Small wind turbines in comparison with large ones are usually applied at much lower altitudes, which correspond to the substantially lower wind speed. Wind speed at nominal power is achieved rarely or never. For estimation of energy production a dependence of power output on wind speed (performance curve) at lower wind speeds is substantial.

The article deals with the possibility of increasing of the energy production efficiency from photovoltaic plants. Input documentation was provided by PV power plant operator in South Moravia, from their installations up to 0.5 MWp. The article aims to analyze the possibilities of increasig operation efficiency, both in terms of technical design and optimization of already finished PV plants and comparation with real facts and economic factors.

The article deals with the basic trends in electric light sources and phasing out inefficient energy sources from the market. The article provides a very good overview of the sudden development of specific performance of each new promising types of light sources, whether they are electrodeless source or light emitting diodes LEDs.

The structure of electricity prices, focused on the history and the contribution of the support of electricity production from renewable energy sources, combined heat and power generation and secondary energy sources.

Micro-level is optimization of the individual segments of the heating system, for example, greater operating efficiency of heat recovery units. Followed by middle-level, such as designing of heating circuits, and the macro-level - management optimalisation due to energy consumption.

Secretary of State for Energy and Climate Change, Chris Huhne, proclaimed: "Renewable energy technologies will deliver a third industrial revolution." He criticised "faultfinders and curmudgeons who hold forth on the impossibility of renewables – the unholy alliance of climate sceptics and armchair engineers who are selling Britain’s ingenuity short."

The city of Olomouc is the owner of an interesting low-energy building for education center Sluňákov with a focus on developing the relationship between man and nature. Construction was awarded the Grand Prix of architects in 2007.

The article describes the methodology of experimental verifying of the performance of heat pump in real conditions. Namely the air-water type of heat pump was evaluated. Heat pump has been observed in extreme climatic conditions and the resulting measured and calculated parameters were compared with the parameters specified by its manufacturer.

Regular inspection is focused to the boiler, smoke flue and accessories condition, its security and regulation. In addition to the technical condition and maintenance, the documentation, operating instructions, manuals and other documents are under inspection. It quantifies the overall boiler efficiency of measurement results, sets reference respectively minimum boiler efficiency and suggests possible actions.

Oil is the energy source No. 1, and the world is in a period of peak oil. Serious paralysis of economy after peak oil is almost certain, because economic growth demanded increasing consumption of fossil fuels from the beginning of the industrial revolution.
The Czech Republic can ensure its energy security only in integrating with Europe, and especially the connection to Europe's energy (especially electricity and gas) and transport networks and participation in the transformation of post-fossil energy and transport system.

With regard to the program Green for savings the speculations appeared that the producers of thermal insulating materials increased the prices in reaction to the introduction of the subsidy, so that, ultimately, investors pay the same as if the subsidy had ever been introduced.

Passive houses reduce the need for heating to compensate the heat loss through the building facade and ventilation. But at the same time it increases consumption of the auxiliary energy for circulation pumps and fans. The analytical result can be for many readers quite surprising.

In 2010 it was delivered to the domestic market, over 80 thousand small combustion plants for solid fuels. Of these, 24 000 stove and fireplace inserts, stoves 50 000, less than 5000 kitchen ranges and over 1000 spa stoves. Around 50% of these devices are imported. Hot-water heat exchanger is fitted with 15-20% of sold heaters.

The article presents the second part of the report, which is the result of research of all available statistical sources relating to the development of prices of solid fuels for household. This section focuses on trade in wood pellets and briquettes.

The present report is the result of processing of all available statistical sources relating to the development of prices of solid fuels for household. there are monitored price indicators of graded types of coal and coke, lignite, peat and wood briquettes, wood and vegetable pellets and firewood.

The article is the result of surveys conducted in the work of raw material and energy department statistics, the Ministry of Industry and Trade. Material published in August 2011 includes data on molded (formed) fuels (briquettes and pellets) made from biomass (wood and plant), peat, coal and paper.