Renewable Energy Sources

Renewable energy sources and their importance:

Humans realized what is happening around them and started to develop the appropriated technology in order to use other methods friendlier to the environment. Ellabban, et al. (2014) defines Renewable energy sources as energy sources that derive naturally and replenished by nature. Some derive directly from the sun like photo-electric, photo-chemical and thermal while others indirectly like wind, hydropower and photosynthetic energy stored in biomass, or from other natural activities like geothermal and tidal energy. Renewable energies are basically a gift to humans from the nature since their use doesn’t imply energy that derives from fossil fuels. With the development of the renewable technology

The increased level in the use of renewable energies is significant step in the reduction of the emissions but also will lead to an improvement in the air quality and public health.

Bert, et al. (2006) written that the interest in renewable energy sources such as power, wind, sun and biomass is rising. The main reasons is the risk of energy supply insecurity, the need for resource diversification, the luck of conventional energy sources and so cost increases and the climate change and pollution that is caused by the conventional energy sources. Solar, wind and biomass energy availability varies over time and between locations. Renewable energy sources are depended by their own characteristics, by geographical, techno-economic and institutional factors. ‘’Renewables’’ includes biogenic, geological, direct or indirect solar, magnetism from which electricity, heat can be produced and can be used for any kind of energy service needed, such us heat, cooling, lighting, traction process and others. Renewable energy technologies can be suited for any energy application (Abdelhamid, et al.,

Disadvantages of Renewable energies

The main disadvantages it that renewables cannot generate the same quantities of electricity as the conventional energy sources. Also renewable are rely on the weather conditions and that makes them unpredictable and inconsistent. Also because of the fact that there are new technologies they have high capital costs (Abdelhamid, et al., 2011).

2.7. Barriers in the development of Renewable Energy Technology

Fossil fuels are the main source of electricity globally but with the use of renewable energies reduction of the greenhouse gas emissions will be achieved but also diversification in the energy supply. The first barrier in the development of renewable energy technologies are the high costs. Renewable energy sources must reduce their cost in order to compete in the market and governments must have the financial ability to support the Research and Development of these technologies. Also governments must take the situation more serious and policies must be written for each type of renewable energy technology. Motives for the users must be made with these policies so it can provide to the users benefits to install them and as a result increasing demand. It is very important for the sector to have the right legislation and policies written. Doner (2007) states that ‘’Policies such as research and development, financial incentives, and procurement initiatives are appropriate for stimulating commercialization and initial markets for new