Archiv článků od 12.9.2016 do 8.5.2017

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Working with stakeholders of urban construction projects: inform, listen and plan together

8.5.2017 | Mgr. Martina Bacúrová, Mrg. Tomáš Vácha, Univerzitní centrum energeticky efektivních budov, ČVUT v Praze
The article describe the communication and cooperation of urban projects stakeholders. Inadequate communication can raise conflicts which could obstruct project realization.

The invention, patent or utility model - who should sort?

8.3.2017 | Ing. Zdeněk Lyčka
The article explains the differences between the invention patents and utility model from the perspective of Czech legislation. Also highlights the confusion individual categories and purposeful fraud by producers and sellers of equipment.
1 comment, 08.03.2017 07:44

Research gasification technology with autothermal generator

6.3.2017 | Ing. Václav Peer, Ing. Pavel Friedel, Ing. Jan Skřínský, Ph.D., Ing. Ján Vereš, Ph.D., VŠB – TU Ostrava, Výzkumné energetické centrum
The article introduces a brief history of gasification and gasification equipment located at the premises of Energy Research Center at VSB - Technical University of Ostrava. Gasification at the Energy Research Center has a ten-year tradition. The beginnings date back to 2006, when cooperation was initiated with the Ostrava company TEMEX, spol. s.r.o. by the construction of the first version of the gasifier with autothermal generator.

Summary Evaluation of fuel and energy consumption in Czech households by 2015

6.3.2017 | Ing. Vladimír Stupavský, redakce
Czech Statistical Office published in the February 2017 data from a large sample survey in Czech households with an Energy 2015. This survey was focused mainly on the consumption structure and methods of use of particular fuels and energy. The data focus on historical comparisons and consumption trends from 1991 to 2015. The statistics include methods of thermal insulation of housing, fuel used for heating and hot water, the average consumption of Czech households, types of heating sources, etc.
2 comments, last 11.04.2017 14:25

Measurement and Evaluation of the Significant Sources of Natural Radioactivity

6.3.2017 | prof. Ing. Leonard Hobst , CSc., VUT v Brně
The natural radioactivity lives mankind throughout its development. The effects of radiation to some extent they can influence the evolutionary history of life on Earth. It is therefore important to determine what values the natural radioactivity would reach different locations of the world.

Model predictive control as a tool for ensuring and reduction of negotiated heat output

6.3.2017 | Ing. Jiří Cigler, Ph.D., Feramat Cybernetics s.r.o., Ing. Petr Kudera, Energocentrum Plus s.r.o.
Total cost of heating energy typically consists of two items. The former is the payment for consumed energy while the latter is the payment for reserved power capacity or reserved energy capacity in given period. If the customer pays for the reserved power capacity, he/she should address two questions: what is the most suitable level of reserved capacity and how to control the heating system so that the reserved capacity limits are not exceeded. Both questions can be readily solved with the aid of model based predictive controller.
6 comments, last 09.03.2017 09:32

Primary energy savings and CO2 savings by using biomass microCHP plant

20.2.2017 | Ing. Jakub Maščuch, Ph.D., Ing. Petr Mydlil, ČVUT UCEEB
Paper describes selected effects of implementation of biomass microCHP generation in Czech legal conditions. Selected demonstration of biomass CHP is described and basic operational energy balances are presented. Comparison of microCHP and ordinary biomass boiler energy balance were performed. MicroCHP technology WAVE, which is being developed at CTU UCEEB in Buštěhrad, is described. Operational parameters of WAVE and future development outline were discussed.
16 comments, last 27.02.2017 11:18

Thermal energy prices and their development to year 2016

9.2.2017 | Ing. Josef Hodboď, redakce
ERU has compiled the inventory of actual prices of thermal energy for holders of licenses for the production and distribution of thermal energy on 31. 12. 2015 and prior to the year 2016. The office added it to historical data since 2006, so it contains last ten years.
3 comments, last 16.02.2017 15:06

Conditions of direct sales of self-produced electricity

23.1.2017 | Mgr. Mikuláš Vargic, Doucha Šikola advokáti s.r.o.
In relation to the decentralized electricity production development, the issue whether it is possible to sell generated electricity directly to users of apartments in residental buildings, offices or other areas without using the distribution grid, is on the agenda.
2 comments, last 10.02.2017 11:42

Reliability assessment of corrosion-weakened tanks

2.1.2017 | doc. Ing. Vít Křivý, Ph.D., Ing. Monika Kubzová, Vysoká škola báňská – Technická univerzita Ostrava, Fakulta stavební
The paper introduces selected parts of the methodology for the technical state evaluation of the steel cylindrical tanks affected by the corrosion weakening. Technical conditions have been mainly worked out for the energetic company experts who are responsible for the realization and evaluation of the steel tanks diagnostics. Simplified analytical procedures have been developed to evaluate the influence of the measured corrosion weakening on the reliability of steel tank structures. The technical conditions serve mainly for a decision about the relevance of the corrosion damage: the corrosion weakening is insignificant with respect to the structural reliability or the corrosion failures are potentially dangerous with respect to the structural reliability and a detailed statistical assessment of the steel tank is necessary.
1 comment, 07.01.2017 15:43

Invalid control of boilers - how to spot an impostor and how to successfully choose the right inspector

5.12.2016 | Ing. Zdeněk Lyčka
Operators of boilers and heaters, solid fuel for power from 10 to 300 kW, connected to a hot water heating system, left last month in order to secure the obligatory checking its source authorized person (if not already). Perhaps the biggest problem are false inspectors who at the gullible and "ignorant" operators carry out checks without having to be entitled. Thus, the inspections carried out are usually cheaper than controls carried out by an authorized person, but from the perspective of the law are invalid.
1 comment, 05.12.2016 09:27

Smart cities - the cities of the future III.

5.12.2016 | Ing. Michal Lom, doc. Ing. Ondřej Přibyl, Ph.D.
This article is the third in a series of Smart Cities - the cities of the future, which is aimed to provide some concrete solutions and applications of smart cities, that are already being applied in the world and tries to describe their contribution to public administration and urban residents. In this article, we focus on two areas of Smart City - Smart Living and Smart Environment.
1 comment, 05.12.2016 20:11

The new European limits for emissions and air pollutants

29.11.2016 | Ing. Vladimír Stupavský, redakce
The European Parliament approved November 23, 2016 the new limits for selected emissions and air pollutants. For Member States resulting from this new commitments to reduce certain emissions in two stages - from 2020 and from 2030. For the Czech Republic based on commitments to the middle threshold in comparison to the commitments of other EU members. Prescribed emission reductions will be mainly sulfur dioxide, nitrogen oxides, ammonia emissions and fine particulate matter (airborne dust).
6 comments, last 30.11.2016 16:45

Restrictions on burning brown coal in small heat sources in the Czech government documents

28.11.2016 | Ing. Zdeněk Lyčka
The article describes the role of coal in the segment of small household heating heat source. Support of brown coal boilers in the framework of subsidies from European funds is in full swing, but many of these boilers failed to comply with the European Commission.
On the other hand, there are mechanisms by which the Czech Republic wants significantly reduce the burning of brown coal in small combustion sources in the foreseeable future. It is most often quoted Czech against-fossil law, but it is not alone one.
78 comments, last 15.05.2017 22:52

Coal price hike heralds the decline of the coal business

16.11.2016 | Mgr. Bc. Eva Mahdalová, Ing. Boris Tomčiak, CFA, FRM, Finlord s.r.o.
Coal prices in Europe rose during 2016 by a staggering 69%. Coal producers suffer from the decreasing demand and are forced to reduce mining. It fell by 10%. Direct response is an increase in coal prices. It can be expected that the coal industry will continue to decline and the forehead will receive renewable energy sources. In renewables has already begun to invest in China. The rise in the price of coal should count and households.
22 comments, last 07.01.2017 15:35

Undesirable substances produced during gasification

14.11.2016 | Ing. Pavel Friedel, Ing. Václav Peer, VŠB – TU Ostrava, Výzkumné energetické centrum
The article describes the formation of various types of impurities (solid, liquid and gaseous) during the gasification of solid fuels. In each type of reactor (refer to article Gasification – principles and reactors) is produced different amount of impurities with different composition. In this article are described formation and chemical composition of the impurities.
7 comments, last 24.11.2016 06:51

Cracow: the beginning of the end of Polish coal?

19.10.2016 | Mgr. Klára Sutlovičová
Poland still produces about 80 to 90 % of its electricity from coal. Three quarters of European households dependent on coal for heating are in Poland. The government is known for its continuous opposition to any EU legislation aimed at reduction of coal consumption. Every year, however, about forty thousands of people in Poland die from causes directly related to air pollution. Polish cities and towns are covered with heavy smog. Cracow, a city having the third dirtiest air in Europe, has recently adopted an unprecedented ban: a ban on use of solid fuels such as coal and wood for home heating. Is Cracow paving the way for Poland´s independency on coal?
7 comments, last 20.10.2016 23:59

Retreat from fossil fuels is already confidently

6.10.2016 | Ing. Vladimír Stupavský, redakce
The European Parliament approved 4. 10. 2016 climate treaty and the European Union joined by China, the United States, India and other countries in the fight against the increase in greenhouse gas emissions and the use of coal in power.
36 comments, last 12.10.2016 10:22

An Introduction to Fusion Energy – Production of electricity

19.9.2016 | Ing. Slavomír Entler, doc. RNDr. Jan Mlynář, Ph.D., Ústav fyziky plazmatu AV ČR, doc. Ing. Václav Dostál, Ph.D., Ústav energetiky Fakulty strojní ČVUT
Nuclear fusion is the energy source of the Sun and all other stars. Time is coming when nuclear fusion will produce electricity. A five-part series Mastery of sun describes the state of the art of developing a fusion power plant. Fifth last article deals fuel cycle and the production of electricity. A fusion reactor fuel cycle represents a whole new technology. The first generation of fusion reactors will use lithium placed in the blanket to produce tritium, which will then be separated and used for the fusion reaction. Stocks of fusion fuel are found in the world's oceans and are practically inexhaustible. Fusion power stations will be inherently safe and without negative effects on the environment. The price of electricity production from nuclear fusion will be comparable to the cost of electricity production from nuclear power plants.
19 comments, last 24.09.2016 17:09

An Introduction to Fusion Energy – Nuclear technology

12.9.2016 | Ing. Slavomír Entler, doc. RNDr. Jan Mlynář, Ph.D., Ústav fyziky plazmatu AV ČR, doc. Ing. Václav Dostál, Ph.D., Ústav energetiky Fakulty strojní ČVUT
Nuclear fusion is the energy source of the Sun and all other stars. Time is coming when nuclear fusion will produce electricity. A five-part series Mastery of sun describes the state of the art of developing a fusion power plant. The fourth article deals with the nuclear components load and design of the power reactor blanket. Thermonuclear plasma is highly stochastic system characterized by a series of confinement failures. The most serious plasma disturbances include the edge localized mode instabilities ELM, vertical displacement events, disruptions and runaway electrons. The following plasma-wall interaction puts high demands on plasma facing materials of the first wall and divertor. The important component of the fusion power reactor also is the reactor blanket, ensuring the removal of energy from the reactor and the production of tritium. There are many design proposals of the blanket, some variants of them will be tested in ITER.
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