TITLE

Enhanced efficiency of a parabolic solar trough system through use of a secondary radiation concentrator

AUTHOR(S)
Ferrer, P.
PUB. DATE
September 2008
SOURCE
South African Journal of Science;Sep/Oct2008, Vol. 104 Issue 9/10, p383
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Solar electric energy is not yet economically competitive with fossil fuels. Apart from large capital outlay, solar systems suffer from low efficiency of converting solar energy to electric power. In this paper, a receiver for a solar trough was investigated in which the dominant radiation losses were suppressed by reducing the radiation area. The concentration ratio of the primary concentrator (a parabolic mirror) was enhanced by use of a simple secondary concentrator (an optical funnel), which minimized the width of the focal line. The resultant radiation losses were significantly reduced (by 22%). The novel aspect in this work was the design and modelling of a solar radiation receiver with secondary concentrator and black-body chamber. An initial model of this receiver showed an improvement of overall efficiency of about 1% for solar to electric power generation as compared to conventional receivers. Application of a receiver built on this model could reduce heat losses and costs of a solar trough system.
ACCESSION #
36170319

 

Related Articles

  • Arizona sets Solar Course. Spring, Nancy // Electric Light & Power;Mar/Apr2007, Vol. 85 Issue 2, p30 

    The article provides information on the Solar Electric Roadmap Study in Arizona. The purpose of the study is to promote the adoption of solar power and to develop a solid solar electric industry in the state. The study estimates that up to 1,000 megawatts (MW) of solar electricity could be...

  • Green Energy Options. Miller, Reed // Industrial Heating;Jun2008, Vol. 75 Issue 6, p18 

    The article presents the author's views on how to save energy. The author suggests that the U.S. should reduce its dependence on foreign energy sources, and make use of its own natural resources. According to the author, one way to gain energy independence and reduce the use of fossil fuels is...

  • Solar Energy Conversion. Crabtree, George W.; Lewis, Nathan S. // AIP Conference Proceedings;9/12/2008, Vol. 1044 Issue 1, p309 

    If solar energy is to become a practical alternative to fossil fuels, we must have efficient ways to convert photons into electricity, fuel, and heat. The need for better conversion technologies is a driving force behind many recent developments in biology, materials, and especially nanoscience.

  • Utility Prospects Under the Sun. Robertson, Chris // Solar Today;Jul/Aug2004, Vol. 18 Issue 4, p28 

    Focuses on the potential evolution of electric utilities as a substantial new market for the solar industry. Benefits of such prospect for both utilities and solar industry; Need for a change in utilities' perspective and strategy on solar energy; Ways through which utilities can fully realize...

  • Make Iraq a True "Green Zone". Wright, Gregory // Solar Today;Nov/Dec2007, Vol. 21 Issue 6, p27 

    The article discusses the importance of using solar energy in addressing climate crisis and Iraq's insufficient source of energy. Although the U.S. had already spent more than $4 billion on restoring electrical power in Iraq, CNS News reports that Iraq's electricity has a very limited progress....

  • Utility Turns to Solar Power at Wastewater Plant.  // WaterWorld;Jun2005, Vol. 21 Issue 6, p58 

    Reports on the decision of the Atlantic County Utilities Authority (ACUA) in New Jersey to sign an agreement to install a solar energy system at its wastewater treatment plant in Atlantic City. Project cost; Construction and completion schedule; Aim of the incentive to reduce the city's energy...

  • Do Incentives Work?: An Analysis of Residential Solar Energy Adoption in Miami-Dade County, Florida. VARELA-MARGOLLES, AILEEN; ONSTED, JEFFREY // Southeastern Geographer;Spring2014, Vol. 54 Issue 1, p18 

    In light of scientific predictions about the deleterious effects of climate change, it is crucial to promulgate effective energy policies that can successfully transition human society from fossil fuels to renewable sources. In this study, we wished to identify which, if any, demographic...

  • At last, IPPS get a look in. Nevin, Tom // African Business;Mar2012, Issue 384, p52 

    The article reports on the increasing power deficit in South Africa. It mentions that the government have asked the private sector and independent power producers (IPPs) to contribute to the national energy industry. Further it mentions that the first stage will produce 1,416MW renewable energy...

  • The ease of going green.  // Utility Week;8/1/2003, Vol. 20 Issue 7, p16 

    Focuses on a survey conducted by Mori on renewable energy aspirations in Great Britain. Concern on the cost of renewable energy; Percentage of respondents who knew how to cut energy bills; Factors affecting the idea of renewable energy.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics