The world energy demand is increased each year so it is important to analyze how this demand is covered. As a consequence, it is imperative to accommodate the different frameworks to make that happen. Wind energy has proved itself as a generation source in which countries can rely on, so to simultaneously solve the dilemma of this type of generation resources, technology and policy-, the renewable energy sector should be studied. The aim of this work is to analyse situation of wind energy in one of the main countries in the European Union within this type of generation: Spain. A brief analysis of the current situation is made, accounting the importance of wind energy in the electric generation and future plans. Moreover, the evolution of the legislative frameworks is studied with the aim of figuring out if there is a relation between them and the changes in the annual installed powe concluded that Spain has an extraordinary renewable resource but planning, predictability and legal framework are needed to achieve a more sustainable energy model.

The rising concerns over global warming, environmental pollution and energy security have increased interest in developing renewable and environmentally friendly energy sources such as wind, as the replacements for fossil fuels. Wing energy conversion systems have become the main point in the research of renewable energy sources. The Government of Germany has made a serious commitment to include wind energy in its future energy policy. The aim for the present work is to analyse the wind energy in Germany under of view. The results show the current situation and future perspectives of these sources by energy systems.

Abstract. The aim of this work is to explore the possibilities of extending the Sierra de Tineo wind farm. We study the location chosen, the wind resource in the area and simulate the wind regime with computer tools. The economic and sensitivity study of the investment, as well as the new Legislation of the Principality of Asturias is also considered.

The growing decrease of traditional fuels leads to the development of a new energy model. Biomass poses as an energy alternative that can substitute fossil fuels. In this context, this work aims to study the necessities and possible solutions in biomass production for conventional energy systems in populated-industrial environments. The methodology applied evaluates the use of biomass by collecting both the integrity of the management process and the transformation of the existing resources to start up bioenergy plants for domestic and industrial markets. The results show both the energetical and environmental importance that biomass shows in said locations in terms of reducing Greenhouse Gasses (GHG) and the development of future environmentally sustainable systems through energy-renewable projects.