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Journal ArticleDOI

An overview of concentrated solar energy and its applications

17 Nov 2018-International journal of ambient energy (Taylor & Francis)-Vol. 39, Iss: 8, pp 898-903
TL;DR: In this paper, the authors present general descriptions, current projects and summary of the concentrated solar energy (CSE) technologies and present application areas show that CSE can be used in a wide variety of systems, could provide significant environmental and monetary benefits.
Abstract: Overview of the present-day concentrated solar energy (CSE) technologies is presented. Approaches to concentrating solar energy are reviewed and the current projects worldwide of CSE technologies are compared. This paper presents general descriptions, current projects and summary of the CSE technologies. Parabolic trough collectors (PTCs) technology is found to be a mature technology. The linear Fresnel collectors (LFCs) technology is still in the experimental stage. The tower solar power (TSP) technology is preferred for large scale due to the cheapness. Sterling/dish collectors (SDCs) technology is designed especially for remote applications and has the highest overall efficiency and the highest operating temperature. The application areas show that CSE can be used in a wide variety of systems, could provide significant environmental and monetary benefits.
Citations
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Journal ArticleDOI
TL;DR: In this paper, the two-step thermochemical cycle with regard to reaction heat source, metal oxide characteristics, and chemical reactors was reviewed. And the possibility of achieving large-scale industrial production and the perspective on future material development were also analyzed.

72 citations

Journal ArticleDOI
TL;DR: In this paper, the current state of electricity generation and the development of the biomass, wind and solar energy industry in South Africa are discussed and recommendations are suggested on the steps that can further drive the integration of renewable energy technologies into the present energy mix of the country.
Abstract: The rising energy demand has started to overwhelm the existing power generating plants in South Africa. Also, the conventional electricity generating plants are largely responsible for the high greenhouse gas emissions recorded in the country. In an attempt to mitigate CO2 emissions and provide reliable electricity for its people, South Africa is gradually developing its renewable energy sector. This review chronicles electricity generation in South Africa from inception to date. It examines the current state of electricity generation and the development of the biomass, wind and solar energy industry in South Africa. Additionally, the growth of renewable energy technologies is discussed and recommendations are suggested on the steps that can further drive the integration of renewable energy technologies into the present energy mix of the country.

39 citations

Journal ArticleDOI
TL;DR: In this article, the design of an energy conversion system operating on solar radiation harvesting and converting it into electricity with the help of thermopiles is presented, where the major major...
Abstract: The present work aims at improving the design of an energy conversion system operating on solar radiation harvesting and converting it into electricity with the help of thermopiles. Here, the major...

16 citations

Journal ArticleDOI
TL;DR: In this paper, a solar thermal system which uses solar dish collector is applied in order to provide a portion of the required thermal load in the process and the results demonstrate that by this modification number of units of the Zn system reduces and the chemical process is simplified.

16 citations

References
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Journal ArticleDOI
TL;DR: A survey of the various types of solar thermal collectors and applications is presented in this paper, where an analysis of the environmental problems related to the use of conventional sources of energy is presented and the benefits offered by renewable energy systems are outlined.

2,620 citations

Journal ArticleDOI
TL;DR: An overview of the parabolic-trough collectors that have been built and marketed during the past century, as well as the prototypes currently under development can be found in this paper.
Abstract: This paper presents an overview of the parabolic-trough collectors that have been built and marketed during the past century, as well as the prototypes currently under development. It also presents a survey of systems which could incorporate this type of concentrating solar system to supply thermal energy up to 400 °C, especially steam power cycles for electricity generation, including examples of each application.

915 citations


"An overview of concentrated solar e..." refers background in this paper

  • ...Applications of CSE is found in different fields (Rabl 1976; Fernandez-Garcia et al. 2010; Zhang et al. 2013; Francis and Bupesh Raja 2015)....

    [...]

Journal ArticleDOI
TL;DR: In this paper, the authors present a methodology to predict hourly beam (direct) irradiation from available monthly averages, based upon combined previous literature findings and available meteorological data, and illustrate predictions for different selected STC locations.
Abstract: Concentrated solar power plants (CSPs) are gaining increasing interest, mostly as parabolic trough collectors (PTC) or solar tower collectors (STC). Notwithstanding CSP benefits, the daily and monthly variation of the solar irradiation flux is a main drawback. Despite the approximate match between hours of the day where solar radiation and energy demand peak, CSPs experience short term variations on cloudy days and cannot provide energy during night hours unless incorporating thermal energy storage (TES) and/or backup systems (BS) to operate continuously. To determine the optimum design and operation of the CSP throughout the year, whilst defining the required TES and/or BS, an accurate estimation of the daily solar irradiation is needed. Local solar irradiation data are mostly only available as monthly averages, and a predictive conversion into hourly data and direct irradiation is needed to provide a more accurate input into the CSP design. The paper (i) briefly reviews CSP technologies and STC advantages; (ii) presents a methodology to predict hourly beam (direct) irradiation from available monthly averages, based upon combined previous literature findings and available meteorological data; (iii) illustrates predictions for different selected STC locations; and finally (iv) describes the use of the predictions in simulating the required plant configuration of an optimum STC. The methodology and results demonstrate the potential of CSPs in general, whilst also defining the design background of STC plants.

834 citations


"An overview of concentrated solar e..." refers background in this paper

  • ...Comparison between CSE technologies (Zhang et al. 2013)....

    [...]

  • ...Applications of CSE is found in different fields (Rabl 1976; Fernandez-Garcia et al. 2010; Zhang et al. 2013; Francis and Bupesh Raja 2015)....

    [...]

Journal ArticleDOI
TL;DR: This paper reviews the present day solar thermal technologies and performance analyses of existing designs, mathematical simulation, design and fabrication of innovative designs with suggested improvements have been discussed.
Abstract: The use of solar energy in recent years has reached a remarkable edge. The continuous research for an alternative power source due to the perceived scarcity of fuel fossils is its driving force. It has become even more popular as the cost of fossil fuel continues to rise. The earth receives in just 1 h, more energy from the sun than what we consume in the whole world for 1 year. Its application was proven to be most economical, as most systems in individual uses requires but a few kilowatt of power. This paper reviews the present day solar thermal technologies. Performance analyses of existing designs (study), mathematical simulation (design) and fabrication of innovative designs with suggested improvements (development) have been discussed in this paper.

640 citations

Journal ArticleDOI
TL;DR: In this paper, the authors compared a variety of solar concentrators in terms of their most important general characteristics, namely concentration, acceptance angle, sensitivity to mirror errors, size of reflector area and average number of reflections.

541 citations


"An overview of concentrated solar e..." refers background in this paper

  • ...Applications of CSE is found in different fields (Rabl 1976; Fernandez-Garcia et al. 2010; Zhang et al. 2013; Francis and Bupesh Raja 2015)....

    [...]