Extensive modification of TPG 704 01 - Gas consumption equipment and gas burning appliances in buildings - came into effect on 1 August 2013. Most changes are in the chapters that address the placement of gas appliances and air supply for combustion and ventilation and safety of gas appliances in version B. In this article will be mentioned and possibly commented on the most important changes.

The article deals with the influence of oil prices on the share price development of important international oil companies in the past decade, particularly in the years 2000 to 2010. Dependence between these two variables was medium strong in the previous period, regardless of dividend yields. Companies BP and PetroChina were exceptions partly, the article gave a justification for this difference. Shares of oil companies are an interesting component of the investment portfolio in the medium term due to declining oil reserves and the expected increasing of oil prices. However, in the long term we can expect increasingly replacing oil with other energy resource.

It is much more efficient to produce mechanical work by electrical engine "fuelled" by photovoltaic modules than produce the same amount of mechanical work by internal combustion engines running on fossil fuel or first-generation biofuel. The first choice could be much cheaper and produce order of magnitude more energy from agricultural land than biofuels. Therefore photovoltaics could hypothetically contribute significantly to the fulfillment of national and European target for the share of renewable energy sources (RES) in transportation.

In the U.S., in recent years due to the strong expansion of shale gas, surpluses of raw materials (such as coal), which knocked the price down sharply all around the World. On the contrary, the Russian oil giant Gazprom stops surveys of new deposits and new not open. Gazprom got the defensive in the pricing issues. In many European countries are long-term contracts clause of payments substantially changed. Questions and political strategy based on the Kremlin “Gas diplomacy” has received by the American unconventional extraction palpable hit. Gazprom and the Kremlin has weakened its position in the EU. The following text attempts to identify the main causes and consequences of major changes in the global gas market.

Recently broad media in the Czech Republic coverage on hazards from PV systems to fire fighters. Similar situation was in Germany two years ago. That is why Fraunhofer-Institut für Solare Energiesysteme ISE together with TÜV Rheinland and other partners implemented a research project „Assessment of fire risks in PV systems and development of safety concepts for risk mitigation“. The project concluded that the fire risk of PV system is much less than it is publicly alleged in Germany.
There is a small risk that fires can be started by PV components. This risk can be reduced by careful installation, initial verification i.e. inspection and testing, periodic verifications, (yield) monitoring to detect degradation problems, and verification of test procedures and maintenance requirements for conventional AC- components. Overall conclusion is that PV systems are not maintenance free.

Whole presentation from EU PVSEC (in English).

The potential of microalgae as a source of renewable energy received lately large attention. Microalgal biomass is a potential source of renewable energy and it can be converted into energies such as biodiesel, ethanol, combustible gasses or it can be used to produce pharmaceutical, food additives and other. If microalgal biofuel production is to be sustainable and economically acceptable, further optimization of microalgae production and its conversion to viable compounds is needed. Microalgae are photosynthetic microorganisms with simple growing requirements (light, sugars, CO₂, nitrogen, phosphorus, and potassium) that can fixate CO2, produce lipids, proteins and carbohydrates in very short periods of time.
These products can be processed into both biofuels and valuable co-products. Municipal, agricultural and industrial wastewaters are able to satisfy growing requirements of microalgae and hence provide cost-effective sustainable biofuel production with simultaneous wastewater treatment. Integration of biofuel production and wastewater treatment has major advantages for both industries, however major challenges needs to be overcome in order to implement such facilities in large-scale. This paper reviews current status of this topic with focus on fuel production with simultaneous algae wastewater treatment and major technological challenges.

The emissions trading scheme, EU's flagship climate policy tool, is at a turning point. With the price of carbon hovering way below €5 per tonne and a glut of permits on the market, something must be fixed or the instrument will turn to dust. As a first step towards correcting the problem, the European Commission has proposed a measure to withhold pollution permits temporarily, a process called ‘back-loading'. Back-loading appears harmless enough as all withheld allowances would re-enter the market before the end of this decade. Therefore the European Commission and many stakeholders recognise that structural measures are needed so that the ETS would support the transition towards a low-carbon economy.

In practice we constantly fix difficulties in applying the conditions for the correct placement of appliances category B, that take away combustion air from the sorrounding of the appliance and the flue gas is removed through the flue and chimney above the roof. It is important to mention that this category of appliance participates most in flue gas poisoning including poisoning with fatal aftermath, occurring in tens of cases in the Czech Republic for the year. It is caused by the incorrect application of regulatory requirements, ie in particular the TPG 704 01.

Fusion powered electricity will be an important part of the energy sector in the future. The European Fusion Development Agreement (EFDA) has published a roadmap which outlines how to supply fusion electricity to the grid by 2050. The key facilities of the roadmap are the International Thermonuclear Experimental Reactor ITER and the Demonstration Fusion Power Plant DEMO. The article brings in three parts physical basics of nuclear fusion and fusion technology, a short description of the Czech Republic's participation in fusion research and an overview of the key fusion projects.

In order to assess the diffusion rate of solar and wind power plants in the Czech residential sector, we analyse data on licenses for business in the energy industries. We arbitrary set the maximum installed capacity for installations on residential roofs on 10 kWe and find out that the current number of such installations corresponds to 0.5 % of inhabited family houses in the Czech Republic, with most installations being in the Pilsen region and least in the Karlovy Vary and Liberec regions.
When compared with the overall development of solar power plants, it shows that the installations of up to 10 kWe accounted for about 35 % of all the solar power plant installations, but only for 1.9 % of the total installed capacity. Micro wind turbines are up to now not very expanded; we found only 20 installations of micro wind turbines.

In practice we constantly fix difficulties in applying the conditions for the correct placement of appliances category B, that take away combustion air from the sorrounding of the appliance and the flue gas is removed through the flue and chimney above the roof. It is important to mention that this category of appliance participates most in flue gas poisoning including poisoning with fatal aftermath, occurring in tens of cases in the Czech Republic for the year. It is caused by the incorrect application of regulatory requirements, ie in particular the TPG 704 01.

Fusion powered electricity will be an important part of the energy sector in the future. The European Fusion Development Agreement (EFDA) has published a roadmap which outlines how to supply fusion electricity to the grid by 2050. The key facilities of the roadmap are the International Thermonuclear Experimental Reactor ITER and the Demonstration Fusion Power Plant DEMO. The article brings in three parts physical basics of nuclear fusion and fusion technology, a short description of the Czech Republic's participation in fusion research and an overview of the key fusion projects.

In practice we constantly fix difficulties in applying the conditions for the correct placement of appliances category B, that take away combustion air from the sorrounding of the appliance and the flue gas is removed through the flue and chimney above the roof. It is important to mention that this category of appliance participates most in flue gas poisoning including poisoning with fatal aftermath, occurring in tens of cases in the Czech Republic for the year. It is caused by the incorrect application of regulatory requirements, ie in particular the TPG 704 01.

Fusion powered electricity will be an important part of the energy sector in the future. The European Fusion Development Agreement (EFDA) has published a roadmap which outlines how to supply fusion electricity to the grid by 2050. The key facilities of the roadmap are the International Thermonuclear Experimental Reactor ITER and the Demonstration Fusion Power Plant DEMO. The article brings in three parts physical basics of nuclear fusion and fusion technology, a short description of the Czech Republic's participation in fusion research and an overview of the key fusion projects.

After the crisis in the 70 20^th century, the European Community compared with a high dependency on oil and OPEC. Currently, the EU finds itself in a similar situation, depending on many energy commodities supplied from the Russian Federation. Text of the article identifies the issues the EU's dependence on gas supplies from RF and a variety of tools which Brussels and the Member States can effectively fight against unilateral dependence.

How long can the oil reserves last? An average inhabitant of the world consumes per day about 75 times more energy than he or she is able to exert physically by the strenth of his/her own muscles. About 80% of world energy consumption is provided by fossil fuels, among which crude oil is still the most important one. A substantial part of oil was cosumed in 150 years while the data on current oil reserves is rather contradictory. Some discrepances in the data on oil reserves are pointed out in this article.

Centralized provision of hot water in the apartment building is associated with the specifics of four (commercial space, unmetered amount of heat for the preparation and distribution of hot water, the limits of specific consumption of heat, heat supply technology for domestic hot water through residential transfer stations).