Government and alliance retain a nonexclusive royaltyfree license to publish or. Jun 14, 2016 industrial solar fresnel collector video industrial solar. Parametric study of the small scale linear fresnel re. Similar in design to a fresnel lens is a fresnel mirror or reflector. 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. 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. If optical efficiency of a parabolic trough collector is in the range of 7880 percent, a linear fresnel collector is 70 percent in the best case, says markus eck, from the institute of technical thermodynamics at dlr. Fresnel reflector an overview sciencedirect topics. 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. This paper evaluates compact linear fresnel reflector clfr concepts suitable for large scale solar thermal electricity generation plants.
The first three of these technologies use the heat collected from the sun. Parabolic trough linear fresnel reflectors types of systems how they work parabolic trough solar systems use long, parabolicshaped mirrors or linear fresnel reflectors to collect and focus sunlight onto a. The thermal evaluation is based on the energy assessments characterized by the differential equations of pure water with a flow mass. These technologies can be used to generate electricity for a variety of applications, ranging from remote power systems as small as a few kilowatts kw up to gridconnected. The compact linear fresnel reflector is a solar thermal energy system currently at prototype stage in australia. System modelling of the compact linear fresnel reflector. Arevas compact linear fresnel reflector technology helioscsp.
Modelling of cavity receiver heat transfer for the compact. An investigation into unsteady flow patterns in the cavity receiver of the compact linear fresnel reflector was performed using computational methods. 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. Compact linear fresnel reflector how is compact linear. Compact linear fresnel reflector solar thermal powerplants. 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. G dispatchability is typically achieved by decoupling solar thermal collection and power production with a. Fresnel reflector synonyms, fresnel reflector pronunciation, fresnel reflector translation, english dictionary definition of fresnel reflector. Csp specific conditions to produce power, such as areas where direct sunlight is most intense e. 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. Linear fresnel reflector how is linear fresnel reflector. Underlying principle the linear fresnel reflector is made up of multiple mirrors. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email.
The compact linear fresnel reflector clfr is a concept for a largescale linefocus solar concentrator for use in thermal power stations. 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. May 22, 2016 introduction the third technology to be introduced is compact linear fresnel reflector or known as concentrating linear fresnel reflector clfr. Linear fresnel reflector based solar radiation concentrator. The principle of this lens is the breaking of the continuous surface of a standard lens. Then, the two free extremes of the mirror are pushed up. Compact linear fresnel reflector areva puts online us molten salt energy storage concentrated solar power csp plant it combines arevas clfr for concentrated solar power csp parks with the molten salt test loop mstl, allowing the captured energy to be dispatched both at day and night. From then on, lots of research was gradually carried out. 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. Ppt concentrating solar collectors powerpoint presentation. A compact linear fresnel reflector clfr also referred to as a concentrating linear fresnel. A linear fresnel reflector works by utilizing the fresnel lens effect which was first developed by french physicist augustinjean fresnel. Distributed concentrator for solar power generation. 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.
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. Jan 14, 2010 but parabolic trough reflector performance is still superior. 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. Concentrating solar collectors portland state university solar engineering spring 2008 carolyn roos, ph. 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. Fresnel lens prisms that make up a fresnel lens bend and magnify light rays, creating a single, concentrated beam of light. Parabolic troughs are the most commercially available technology. 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. In addition to this, the company have been working for several years on a variation of a linear fresnel concept, the compact linear fresnel reflector clfr system 34, 35. An experimental and numerical investigation of a small linear fresnel for water heating application has been carried out in blida, algeria. The compact linear fresnel reflector is a solar thermal energy system. In addition, a free opensource steam tables package freesteam. Linear fresnel reflectors use long, thin segments of mirrors to focus sunlight onto a fixed absorbed at a common focal point of the reflectors.
Pdf first results from compact linear fresnel reflector. 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. During 1961, clfr was invented by giovanni francia in italy. Design, manufacturing and characterization of linear fresnel. Compact linear fresnel reflector technology by cnim. 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. Alternatively, an innovative concept of compact linear fresnel reflector clfr system with multiple receivers is developed to minimize energy losses as depicted in fig. Produced for compact linear fresnel reflector clfr solar system resources total project. The following picture shows such a lighthouse fresnel lense. Linear fresnel reflector clfr solar array technology already developed for a coal saving. Instead of light passing through a lens to be concentrated, the light is. These systems lower cost and increase output by using absorbers that share mirrors. Pdf solar thermal electric plants without storage are being developed that use low cost compact linear fresnel. 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.
A linear analogue of the central receiver concept, it. They are named for their similarity to a fresnel lens, in which many small, thin lens fragments are combined to. Compact linear fresnel reflector technology by cnim concentrating solar power plant cnim groupe. Thermal performance prediction of a trapezoidal cavity. The linear fresnel reflector lfr technology is of growing. Pdf system modelling of the compact linear fresnel reflector. Compact linear fresnel reflector sun is the future. But parabolic trough reflector performance is still superior. Diy solar energy ultimate free guide to do it yourself solar. Compact linear fresnel reflector wikimili, the free. Compact linear fresnel reflector clfr system employing multiple receivers is promising with better optical performance and cost effectiveness compared to linear fresnel reflector lfr system, especially for applications with limited ground availabilities. Clfr compact linear fresnel reflector technology uses reflected sunlight to heat liquidfilled tubes which generate highpressure steam that produces electricity via turbines. The numerical simulation with a 1d modeling in transient mode was performed by using the finite difference method.
Steamcircuit model for the compact linear fresnel reflector. Introduction the third technology to be introduced is compact linear fresnel reflector or known as concentrating linear fresnel reflector clfr. Industrial solar fresnel collector video industrial solar. Different from the lfr system, one receiver is installed at each side of the solar field, which allows consecutive mirrors to redirect the sunlight to the two receivers. 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. In order to enhance the utilization of land area and reduce the shading created by adjacent reflectors, mills and morrison invented the multiabsorption towers technology based on compact linear fresnel reflector which was suitable for largescale solar thermal power plants 4, 5. Numerous mirrors are used to absorb the solar energy and transfer it to the absorber which built correspondingly with the reflectors. The compact linear fresnel reflector clfr, shown in figure 1 is a concept for a largescale solar thermal power plant. Computer simulation of linear fresnel reflectors duration. Design and analysis of rooftop linear fresnel reflector solar concentrator k. Compact linear fresnel solar thermal power generation ready. Pdf transient modelling of cavity receiver heat transfer for the. Linear fresnel and power tower technologies are presently being planned as commercial plants, but none have yet been built in the u. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr.
Fresnel reflector definition of fresnel reflector by the. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system. A fresnel lens is a flattened version of a convex lens. It is intended to be a lowcost solar thermal energy system for medium to largescale thermal energy capture. Washington state university extension energy program a free powerpoint ppt presentation displayed as a flash slide show on id. Compact linear fresnel reflector clfr power plant technology. Thermal analysis of the performance of linear fresnel solar. Mar 25, 2014 compact linear fresnel reflector technology by cnim concentrating solar power plant cnim groupe. Southwest and contiguous parcels of dry, flat land. Compact linear fresnel arrays solar thermal power generation ready to take off. These mirrors are capable of concentrating the suns energy to. Parallel mirrors at ground level focus light onto a linear radiationabsorber positioned above them. Singh carried out experiments to study the temperature of the.
Its goal is to provide highpressure steam from a system configuration that is cheaper than other designs. Pdf project proposal for a compact linear fresnel reflector solar. 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. A fresnel lens uses the crosssections of the curvature of a convex lens, but flattens them onto planar surface. The design of a smallscale concentrator was optimised using the simulation. Compact linear fresnel solar thermal power generation. The system uses parallel rows of mirrors lined up underneath a long, elevated. The linear fresnel reflector lfr concept uses a set of long mirror facets that reflect light to a linear receiver where it can be directly absorbed by the receiver 3 or concentrated a second time with a compound parabolic reflector 4. Evaluating energy efficiency and economic effect of heat. Compact linear fresnel reflector the solar eclipse.
Concentrating solar power commercial application study. Material and component specifications linear fresnel reflector. 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. A second linear concentrator technology is the linear fresnel reflector system. Solar death ray water aqua lens with kilowatt heat energy grid free energy duration. Results and comparison from the sam linear fresnel. A trapezoidal cavity absorber for a linear fresnel reflector concentrator is analyzed and optimized via cfd simulation. Stela world stecsp technologies linear fresnel reflector. Fresnel the tilting linear system the kimberlina solar thermal power plant with clfr technology compact linear fresnel reflector, which uses an array consisting of many parallel fresnel collectors with flat mirrors, is situated in the californian city of bakersfield in the united states. Clfr individual reflectors can have the option of directing reflected solar radiation to at least two absorbers in linear systems. The clfr solar steam generators are simple, durable, and scalable, and relatively quick to install. Optical design of compact linear fresnel reflector systems.
18 829 852 344 911 1554 485 1419 1022 557 9 1192 956 257 975 20 420 352 425 316 892 1136 1134 395 1473 1289 1560 1235 1033 1032 1114 1074 373 328 826 689 928 379 1425 615 809 721 828 1469