frames, demolition wood, used lumber, bark and other wood residues can be reused in particleboard production. Particle board manufacturers in the Czech Republic have adopted progressive waste management and currently use 60% of recycled wood into particle boards. A completed life cycle analysis (LCA) of OSB demonstrates that replacing of 50% of natural fibres with recycled wood has significant environmental benefits. The objective is to push furthermore on effective legislation to promote waste material utilization and thus lead to a more sophisticated waste wood collecting.

14.5.2018
Ing. Jakub Maščuch, Ph.D., Ing. Petr Mydlil

When deciding on energy investments, consultants and designers often rely on data listed in the technical data sheets provided by manufacturers. This can lead to a very unpleasant surprise for operators - fuel consumption is often significantly higher than assumed by the assessment. Especially in terms of smaller heat sources, this approach leads to errors and consequent significant economic losses.

7.5.2018
Ing. Marek Patsch, PhD., Ing. Peter Ďurčanský, PhD.

The use of the Stirling engine and fuel cells in micro-cogeneration units is not yet very extensive, so the facilities of the University of Žilina have been in a long-term test run. This article aims to compare the gaseous emissions produced in the operation of the given micro-cogeneration units compared to conventional micro-CHP units and heat sources and, in particular, to popularize the equipment of such types among the broad professional public.

19.3.2018
Ing. Jiří Novotný, doc. Ing. Tomáš Matuška, Ph.D.

One of the most well-known and most important greenhouse gases is carbon dioxide (CO2), which arises from natural processes, but the burning of carbonaceous fuels, especially fossil fuels, contributes significantly in the last century. This text focuses on CO2 emissions associated with energy transformations for the supply of energy to buildings.

12.3.2018
Ing. František Hopan, Ph.D., Ing. Jiří Horák, Ph.D., Ing. Kamil Krpec, Ph.D., Ing. Petr Kubesa, Ing. Milan Dej, Ph.D., Ing. Jiří Ryšavý, Ing. Vendula Laciok, Ph.D., Jiří Kremer

The aim of this paper is to compare BaP emissions from domestic heating, industrial emissions of BaP and BaP emissions from transport within the scope of the Czech Republic and individual regions of the Czech Republic using current balance approaches that are used for reporting BaP emissions for the Czech Republic under the Convention on Long-range Transboundary Air Pollution (CLRTAP).

Brilon a.s.
19.2.2018
Ing. Karel Mrázek

In the area of existing thermal energy supply systems, the processes of disconnection of existing heat consumers have been ongoing for a long time. The key point is correctness of the Energy Certificates. The article provides an example of a specific assessment of disconnection from central source heat supplier.

22.1.2018
Ing. Václav Vodička, Ing. Zbyněk Zelený, Ing. Jakub Maščuch, Ph.D.

The paper presents a summary of achieved parameters of Wave – a cogeneration plant that received the E.ON Globe Energy Award in a category “Idea” in 2015. Operation experience and modifications of WAVE from the ceremonial baptism in 2016 to the end of November 2017 are described.

30.10.2017
Ing. Jiří Novotný, doc. Ing. Tomáš Matuška, Ph.D.

Assessing energy performance of the building is also done from the point of view of the need for non-renewable primary energy. A common layman probably does not know what this means. At the same time, the need for non-renewable primary energy fundamentally influences the design of energy sources for heating, cooling, hot water preparation, etc. for a particular building. The need for non-renewable primary energy is one of the three main energy performance indicators of a building, and if it is assessed as too large, the building can not be validated.

9.10.2017
Ing. Pavel Sláma

Another of several articles dealing with thermal losses evaluation of heating networks is focused on the numerical modeling of the temperature field in the immediate and distant surroundings of the pipe insulation surface. In connection with the difficulty of solving the analytical methods and in particular with the inaccuracy of their results, especially in less typical but not rare operating regimes, a two-dimensional model of the thermal field generated during the operation around the heating pipeline is offered as a suitable path for describing the whole process. The presented numerical model uses the growth of computational capacities in recent years, so that the size of one segment of the calculation grid is 10 x 10mm, which is, for example, to determine the suitability of the location of another pipe network or cable, near the hot-water pipe, the fineness is already sufficient. The resulting numerical model is being prepared, unlike a substantial part of the analytical methods, to calculate the full range of possible operating conditions of the hot-water and climatic conditions on the Earth's surface.

2.10.2017
Ing. Pavel Sláma

Another of several articles dealing with thermal losses evaluation of heating networks is focused on the numerical modeling of the temperature field in the immediate and distant surroundings of the pipe insulation surface. In connection with the difficulty of solving the analytical methods and in particular with the inaccuracy of their results, especially in less typical but not rare operating regimes, a two-dimensional model of the thermal field generated during the operation around the heating pipeline is offered as a suitable path for describing the whole process. The presented numerical model uses the growth of computational capacities in recent years, so that the size of one segment of the calculation grid is 10 × 10 mm, which is, for example, to determine the suitability of the location of another pipe network or cable, near the hot-water pipe, the fineness is already sufficient. The resulting numerical model is being prepared, unlike a substantial part of the analytical methods, to calculate the full range of possible operating conditions of the hot-water and climatic conditions on the Earth's surface.

14.8.2017
Ing. Pavel Sláma

The article deals with the measurement of temperature field around the underground pipeline and compared heat losses derived from the measured values, the values calculated by different methodologies and its content fits into a several-cycle of articles on the topic of heat transfer in the field of underground pipeline in terms of quantifying heat loss and the extent and the intensity of the thermal field generated in the vicinity of the pipeline network.

7.8.2017
Ing. Jan Skřínský, Ph.D.

Explosion parameters are currently published mainly for pure substances under standard laboratory conditions (20 °C and 101 kPa according to IUPAC). No values for the explosion characteristics of biomass and airborne gas mixtures are covered in the literature to cover non-standard conditions. In this paper, maximum explosion pressure, pmax, maximum explosion pressure rise rate (dp/dt)max, and deflagration index, KG, mixtures of hazardous chemicals from biomass gasification and measured at 25 °C, 45 °C, 90 ° C and 50 kPa, 75 kPa and 100 kPa.

24.7.2017
Ing. Pavel Sláma

The article deals with the measurement of temperature field around the underground pipeline and compared heat losses derived from the measured values, the values calculated by different methodologies and its content fits into a several-cycle of articles on the topic of heat transfer in the field of underground pipeline in terms of quantifying heat loss and the extent and the intensity of the thermal field generated in the vicinity of the pipeline network.


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