scholarly journals Solar termal and electricity. A state of the art

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Debrayan Bravo Hidalgo ◽  
Alexander Báez Hernández
Keyword(s):  
Thermal Energy ◽  
Power Plants ◽  
Large Scale ◽  
State Of The Art ◽  
Scientific Productivity ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Solar Concentrators ◽  
Publish Or Perish ◽  
Storage Technologies

The objective of this contribution is to provide a state-of-the-art on research in solar thermal electricity systems. This objective is achieved using Scopus, and the softwears “Publish or Perish” and “VOSviewer”. The results of the research show the behavior of scientific productivity in this area. As well as the most productive thematic areas. Nations that lead the research in the generation of electric power on a large scale, using solar thermal energy. Network of scientific collaboration among nations, referring to the research of electricity generation through solar thermal energy. Correlation network among the most productive authors, in this subject within the Scopus directory. Most cited articles by each of the main journals that disseminate this theme. Conceptual bases of the generation of electricity with solar thermal energy. Properties of thermal energy storage technologies (TES) in power plants with parabolic solar concentrators or solar concentration towers. Current technologies and trends. Technological trends. Trends in the global energy market.

scholarly journals Brief on Solar Concentrators: Differences and Applications

2020 ◽  
Vol 19 (5) ◽  
pp. 371-378
Author(s):  
Mokhtar Ghodbane ◽  
Djamel Benmenine ◽  
Abderrahmane Khechekhouche ◽  
Boussad Boumeddane
Keyword(s):  
Renewable Energy ◽  
Thermal Energy ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Solar Thermal ◽  
Electricity Production ◽  
Energy Concentration ◽  
Solar Thermal Energy ◽  
Solar Concentrators ◽  
Solar Electricity

In light of the global crises that the world suffers from, the renewable energy exploitation is a viable solution to remedy the various energy crises, knowing that renewable energy is a source of environmental credibility, as it does not cause any pollution or any emissions harmful to the environment. Among the most important renewable energy sources, solar energy is the most important type as it can be exploited thermally by adopting various solar collectors, especially solar concentrators. This paper has been devoted to illustrate the types of solar concentrators, namely point-focus concentrators (Heliostat Field Collectors and Parabolic Dish Collectors) and linear concentrators (Linear Fresnel Reflectors and Parabolic Trough Collectors), in an attempt to clarify its principle and its multiple uses domestically and industrially, especially in areas that are characterized by the abundance of its direct solar radiation. The solar concentrator is a solar thermal energy concentration system, because its use reduces the consumption of fossil fuels harmful to the environment and directly contributes to climate change. Solar thermal concentrators are an effective alternative to fossil generators for thermal energy, as they have many important uses such as the solar electricity production of solar electricity in power plants, industrial and domestic water heating, and have many other industrial uses.

Mechanism of Upgrading Low-Grade Solar Thermal Energy and Experimental Validation

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Hui Hong ◽  
Hongguang Jin ◽  
Jun Sui ◽  
Jun Ji
Keyword(s):  
Energy Level ◽  
Thermal Energy ◽  
Power Plants ◽  
Thermal Power ◽  
Chemical Energy ◽  
Solar Thermal ◽  
Low Grade ◽  
Thermal Power Plants ◽  
Solar Thermal Energy ◽  
Middle Temperature

Solar thermochemical processes inherently included the conversion of solar thermal energy into chemical energy. In this paper, a new mechanism of upgrading the energy level of solar thermal energy at around 200°C was revealed based on the second law thermodynamics and was then experimentally proven. An expression was derived to describe the upgrading of the energy level from low-grade solar thermal energy to high-grade chemical energy. The resulting equation explicitly reveals the interrelations of energy levels between middle-temperature solar thermal energy and methanol fuel, and identifies the interactions of mean solar flux and the reactivity of methanol decomposition. The proposed mechanism was experimentally verified by using the fabricated 5kW prototype of the receiver∕reactor. The agreement between the theoretical and the experimental results proves the validity of the mechanism for upgrading the energy level of low-grade solar thermal energy by integrating clean synthetic fuel. Moreover, the application of this new middle-temperature solar∕methanol hybrid thermochemical process into a combined cycle is expected to have a net solar-to-electric efficiency of about 27.8%, which is competitive with other solar-hybrid thermal power plants using high-temperature solar thermal energy. The results obtained here indicate the possibility of utilizing solar thermal energy at around 200°C for electricity generation with high efficiency by upgrading the energy level of solar thermal energy, and provide an enhancement to solar thermal power plants with the development of this low-grade solar thermochemical technology in the near future.

scholarly journals Solar-Augment Potential of U.S. Fossil-Fired Power Plants

2011 ◽  
Author(s):  
Craig S. Turchi ◽  
Nicholas Langle ◽  
Robin Bedilion ◽  
Cara Libby
Keyword(s):  
Thermal Energy ◽  
Power Plants ◽  
Solar Power ◽  
Combined Cycle ◽  
Solar Thermal ◽  
Separate Analysis ◽  
Solar Thermal Energy ◽  
Parabolic Trough ◽  
Natural Gas Combined Cycle ◽  
The Difference

Concentrating Solar Power (CSP) systems utilize solar thermal energy for the generation of electric power. This attribute makes it relatively easy to integrate CSP systems with fossil-fired power plants. The “solar-augment” of fossil power plants offers a lower cost and lower risk alternative to stand-alone solar plant construction. This study ranked the potential to add solar thermal energy to coal-fired and natural gas combined cycle (NGCC) plants found throughout 16 states in the southeast and southwest United States. Each generating unit was ranked in six categories to create an overall score ranging from Excellent to Not Considered. Separate analysis was performed for parabolic trough and power tower technologies due to the difference in the steam temperatures that each can generate. The study found a potential for over 11 GWe of parabolic trough and over 21 GWe of power tower capacity. Power towers offer more capacity and higher quality integration due to the greater steam temperatures that can be achieved. The best sites were in the sunny southwest, but all states had at least one site that ranked Good for augmentation. Geographic depiction of the results can be accessed via NREL’s Solar Power Prospector at http://maps.nrel.gov/.

scholarly journals Large-scale thermal energy storage systems to increase the ST share in DHC

2020 ◽  
Author(s):  
Paolo Leoni ◽  
Nicolas Pardo-Garcia ◽  
Fabian Ochs ◽  
Abdulrahman Dahash
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Large Scale ◽  
State Of The Art ◽  
Storage Systems ◽  
Water Storage ◽  
Hot Water ◽  
Integration Schemes ◽  
Storage Technologies ◽  
Thermal Energy Storage Systems

This factsheet focuses on large-scale hot water storage technologies adopted to integrate large shares of ST in DHC systems. After an overview of role and integration schemes of large storage systems in existing and future-oriented DHC, the state of the art is described and the highlights of international applications are reported, including a comparison of the different technologies in terms of strengths and weaknesses.

Large-Scale Nanophotonic Solar Selective Absorbers for High-Efficiency Solar Thermal Energy Conversion

2015 ◽  
Vol 27 (31) ◽  
pp. 4585-4591 ◽  
Author(s):  
Pengfei Li ◽  
Baoan Liu ◽  
Yizhou Ni ◽  
Kaiyang Kevin Liew ◽  
Jeff Sze ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Large Scale ◽  
High Efficiency ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion
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