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Archiv článků od 27.10.2014 do 27.1.2015

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27.1.2015
Ing. Vladimír Stupavský, redakce TZB-info, Klastr Česká peleta

The article describes the results of global pellet markets and especially detailed analysis of production and consumption of certified ENplus pellets in the world for the last year. Major trends in the pellet industry are described mainly from the perspective of Europe, which is a defining market for czech market.

19.1.2015
doc. Ing. Tomáš Matuška, Ph.D., ČVUT v Praze, Univerzitní centrum energeticky efektivních budov

Text is focused on the energy effectiveness of the heat pump installations operated in the system for space heating and domestic hot water preparation. Conventional heat pumps are operated in hot water system with low coefficient of performance (COP). Heat demand structure in multifamily buildings with high heat use for hot water influences the energy effectiveness of heat pump operation. Moreover, combination with space heating results in high installed heat capacity of the units which is not used during the year.

12.1.2015
RNDr. Ladislav Metelka, Ph.D., Český hydrometeorologický ústav, pobočka Hradec Králové

The ozone layer is essential for life on Earth. It protects the biosphere against excessive doses of UV radiation. Anthropogenic emissions of ozone-depleting CFCs caused a serious problem. Fortunately thanks to the Montreal Protocol and its appendices the ozone layer regenerates today, virtually on a global scale. Restoration of the ozone layer is accelerated by climate change, what in the future could lead to a lack of UV radiation.

12.1.2015
RNDr. Petr Čížek, A až Zet, Praha

This article describes some principles of functions BHE (Borehole Heat Exchangers) and inner borehole thermal conditions according to new knowledge, which were measured and published in the last five years. On this basis it evaluates the current marketing trends. Some of innovations may have result in a less efficient construction of BHE, or increased risk to the groundwater. For that reason the expertise of the proposed thermal wells should deal not only in terms of hydrogeological conditions, but also in terms of drilling. It is necessary to consider whether the used drilling equipment is able build some BHE with the declared parameters and whether is able to ensure the protection of groundwater as well.

12.1.2015
Ing. Vladimír Stupavský, redakce TZB-info, Klastr Česká peleta

The article discusses the Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of local space heaters (Ecolabelling), which builds on Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for local space heaters. The output will be compulsory energy labels for heating sources. However, the introduction of energy labels accompanying difficulties.

5.1.2015
Ing. Jan Blažíček, redakce

Owners of residential houses during the reconstruction usually think the following: What does not have obvious defects, it's okay. By this simplified manner can not be seen on the heating system in any way. A sign that the heating is okay, it is not only the fact that heats, but mainly that operates efficiently. And it does not recognize at first glance.

29.12.2014
Ing. Jiří Buchta, CSc., předseda sekce plyn ČSTZ soudní znalec - technické obory různé se specializací plynové zařízení (topné a technické plyny), CTI ČR

The aim of the Government Decree no. 91/2010 Coll., on conditions of fire safety during the operation of chimneys, flues and fuel appliances, is fire safety. However, the decree requires yearly fire checks even in the chimneys and flues from gas boilers, water heaters and heaters, i.e. where there a risk of fire is excluded.

The result is a growing number of fatal carbon monoxide poisoning – estimated up to 300 a year – and several times higher number of people with lasting health consequences. In the UK, where there it is not required to prevent a non-existent risk of fire in the chimneys and flues, but prevention against the risk of carbon monoxide poisoning, the number of fatal poisoning is about 100 times less (14 in the country with 60 million inhabitants).

Will be someone able to force civil servants to admit error and inform the public about effective prevention of carbon monoxide poisoning?

22.12.2014
Ing. Ladislav Tintěra

Calculation model Degreedays (D°) have been integrated to the portal tzb-info.cz 10 years ago. This model enables determinate the count of Degreedays. For the calculation is possible to set up following data: internal temperature, external temperature and the date, when the heating season started and ended. The total number of observation stations in Czech republic gone up this year to 37 locations. For the calculation is possible to use the data from 2005 to present.

15.12.2014
Ing. Aleš Bufka, Ing. Daniel Rosecký

Concept Data Support Department of the Ministry of Industry and Trade has prepared this statistical report as a comprehensive national statistics on renewable energy sources. The report focuses on the share of RES in the energy balance of the Czech Republic and describes in detail the development of the each RES categories, which are: biomass, biogas, liquid biofuels, solar, wind and water energy, heat pumps and renewable part of industrial and municipal waste. There is a description of methodology regarding data collection and consequent analysis at the beginning of each section (chapter) of the report. Data included in the report are fully comparable (compatible) with data which are reported on regular basis to International Energy Agency and Eurostat.

8.12.2014
Ing. Aleš Bufka, Ing. Daniel Rosecký

Concept Data Support Department of the Ministry of Industry and Trade has prepared this statistical report as a comprehensive national statistics on renewable energy sources. The report focuses on the share of RES in the energy balance of the Czech Republic and describes in detail the development of the each RES categories, which are: biomass, biogas, liquid biofuels, solar, wind and water energy, heat pumps and renewable part of industrial and municipal waste. There is a description of methodology regarding data collection and consequent analysis at the beginning of each section (chapter) of the report. Data included in the report are fully comparable (compatible) with data which are reported on regular basis to International Energy Agency and Eurostat.

8.12.2014
Ing. Jan Blažíček, redakce

Currently there are changes in our legislation in order to increase the energy efficiency of heating. Opinions differ on the effect of accepted changes. While some expect significant savings on heat, others, and I am one of them, draw attention to the absurdity of the whole project.

1.12.2014
Ing. Aleš Bufka, Ing. Daniel Rosecký

Concept Data Support Department of the Ministry of Industry and Trade has prepared this statistical report as a comprehensive national statistics on renewable energy sources. The report focuses on the share of RES in the energy balance of the Czech Republic and describes in detail the development of the each RES categories, which are: biomass, biogas, liquid biofuels, solar, wind and water energy, heat pumps and renewable part of industrial and municipal waste. There is a description of methodology regarding data collection and consequent analysis at the beginning of each section (chapter) of the report. Data included in the report are fully comparable (compatible) with data which are reported on regular basis to International Energy Agency and Eurostat.

24.11.2014
Ing. Ladislav Tintěra

The heating period 2013/2014 in Prague based on the observation of Prague-Karlov station was 230 days, a little longer, and with an average temperature of 6.8 °C, significantly warmer than the long-term average. The basic characteristic of heat demand for heating is 2 814 D° (19) degree days, hence, the heat demand is significantly lower than the long-term average of 3 227 D° (19). Since 2000, it's the second lowest number of degree days in the heating period.

17.11.2014
Ing. Jan Blažíček, redakce

Author of the article reflects on the contribution of the amended Decree no. 237/2014 Sb., issued by the Ministry of Industry and Trade on 7 November 2014, for increasing the energy efficiency of heating systems in buildings with central heating.

17.11.2014
Ing. Vladimír Stupavský, redakce TZB-info, Klastr Česká peleta

From November 2014 entered into force the new international standards for solid biofuels ISO 17225 for pellets, briquettes, wood chips and wood. This is a set of seven standards, which replaces the original European standard EN 14961.

10.11.2014
Ing. Juraj Šmelík

Technical tools for splitting the heating costs measure only some of the factors characterizing the mode of heating and heat consumption. Many important factors are not measured or are immeasurable. A correct allocation must take into account not only the measured values, but also the effect of the unmeasured factors.

3.11.2014
doc. Ing. Václav Kupilík, CSc., Stavební fakulta ČVUT v Praze

Paper deals with on the one hand products of smoke-burning and with their influence on human organism, on the other hand with possibility of soot- ignition at appliance on solid fuel. As a result is the crack of plastering in chimney possibly even their destruction. Claying of holes by special mixture containing glass fibres is renovation system for classic masonry chimneys. This mixture after mixing with water with application special mechanization pours into chimney hole. In conclusion the cases are specified when checks of chimney is carry out.

27.10.2014
Mgr. Oldřich Sklenář

Waste water that ends up in the sewer network contains a large amount of energy. Utilization of this energy, which is also available throughout whole year, is not yet part of the standard engineering practice in the Czech Republic. This article brings an inspiration in the form of experience from Austrian city of Amstetten, where was implemented a project, which is using combination of a sewage heat exchanger and a heat pump. State of the art as the same as the factors affecting the utilization of waste heat are also included.


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