The paper is focused on general description of boilers and their basic classification on the basis of using fuels and main design differences. There are mentioned general descriptions and parameters of particular sorts of boilers. There is put the most emphasis on water tube boilers for combustion of solid fuel and description of grate systems.

Birthplace of energy cooperatives is Scandinavia. Energy cooperatives are common in Germany too, they begin to pursue in Australia, USA, Canada, United Kingdom and other countries. In Denmark, cooperative ownership was a key factor of successful development of renewable energy in this country.

The amount of volume coefficient depends on elevation of location of gas consumption and the temperature of gas flowing through the gasometer. In this paper we describe the procedure by which you can check that the coefficient of volume on the invoice is correct. The coefficient is one of the factors that affect your cost of gas.

At present, nobody knows how the energy future will look like. What is certain is that fossil resources can be depleted in the horizon of decades. Proven reserves of uranium – if the power consumption should be replaced by current reactors – would last for only a few years. There are only three promising energy technologies: nuclear fusion, fast breeder reactors with closed fuel cycle and renewable energy sources, along with energy efficiency. While commissioning of the first fusion power plant is expected the earliest by 2040, and demonstration plants with so-called generation IV reactors in 2030, renewable energy sources are already massively installed at present. Construction of nuclear power plant is always more expensive and takes more time than originally planned. Situation of renewables and especially photovoltaic is the reverse – they are built faster and the prices are lower than anyone imagined.

The paper deals with basic separation of fuels and their classification on the basis of various points of view. There are mentioned descriptions of basic characteristics of fuels which are usually determined for standard fuels. Lastly, there are mentioned general parameters of the most widespread fuels and short description of incineration.

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 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 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 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.