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.

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.

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.

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?

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.

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.

In assessing flueways in timber construction or buildings with wooden ceilings the attention must be paid not only to the execution of the chimney both ceramic or metal, but also flues and heat sources, which can also be the cause of a fire in the building.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The heating is different from the circulating water supply by solving the transmission capability (thermals) and power control (thermals + hydraulics). Basic control condition (default) ensures adjustment of elements on the required thermal and hydraulic parameters. Regulating processes are derived from this status, as well as the heat savings in heating. The savings can be solved only through a project and nothing else.

The issue of energy utilization of waste and the connected construction of new facilities is a very actual phenomena. The article addresses primary the trends of waste treatment and contemplates the option of energy utilization of waste from different perspectives. In a not insignificant part of the article is described the waste as a fuel, which means its composition and properties. This article is first from a prepared miniseries about waste.

The article, with its theme of gear just beginning to cell cycle at a relatively broad topic of “thermodynamic phenomena in the pipeline and its surroundings”, describes the current situation in the field of pipeline networks and in the field of energy related equipment, determining the operating condition of the whole heating systems. This is essentially a search condition and trends of modern heating, working as using conventional manufacturing processes, as well as the application of engineering principles and methods in the field of far less obvious. This two-part article, articles and downstream, is also setting research targets thermodynamic and hydraulic phenomena in pipes and in its vicinity, which gradually obtaining knowledge useful in practice, will be precisely processed using mathematical, mostly numerical, models.