Fresnel lens what is it, testing focal length, solar heat generated. Us20120006405a1 panelmounted photovoltaic system with. A comparative study between parabolic trough collector and linear fresnel reflector technologies. Arevas compact linear fresnel reflector technology uses mirrors to concentrate sunlight to directly create steam power.
Performance investigation of linear evacuated absorber of 2. Clfr individual reflectors can have the option of directing reflected solar radiation to at least two absorbers in linear systems. Jan 24, 2015 compact linear fresnel reflector technology by cnim. The linear fresnel reflector technology receives its name from the fresnel lens, which was developed by the french physicist augustinjean fresnel for lighthouses in the 18th century. This paper presents a procedure for making facetted mirrors to use in linear fresnel reflectors, considering the design of the transversal geometry, materials, and structure configuration. Linear fresnel reflector systems for solar radiation concentration. In this paper efforts are being made to design a rooftop linear fresnel reflector solar concentrator lfrsc system. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr. The present article presents simulation and control study of smallscale multigeneration lfr solar power plant located in sekem medical center near belbis city, egypt. Simulation and control of linear fresnel reflector solar. Satyanarayana mechanical engineering department,k l university, guntur 522501 abstractmany applications of thermal energy, both in industrial and power sectors require medium temperatures ranging from 100c to 250c. These systems lower cost and increase output by using absorbers that share mirrors.
Areva puts online us molten salt energy storage concentrated solar power csp plant. The solar thermal performance of a 102 kw rated thermal capacity linear fresnel reflector system was evaluated experimentally under fixed and variable airflow rate through the oilair heat exchanger. Fresnel reflector an overview sciencedirect topics. Linear fresnel collectors a technology overview sfera. Arevas compact linear fresnel reflector technology. The following picture shows such a lighthouse fresnel lense.
Stela world stecsp technologies linear fresnel reflector. Compact linear fresnel reflector how is compact linear fresnel reflector abbreviated. Fresnel mirror gets its name from augustinjean fresnel. Compact linear fresnel reflector how is compact linear. Pdf a linear fresnel reflector as a solar system for heating water. A second linear concentrator technology is the linear fresnel reflector system. The linear fresnel collector concept uses a number of rows of relatively small oneaxis tracking mirrors that concentrate the radiation on a linear receiver.
Design and analysis of rooftop linear fresnel reflector solar. They are named for their similarity to a fresnel lens, in which many small, thin lens fragments are combined to simulate a much thicker simple lens. Performance investigation of linear evacuated absorber of. Flat or slightly curved mirrors mounted on trackers on the ground are configured to reflect sunlight onto a receiver tube fixed in space above the mirrors.
The absorber is an inverted air cavity with a glass cover enclosing an absorber. Compact linear fresnel reflector and linear fresnel reflector are not proper nouns so linear and reflector should not be capitalized in the title and only fresnel should be capitalized the text. Linear fresnel reflector systems for solar radiation. About the linear fresnel reflector technology linear fresnel reflectors use stretched narrow segments of mirrors to focus sunlight onto a fixed metal collector pipe that runs axially above the array of reflectors located at a common focal point of the reflectors.
Simulation of a linear fresnel solar collector concentrator. It includes theoretical analyses, computational tools and mathematical formulae to facilitate the development, design, construction and. Linear fresnel reflector how is linear fresnel reflector. Linear fresnel reflector an overview sciencedirect topics. Compact linear fresnel reflector the solar eclipse. A system comprises first and second fresnel reflectors. Four different assemblies of the structure that supports and shapes the mirror are documented and evaluated. The linear fresnel reflector mirror is considered more effective because of its simplicity and effortless fabrication. Each of the fresnel reflectors comprises a fresnel surface with a focus, a radiating surface opposite the fresnel surface, and a photovoltaic element mounted to the fresnel surface, in thermally conducting contact with the radiating surface. Linear fresnel reflector based solar radiation concentrator.
Pdf linear fresnel reflector systems design parameters. Download fulltext pdf download fulltext pdf simulation and control of linear fresnel reflector solar plant article pdf available in international journal of. An array of linear narrow and long mirrors mounted on an axis which can be rotated to align to the sunlight individually. This book offers a complete guide to designing linear fresnel reflector systems for concentrating solar radiation. The motional design and analysis for linear fresnel reflector. Department of physics, indian institute of technology, hauz khas, new delhi. Acceptance testing procedure for linear fresnel reflector. The principle of this lens is the breaking of the continuous surface of a standard lens into a set of surfaces with discontinuities between them.
Parametric study of the small scale linear fresnel reflector. Basic linear fresnel reflector configuration seen from one end. Pdf simulation and control of linear fresnel reflector. The flat plate solar collectors are suitable for low temperature applications maximum up to 80oc and parabolic concentrators are suitable for high temperatures applications above 300oc. However, in this case, the parabolic shape is achieved by almost flat linear facets. A linear fresnel solar collector concentrator may have a lower efficiency than the other concentrating geometries, but the likely reduced cost may well compensate that, providing a solution for costeffective solar energy collection on a large scale. Clfr individual reflectors can have the option of directing reflected solar radiation. Abstract linear fresnel reflector lfr solar collectors is a promising technology that has a. Compact linear fresnel reflector clfr power plant technology. International journal of renewable energy researchijrer. The radiation is reflected and concentrated onto fixed linear receivers mounted over the mirrors, combined or not with secondary concentrators. The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. Linear fresnel reflectors lfr are also based on solar collector rows or loops. Material and component specifications linear fresnel reflector.
Computer simulation of linear fresnel reflectors youtube. Numerous mirrors are used to absorb the solar energy and transfer it to the absorber which built correspondingly with the reflectors. Experimental evaluation of solar thermal performance of. This book serves as a complete guide to designing linear fresnel reflector systems for solar radiation concentration, gives a complete overview of their theoretical analysis, and provides useful and efficient calculation procedures that can be used to model and develop their practical application. Thermal performance prediction of a trapezoidal cavity. It includes theoretical analyses, computational tools and mathematical formulae to facilitate the development, design, construction and application of these systems. Mar 28, 2018 energy3d simulations of linear fresnel reflector solar power plants around the world. A methodology for an optical optimization of the intercept factor concerning a linear fresnel reflector is described to increase the amount of solar irradiation that will be delivered in the absorber for agua prieta, sonora. The advantages of linear concentrating fresnel collectors include relatively simple construction, low wind loads, a stationary receiver and high ground usage 2. A linear fresnel reflector works by utilizing the fresnel lens effect which was first developed by french physicist augustinjean fresnel. Linear fresnel reflector lfr technology has significant potential for development and major advantages of lfr system is that. Irjet performance analysis of the solar linear fresnel reflector. Arevas compact linear fresnel reflector technology helioscsp.
For the performed optimization, the intercept factor is determined as a. The solar thermal system consisted of 240 mirrors linear fresnel solar reflectors, each of 1485 by 625 mm size to heat the thermal oil, which was used to heat the air. Optical characteristics of linear fresnel collectors lfc. Performance analysis of the solar linear fresnel reflector. Dec 06, 2017 a linear linear fresnel reflector clfr also referred to as a concentrating linear fresnel reflector is a specific type of linear fresnel reflector lfr technology. An assembly that implies a curved, pleated aluminum rectangular plate with a thin silveredglass. Development and lifecycle testing of a low cost waterborne. A compact linear fresnel reflector clfr also referred to as a concentrating linear fresnel reflector is a specific type of linear fresnel reflector lfr technology. Despite the widespread deployment and operation of a solar power plant that uses the parabolic trough concentrator ptc compare to the linear fresnel reflector lrc. Linear fresnel reflector lfr solar power generation fig. Therefore, it is one of the key input elements to find the technical and economic optimum of most of the solar field parameters.
However, it suffers from low optical efficiency affected by optical losses such as blocking and shading. Linear fresnel reflector lfr solar mirrors are analogues of the parabolic trough mirror, just as central receiver heliostats are analogues of parabolic dish collectors. A fresnel lens is a flattened version of a convex lens. This paper discusses the utilization of the linear fresnel reflector system as an effective, cheap and easy way of sunlight capture in operation and maintenance compared to parabolictrough system.
The linear absorber is a part of the linear fresnel reflector solar concentrator system, in which hot fluid is generated. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system. Introduction solar reflectors are significant tools to concentrate the solar irradiance in a small area to get thermal energy at a high temperature. A fresnel lens uses the crosssections of the curvature of a convex lens, but flattens them onto planar surface. Design, manufacturing and characterization of linear fresnel.
Major components of lfr power generation include the liner reflective. The utility model discloses a fresnel gathering device, which comprises reflectingmirror fields, receiving devices and maintaining and overhauling spaces, wherein each reflectingmirror field comprises at least one column of reflectingmirror strips which are arranged in parallel, the receiving devices are arranged in parallel on the reflectingmirror strips, and each maintaining. Linear fresnel reflector lfr technology sciencedirect. Compact linear fresnel reflector technology by cnim. Linear fresnel reflectors use long, thin segments of mirrors to focus sunlight onto a fixed absorbed at a common focal point of the reflectors. A trapezoidal cavity absorber for a linear fresnel reflector concentrator is analyzed and optimized via cfd simulation. It combines arevas clfr for concentrated solar power csp parks with the molten salt test loop mstl, allowing the captured energy to. An alternative method to optimize mirrors positions in linear fresnel reflector linear fresnel reflector lfr is regarded to as a promising concentrated solar power technology csp. Linear fresnel reflector lfr system consists of long, parallel narrow mirror strips which focus the solar rays on the absorber tube. Wind loads on linear fresnel reflectors technology.
A linear fresnel reflector as a solar system for heating water. Design and analysis of rooftop linear fresnel reflector. The first of these is giving the concentrator the ability to follow the sun, that is, the mirrors and the frame of the reflector automatically rotate as the sun moves throughout the day. This work presents an optimization of a linear fresnel reflector based on the computational fluid dynamics, the entropy generation rate and the. Parametric study of the small scale linear fresnel re. These mirrors are capable of concentrating the suns energy to.
This paper presents a methodology for performance acceptance testing of solar boilers using linear fresnel reflectors lfr with direct steam generation. Clfr is a linear fresnel reflector system with several or many linear absorbers in the system, allowing the construction of plants in the multimegawatt range fig. However, it suffers from low optical efficiency affected by. Pdf using ray track technology and geometrical analysis, this paper has presented novel design method which can be applied to mirror. Methodology for an optogeometric optimization of a linear. Of interest is the construction of a solar field based on compact linear fresnel reflectors 3 made in the form of a solar adapter to existing thermal electric power stations in order to produce compressed hot water or saturated steam. This work presents an optimization of a linear fresnel reflector based on the computational fluid dynamics, the. Nevertheless, the wind effect on the fresnel technology is one of the main design stresses for the metallic structure, primary reflectors, receivers and solar tracking system. The motional design and analysis for linear fresnel. Linear fresnel reflector lfr solar collectors have a good potential in small scale solar applications for heating, cooling, and power generation. Introduction the third technology to be introduced is compact linear fresnel reflector or known as concentrating linear fresnel reflector clfr. But rather than using trough or dishshaped mirrors common to other concentrating solar systems, arevas technology uses a system of nearly flat mirrors, arranged in louverlike arrays and motorized to track the sun, to. Design and analysis of rooftop linear fresnel reflector solar concentrator k.
During 1961, clfr was invented by giovanni francia in italy. Linear fresnel reflector, simulation model, receiver tube, incident angle modifier, concentrator efficiency 1. Linear fresnel reflector system, light tracking analysis, loss of cosine effect. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email. For the performed optimization, the intercept factor is determined as a function of the. Download fulltext pdf download fulltext pdf simulation and control of linear fresnel reflector solar plant article pdf available in international journal of renewable energy research 9 june. The sunlight is further concentrated by a small linear concave mirror to the evacuatedtube absorber. Underlying principle the linear fresnel reflector is made up of multiple mirrors. The idea on which fresnel concentrator is based in the use of a series of flat, long and parallel mirrors that focus solar radiation in a linear focus on a receiver tube where the reflected. The present article describes the numerical study of heat transfer analysis in a trapezoidal cavity absorber of a linear fresnel reflector solar concentrator lfrsc system.
Presentation mode open print download current view. This book serves as a complete guide to designing linear fresnel reflector systems for solar radiation concentration, gives a complete overview of their theoretical analysis, and provides useful and efficient calculation procedures that can. Energy3d simulations of linear fresnel reflector solar power plants around the world. The first and second fresnel reflectors form a vertex having a dihedral angle.
Pdf optical design of linear fresnel reflector solar concentrators. Irjet performance analysis of the solar linear fresnel. An experimental test rig of a concentrated pvthermal system that employs a linear configuration and horizontal absorber was built for. The solar thermal system consisted of 240 mirrors linear fresnel solar reflectors, each of 1485 by 625 mm size to heat the thermal oil, which was used to heat the air using the oil to air heat. It was developed in the early 19th century, as a way to reduce the amount of glass material needed to build a convex lens specifically for large lighthouse lenses. Pdf a linear fresnel reflector as a solar system for. The fresnel principle the linear fresnel reflector technology receives its name from the fresnel lens, which was developed by the french physicist augustinjean fresnel for lighthouses in the 18th century. Linear fresnel reflector how is linear fresnel reflector abbreviated.
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