The present article presents simulation and control study of smallscale multigeneration lfr solar power plant located in sekem medical center near belbis city, egypt. A solar power tower consists of an array of distribute. End losses minimization of linear fresnel reflectors with. This paper evaluates compact linear fresnel reflector clfr concepts suitable for large scale solar thermal electricity generation plants. Fresnel reflector definition of fresnel reflector by the. Pdf a linear fresnel reflector as a solar system for heating water. This technology can be very useful especially in remote and arid areas. Introduction solar reflectors are significant tools to concentrate the solar irradiance in a small area to get thermal energy at a high temperature. Design parameters optimization and theoretical performance. Optical design and concentration characteristics of linear fresnel reflector solar concentratorsi. To increase the efficiency of concentrated solar power csp plants, the use of optimization methods is a current topic of research.
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. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system. The basic principle remains the same with the mirrors collecting solar power which is then utilized to generate steam which in turn drives a turbine. The lfr has segmented primary reflectors which are placed. Pdf this paper aims to examine the optical behavior of a small experimental setup for linear fresnel reflector. Fresnel lens what is it, testing focal length, solar heat generated. A second linear concentrator technology is the linear fresnel reflector system. It uses flat mirrors as opposed to parabolic mirrors that are used in solar parabolic troughs. Linear fresnel reflectors lfr are constructed from long thin segments of mirrors reflectors which work on the fresnel principle, the concentrated sunlight is received on a central linear absorber receiver which contains the working fluid and converts the reflected solar energy into thermal energy. A lfr system consists of an array of slightly curved reflectors. Novatec solar espana, is a linear fresnel reflector system, figure 8, 8.
Linear fresnel reflector lfr technology sciencedirect. The production of electricity from solar radiation is a direct process. The concentrating performances of linear frensel reflectors are determined by considering the errors of manufacturing and facet positioning relative to the sun. Linear fresnel reflector based solar radiation concentrator. The present article presents simulation and control study of smallscale multigeneration lfr solar power plant located in. 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. Linear fresnel reflector solar concentrator technology is similar to solar trough technology in which the sunlight is reflected by a series of mirrors onto an absorber tube, thus linear f resnel reflector solar concentrator, is a linear line concentrator. Fresnel lens prisms that make up a fresnel lens bend and magnify light rays, creating a single, concentrated beam of light. International journal of renewable energy researchijrer. Linear fresnel reflectors, as shown fig 1 use long, thin segments of mirrors to focus sunlight onto a fixed absorber located at a common focal point of the reflectors. The solar concentrating processes are simulated by using the mcrt approach. This paper focuses on applying an integrated optimization technology to a solar thermal application, more. Pdf optical performance assessment of a small experimental. Design and analysis of rooftop linear fresnel reflector solar concentrator k.
Linear fresnel reflector systems for solar radiation concentration offers a complete guide to designing linear fresnel reflector systems for concentrating solar radiation. 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. The twostage linear fresnel reflector solar concentrator is analyzed via an indepth study of an installed, nominally 220 kw t system. Parametric study of the small scale linear fresnel re. This work presents the study of a smallscale lfrorc power plant installed in errachidia, morocco.
Linear fresnel reflector lfr solar collectors have a good potential in small scale solar applications for heating, cooling, and power generation. Solar concentration in italy for solar steam production prior to. Linear fresnel reflectors lfr are also based on solar collector rows or loops. Renewable energy private limited kgds for concentrating. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Parabolic trough, molten salt and direct steam power towers, molten salt and direct steam linear fresnel, dish stirling, a generic csp model, integrated solar combined cycle. This paper is focused on small scale linear fresnel reflectors. Performance investigation of linear evacuated absorber of 2.
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. The radiation is reflected and concentrated onto fixed linear receivers mounted over the mirrors, combined or not with secondary concentrators. Material and component specifications linear fresnel reflector. Design and analysis of rooftop linear fresnel reflector solar. Dec 16, 2010 a numerical model of a linear frensel reflector lfr with oriented facets is suggested. Experimental and optical performances of a solar cpv. Linear fresnel reflector how is linear fresnel reflector. Concentrations of the linear fresnel reflector with the. These receivers and mirrors are part of ausras kimberlina solar thermal power plant, a linear fresnel reflector system located near bakersfield, california. G dispatchability is typically achieved by decoupling solar thermal collection and power production with a.
Linear fresnel reflector lfr system consists of long, parallel narrow mirror strips which focus the solar rays on the absorber tube. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email. 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 systems, which are a type of linear concentrator, are active in germany, spain, australia, india, and the united states. Linear fresnel reflector lfr solar mirrors are analogues of the parabolic trough mirror, just as central receiver heliostats are analogues of parabolic dish collectors. The performance of the system depends on the design parameters, mass flow rate, etc. Analysis of solar thermal power generation report solar. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Compact linear fresnel reflector as a basic fresnel system is scaled up, the spacing between. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr. Compact linear fresnel reflector clfr power plant technology. Analysis of a twostage linear fresnel reflector solar. Flt linear fresnel collector manufacturer soltigua. 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.
This manual is a simplified version of the operation and maintenance manual provided by kgds. It includes theoretical analyses, computational tools, and mathematical formulae to facilitate the development, design, construction, and application of these systems. The principle of this lens is the breaking of the continuous surface of a standard lens. It has been called the invention that saved a million ships. Compact linear fresnel reflector the solar eclipse. 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 1. Pdf a linear fresnel reflector as a solar system for. Zhangjiakou 50mw csg fresnel project you can also access information on csp projects under construction, under development, request for offer, or currently nonoperational. Computer simulation of linear fresnel reflectors youtube. Parabolic trough and concentrating linear fresnel reflectors are classified as linear focus collector types. In the proposed system, a standard linear fresnel reflector lfr with eastwest rotational tracking was placed on northsouth rails and driven by a.
Fresnel reflector synonyms, fresnel reflector pronunciation, fresnel reflector translation, english dictionary definition of fresnel reflector. Negi, a comparative study of optical designs and solar flux concentrating characteristics of a linear fresnel reflector solar concentrator with tubular absorber, solar energy materials and solar cells, vol. Sam includes models for the following kinds of csp systems. A solar cpv device using a linear fresnel reflector lfr concentrator is described. In 2000, mills and morrison developed the compact linear fresnel solar reflector concept, using several stationary absorbers spared between the mirror rows. Fresnel reflectors utilize the fresnel lens effect, which, unlike a standard mirror, consists of a reflector with a large aperture and short focal length. Performance analysis of the solar linear fresnel reflector. Clfr individual reflectors can have the option of directing reflected solar radiation to at least two absorbers in linear systems. 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. A fresnel lens uses the crosssections of the curvature of a convex lens, but flattens them onto planar surface. Simulation of a linear fresnel solar collector concentrator.
Parametric study of the small scale linear fresnel reflector. A comparative study between parabolic trough collector and linear. Jan 24, 2015 compact linear fresnel reflector technology by cnim. These reflectors use the fresnel lens effect, which allows for a concentrating mirror with a large aperture and short focal length. 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.
Cnim is a specialist in the construction of complex nonfossil energy power plants waste, biomass. Simulation and control of linear fresnel reflector solar. Underlying principle the linear fresnel reflector is made up of multiple mirrors. Linear fresnel reflector lfr solar power generation fig. Compact linear fresnel reflector how is compact linear fresnel reflector abbreviated. A fresnel lens is a flattened version of a convex lens. They are named for their similarity to a fresnel lens, in which many small, thin lens fragments are combined to. Simulation of a linear fresnel solar collector concentrator simulation of a linear fresnel solar collector concentrator.
These systems lower cost and increase output by using absorbers that share mirrors. Appointment of consultant for detailed engineering and. Pdf this work is concerned with assessing the thermal performances of a solar water heating system which is dependent on a linear fresnel receiver. A small scale test rig of the concentrator is constructed to investigate the actual optical and iv performances of the cpv device. A linear fresnel reflector as a solar system for heating water. Linear fresnel reflector, simulation model, receiver tube, incident angle modifier, concentrator efficiency 1. However, the pivotal attempt to employ it for large linear system for solar collection was developed both linear and two axis tracking fresnel reflector systems 7. Stela world stecsp technologies linear fresnel reflector. The linear fresnel concentrating solar mechanism is composed of the parallel reflective surfaces usually flat mirrors, the metal structure, the tracking mechanism, the secondary receiver optionally and the receiver. A linear fresnel reflector is another type of solar power collector.
Optical characteristics of linear fresnel collectors lfc. 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. Linear fresnel reflector uses a single axis tracking system. Linear concentration of solar energy by multiple flat or slightly curved surfaces basic components. Pdf progress in the design and the applications of linear fresnel. Final results of the combocfb project concentrated solar power csp is a renewable energy technology, which is able to provide dispatchable power according to demand. Learn about the advantages of our lf11 fresnel collector for solar process heat and direct steam generation. May 22, 2016 advantage of compact linear fresnel reflector fresnel system requires only the flat or lessshaped mirrors because flat mirrors are cheaper and can bent. Linear fresnel reflector is a solar concentrating technology with concentration ratio in the range of 10 to 50. However, in this case, the parabolic shape is achieved by almost flat linear facets. Design, manufacturing and characterization of linear fresnel. Many fresnel power plants are currently suppliers for heat generation and electricity sector 10. Fresnel reflector an overview sciencedirect topics. In addition, the book presents a concise yet thorough.
Sanchezrodriguez a a department of electrical engineering, university of oviedo, campus of gijon, spain b department of mathematics, university of oviedo, campus of gijon, spain article info article history. Compact linear fresnel reflector how is compact linear. Compact linear fresnel reflector solar thermal powerplants. Organic rankine cycle orc powered by linear fresnel reflector lfr is a promising technology to harvest lowgrade heat sources to produce electricity. It includes theoretical analyses, computational tools and mathematical formulae to facilitate the development, design, construction and application of these systems. Energy flux distribution and thermal performance of linear. The reflector strips are moved in a way that they always reflect the sunlight on to the receiver tubes. Pdf optimization of a trapezoidal cavity absorber for. In india, reliance power has completed and connected to the grid a 125 mw compact linear fresnel reflector plant, designed and constructed by areva solar.
Performance investigation of linear evacuated absorber of 2stage solar linear fresnel reflector module under nonuniform flux distribution. Cost parameter of the shaft of the secondary reflector system vm. In the clfr, it is assumed that there will be many parallel linear receivers elevated on tower structures that are close enough for individual mirror rows to have the option of directing reflected solar radiation to two alternative linear receivers on. Design and analysis of rooftop linear fresnel reflector. Mar 28, 2018 energy3d simulations of linear fresnel reflector solar power plants around the world. Cost estimation relationships of a small scale linear fresnel reflector. 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. Design and analysis of a highefficiency, costeffective. Progress in the design and the applications of linear. The parabolic trough collectors ptc consist of solar collectors mirrors, heat receivers and support structures. 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. Fresnel system allow the developer a consideration reduction of investment compare to parabolic trough curved mirror which is more expensive and the extra cost of the solar tower. Design of a parabolic trough solar collector using a.
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. Optical modeling of the linear fresnel solar field 2. The following picture shows such a lighthouse fresnel lense. It is shown that an lfr can operate efficiently for eight. This book offers a complete guide to designing linear fresnel reflector systems for concentrating solar radiation. Linear fresnel systems and the future for concentrated. In order to compensate for end losses in linear solar concentrators which can account for 33% of the optical losses, a mechanically simple twoaxis tracking system was designed and analyzed. Compact linear fresnel reflector technology by cnim. An assembly that implies a curved, pleated aluminum rectangular plate with a thin silveredglass. Basic linear fresnel reflector configuration seen from one end. References for the solar process heat models are listed separately below. The lfr field which are comprise of 11 rows of flat mirrors can be imagined as a brokenup parabolic trough reflector by using linear segments to focus the radiation, as figure 1 shows. Linear fresnel reflector systems for solar radiation.