Navigation Links
Adding up renewable energy
Date:8/13/2007

Do the overall efficiencies of renewable energy sources, such as wind, solar, and geothermal add up in terms of their complete life cycle from materials sourcing, manufacture, running, and decommissioning" Researchers in Greece have carried out a life cycle assessment to find the answer.

Increasing energy consumption and a growing world population implies shrinking reserves of fossil fuels. While the use of fossil fuels brings with it the problem of carbon dioxide emissions and climate change. Our continued dependence on fossil fuels coupled with the pressing global issue of climate change has pushed the concept of renewable energy sources to the top of the agenda.

In looking for alternative energy supplies, there is more to simply adding up the outputs, according to Christopher Koroneos and Yanni Koroneos of the Laboratory of Heat Transfer and Environmental Engineering, at the Aristotle University of Thessaloniki, Greece. They argue that a whole life cycle assessment of any environmentally friendly energy supply must be carried out to ensure its green credentials are valid.

Writing in Inderscience's International Journal of Global Energy Issues, the researchers point out that land use and materials employed are just two aspects of renewable energy development that can have an adverse impact on the otherwise positive environmental picture.

There are three viable renewable energy resources, say the researchers - solar energy, wind power and geothermal energy. They have applied the techniques of life cycle assessment (LCA) to each in order to determine the total environmental impact and to compare this with the effects of equivalent energy release from fossil fuels.

The LCA approach allows an assessment to be made of the flow of material and energy used in the construction, operation and ultimate decommissioning of a renewable energy supply. It also takes into account the manufacturing of components, the possible extraction and supply of fuels as well as waste generated in these processes.

The researchers demonstrate that some renewable energy systems based on wind power and geothermal energy do have valid green credentials in electricity production. The efficiency of these systems is comparable over the complete life cycle than the equivalent fossil fuel system. However, the conversion of solar energy to electricity using photovoltaic solar cells is less efficient in terms of materials production, running, and recycling than non-renewable energy. However, economies of scale come into play with solar power and a large enough area of solar cells would outstrip the fossil fuel system. The team also points out that the life cycle pollution of solar systems is much, much lower than any conventional system although thermodynamic efficiency is lower.

"A significant advantage of the use of renewable energy systems," say the researchers, "is that they are environmentally friendly because overall they result in lower dangerous pollutant emissions, this and one other major factor, they are essentially inexhaustible."


'/>"/>

Contact: Christopher Koroneos
koroneos@aix.meng.auth.gr
Inderscience Publishers
Source:Eurekalert

Related biology news :

1. Adding Radiation Therapy To Chemotherapy Improves Survival In Patients With High-risk Breast Cancer
2. Adding radiation decreases breast cancer recurrence
3. The first tree genome is published: Poplar holds promise as renewable bioenergy resource
4. Special Imaging Study Shows Failing Hearts Are Energy Starved
5. Growth in biomass could put US on road to energy independence
6. Hydrogen and methane provide raw energy for life at Lost City
7. Study of energy and health in Africa focuses spotlight on charcoal and forest management
8. Scientific issues associated with carbon-neutral energy sources such as cellulosic ethanol
9. Cholera pathogen reveals how bacteria generate energy to live
10. Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice
11. Energy management in cells may hold key to cancer defense
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/4/2017)... 4, 2017  GCE Solutions, a global clinical research organization (CRO), ... anonymization solution on October 4, 2017. Shadow is designed to assist ... with policy 0070 of the European Medicines Agency (EMA) in meeting ... ... ...
(Date:7/20/2017)... WASHINGTON , July 20, 2017 Delta (NYSE: ... to board any Delta aircraft at Reagan Washington National Airport (DCA). ... Delta launches biometrics ... Delta,s ... Delta Sky Club is now integrated into the boarding process to ...
(Date:6/14/2017)... 15, 2017  IBM (NYSE: IBM ) is introducing several ... dedicated to developing collaboration between startups and global businesses, taking ... During the event, nine startups will showcase the solutions they ... industries. France is ... with a 30 percent increase in the number of startups ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... At its national ... Dr. Suneel I. Sheikh, the co-founder, CEO and chief research scientist of Minnesota-based ... selected for membership in ARCS Alumni Hall of Fame . ASTER Labs ...
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ComplianceOnline’s Medical ... place on 7th and 8th June 2018 in San Francisco, CA. The Summit brings ... well as several distinguished CEOs, board directors and government officials from around the world ...
(Date:10/11/2017)... the Netherlands and LAGUNA HILLS, Calif. ... The Institute of Cancer Research, London ... use MMprofilerâ„¢ with SKY92, SkylineDx,s prognostic tool to risk-stratify patients ... trial known as MUK nine . The University of ... trial, which is partly funded by Myeloma UK, and ICR ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology today ... designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) ... able to cross the cell membrane and bind intracellular STAT3 and inhibit its ...
Breaking Biology Technology: