Renewable Energy Sources

Modern societies consume huge amounts of energy for the heating of residential and office space, the means of transport, the production of electricity and the operation of industrial plants. With the progress of the economy and raising the standard of living, energy demand is rising steadily. Nowadays, most of the energy we use comes from conventional energy sources that are petroleum, gasoline and coal. These are non-renewable sources of energy that will soon or soon be exhausted. The production and use of energy from these sources creates a series of environmental problems with their peak, the greenhouse effect known to all of us.
Interest in the increased exploitation of RES and the development of reliable and cost-effective technologies that bind their potential was first presented after the first oil use of 1979 and was consolidated over the next decade after the awareness of global environmental problems. For many countries, RES is a major domestic energy source with great potential for local and national development. They contribute significantly to their energy balance, contributing to reducing dependence on expensive and imported oil and enhancing the security of their energy supply. At the same time, they also contribute to the protection of the environment, as their utilization does not burden them, since they are not accompanied by production of pollutants or gases that increase the risk of climate change. It has now been established that the energy sector is primarily responsible for environmental pollution, as almost 95% of air pollution is due to the production, transformation and use of conventional fuels.
The main advantages of RES are as follows:
They are practically inexhaustible sources of energy and help reduce dependence on conventional energy resources.
They respond to the energy problem of stabilizing carbon dioxide emissions and other greenhouse gases. In addition, by replacing power plants from conventional sources, they reduce emissions from other pollutants eg. oxides of sulfur and nitrogen that cause acid rain.
They are indigenous sources of energy and contribute to strengthening energy independence and security of energy supply at national level.
They are geographically scattered and lead to decentralization of the energy system, enabling energy and energy needs to be met at local and regional level, thus relieving infrastructure systems and reducing energy transmission losses.
They offer the rational use of energy resources, covering a wide range of users' energy needs (eg solar energy for low temperature heat, wind energy for electricity).
They typically have low operating costs that are not affected by fluctuations in the international economy, and in particular conventional fuels prices.
RES investments generate a significant number of new jobs, especially at the local level.
They can in many cases be the core of revitalizing economically and socially degraded areas and a pole for local development by promoting similar investments (eg greenhouse cultivation using geothermal energy).
The most known renewable energy sources are
• Wind Energy: Wind is a renewable energy source that provides potential for large scale power generation using wind turbines without serious environmental impacts. Wind turbines (horizontal or vertical axis) are used both together with battery in small installations and complementarily with photovoltaic elements, and are most often connected to the grid. The upcoming release of electricity in 2001 has led to the construction of many wind farms across Greece.
• Solar Energy: Solar radiation is used to heat buildings directly or indirectly using both active and passive systems as well as for electricity generation. Electricity is produced in two ways: a) using photovoltaic systems that convert solar energy directly into electricity; and b) solar thermal systems that use solar energy to heat a steam-producing liquid that feeds a a turbine and a generator.

 

Comadante L.T.D.

Comadante Ltd is a company with a strong international presence in various fields such as Construction of Infrastructure, Building and Industrial Works, Homes & Settlements, Photovoltaics, Renewable Energy Sources, Urban Lighting & Safety Systems, Medical Equipment, Technical Assistance Management and Project Management.

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 Tsartolias Chriss - CEO
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Nick Kolonis - Manager Advice
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