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Brief Production of electrical power from renewable energy sources presents a chance to: satisfy the society?s power needs without encumbering the environment with combustion products of, among others, lignite and coal, energy security as well as become independent from traditional energy source suppliers. The aim of this article is to present the methodology used when designing wind farms utilising a group of wind turbines. The article presents the objectives of the European Union?s policy on renewable energy sou...

Co-operation of renewable energy sources (photovoltaic cells or micro-wind turbines) with 230V receivers, eg LED substitutions of traditional light sources, requires the conversion of low voltage direct current electricity to 230V AC. Various designs of DC/AC converters intended for island operation and synchronized with the power grid were tested. The Hioki 3196 energy quality analyzer was used for the study. The stand-alone systems are used in voltage converters of very simple solutions converting DC power to AC...

One of the main factors determining economic and social development of particular countries is availability of cheap energy source. In a case of European countries, this availability has also important influence on the integration process. Amount of produced energy in given country tells about the level of its civilizing development. Also so-called energy independence that most countries are aimed and which guarantees political independence is strictly related to this problem. It can be assumed, that energy is one...

The papers presents the realization of Project Gorona el Viento and its operation on the smallest of Canary Islands. El Hierro was recognized as UNESCO biosphere reserve. Therefore the new model of energy supply, based exclusively on renewable energy sources, seemed to be reasonable. Earlier power was obtained from diesel transported from the mainland. The hybrid solution, system including the wind farm, water pumped power plant and a set of pumps has been adopted. Power obtained of the wind turbines supplies hous...

Today energy consumption in the world is constantly increasing and therefore using energy more effectively and reduce energy consumption has been discussed a lot more. Nowadays, trend of stimulating renewable energy production is at the forefront. In this regard, in Slovakia use of renewable energy sources for home electricity and heat generation following European Union support and the project Green to Households is developed considerably. The return on investment on these funds is indeed longer, but we should ta...

The major factor that may affect the ability of ground as a heat storage medium as such is the diversity of substrate materials or groundwater. The residential houses in Okotoks, in the province of Alberta, Canada are good examples of using soil as the heat storage medium. It is worth mentioning that this is not high-efficient solution and it is justified in the case of supply thermal energy needed for heating energy efficient buildings. In particular, it might be useful for passive constructions characterized by ...

Contribution deals with a future development of an area affected by brown coal mining. The area consists of Chomutov, Most, Teplice and ?st? nad Labem districts located in the northern Bohemia at the foot of the Ore Mountains. Even though the land is severely damaged by the coal mining, the future potential can be sustainable there. Due to good experience with reclamation and restoration processes, the area is constantly renewed and integrated back to the surrounding landscape. It is important to concentrate on re...

The basic tasks of building and production sphere, housing and communal services are connected with life protection and comfortable conditions creations for people. In this way the automated control systems of distributed energy supply and life support facilities play an important part. The main scientific direction in this area is increasing their energy efficiency. Paper represents results of implementation of automated dispatch control systems of distributed energy supply and life support facilities that includ...