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. Concentrations of the linear fresnel reflector with the. Design and analysis of rooftop linear fresnel reflector solar concentrator k. 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. A compact linear fresnel reflector clfr also referred to as a concentrating linear fresnel. It is intended to be a lowcost solar thermal energy system for medium to largescale thermal energy capture. This report details an analysis of the solar concentration performance of a linefocusing, flat base fresnel lens in the presence of small transverse tracking errors. Parametric study of the small scale linear fresnel re. Linear fresnel reflector based solar radiation concentrator.
Design and analysis of rooftop 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. The principle of this lens is the breaking of the continuous surface of a standard lens. Fresnels equations in optics r 100% laser medium r 90% 0% reflection. An array of linear narrow and long mirrors mounted on an axis which can be rotated to align to the sunlight individually. Optical characteristics of linear fresnel collectors lfc. Pdf a linear fresnel reflector as a solar system for heating water. Theoretical elements for the design of a small scale linear fresnel. Optical fibers only work because of total internal reflection. A new optical optimization model for linear fresnel reflector concentrators is proposed. Real suntracking linear solar concentrators imperfectly follow the solar disc, opera tionally sustaining both transverse and axial misalignments. Design parameters optimization and theoretical performance.
Combining several systems in one significantly decreases the thermal resistance and reduces the. Computer simulation of linear fresnel reflectors youtube. 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. Pdf progress in the design and the applications of linear fresnel. 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.
The linear fresnel solar thermal system has a rectangular mirror field made up of a number of horizontal reflectors with one rotatig shaft. Jan 24, 2015 compact linear fresnel reflector technology by cnim. It is shown that an lfr can operate efficiently for eight. This paper designed a new movement for the linear fresnel reflector system. Linear and spot lenses look similar in terms of the circular fresnel pattern but a spot lens may appear more transparent. There are three types of fresnel lenses, linear, spot, and continuous linear. 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. The reflector strips are moved in a way that they always reflect the sunlight on to the receiver tubes. Its goal is to provide highpressure steam from a system configuration that is cheaper than other designs. Linear fresnel technology may be poised to take centre stage, but its performance needs polishing.
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. These mirrors are capable of concentrating the suns energy to. Spot and linear fresnel lenses both types of lenses can be used for solar cooking and boiling water. A comparative study between parabolic trough collector and linear fresnel reflector technologies. These systems lower cost and increase output by using absorbers that share mirrors. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr.
It is a combined particle swarm optimization algorithm and monte carlo raytracing. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email. Linear fresnel reflector system, light tracking analysis, loss of cosine effect. Linear fresnel reflector uses a single axis tracking system. 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. Designed to be fit into a groove machined on the mounting surface. Compact linear fresnel reflector how is compact linear. Linear fresnel reflector lfr solar power generation fig. Thermal analysis of the performance of linear fresnel solar. An uncertainty u is calculated with a root sum square technique combining these two elements by. A linear fresnel reflector as a solar system for heating water.
Parallel mirrors at ground level focus light onto a linear radiationabsorber positioned above them. Linear fresnel reflector an overview sciencedirect topics. Table 3 parabolic trough linear fresnel integration can be integrated easier into industrial processes with direct steam generation installation can be installed in spaces with very limited maximum length 20 metres easier installation on roofs because of more distributed. By emma clarke linear fresnel technology, a latecomer to the csp market, is about to make its entrance. Pdf this work is concerned with assessing the thermal performances of a solar water heating system which is dependent on a linear fresnel. By heba hashem linear fresnel is a linefocusing technology similar to the parabolic trough in that it consists of reflectors that track the sun in one axis and focus the beam radiation onto fluidcarrying receiver tubes. Arevas compact linear fresnel reflector technology helioscsp. The sunlight is further concentrated by a small linear concave mirror to the evacuatedtube absorber.
Modelling of cavity receiver heat transfer for the compact. Aveek chatterjee1, eva bernal2, satya seshadri1, oliver mayer2, and mikal greaves3. Linear fresnel systems and the future for concentrated. Fresnel reflector an overview sciencedirect topics. This paper presents the new linear fresnel technology performance model in nrels system advisor model. 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. Fresnel lens prisms that make up a fresnel lens bend and magnify light rays, creating a single, concentrated beam of light. Comprehensive examinations prove this new models reliability and efficiency. Fresnel lens what is it, testing focal length, solar heat generated. A novel optical optimization model for linear fresnel. Leveling of land is not necessary and thus less expensive. Linear fresnel reflector how is linear fresnel reflector. 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.
A numerical model of a linear frensel reflector lfr with oriented facets is suggested. Dec 16, 2010 a numerical model of a linear frensel reflector lfr with oriented facets is suggested. Linear fresnel reflectors generally produce steam directly and do away with the requirement of expensive heat exchangers. Arevas compact linear fresnel reflector technology. 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. Land use is less because of efficient use of space. Pdf a comparative study between parabolic trough collector. Lfr linear fresnel reflector solar energy acronymfinder. Linear fresnel reflector lfr is one of the major concentrating solar systems for. 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. Pdf a linear fresnel reflector as a solar system for. Mar 28, 2018 energy3d simulations of linear fresnel reflector solar power plants around the world. Linear concentration of solar energy by multiple flat or slightly curved surfaces basic components. Compact linear fresnel reflector clfr power plant technology.
Clfr individual reflectors can have the option of directing reflected solar radiation to at least two absorbers in linear systems. The following picture shows such a lighthouse fresnel lense. Material and component specifications linear fresnel reflector. 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. 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 the case of parabolic reectors, the position of the feeder is. Fresnel reflector definition of fresnel reflector by the. Acceptance testing procedure for linear fresnel reflector. Figure 3 omitted figure 4 omitted compact linear fresnel reflector clfr use flat reflectors instead of parabolic mirrors, that move on a single axis and fresnel lenses to concentrate the solar thermal energy in collectors figure 4, right. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system.
Compact linear fresnel reflector how is compact linear fresnel reflector abbreviated. Linear fresnel systems and the future for concentrated solar. Stela world stecsp technologies linear fresnel reflector. The compact linear fresnel reflector clfr, shown in figure 1 is a concept for a largescale solar thermal power plant. Jan 14, 2010 but parabolic trough reflector performance is still superior. Conventional linear fresnel reflector system only contains onedimension movement that is flat mirror rotation, and the addition movement in new design includes translating mirror field to decrease cosine effect and rotating the secondary reflector to coordinate the translation of mirror field. The optimal linear fresnel reflector nn individual presents an increase of 2. The concentrating performances of linear frensel reflectors are determined by considering the errors of manufacturing and facet positioning relative to the sun. The potential of new tracking methods combining the existing.
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. It has been a long wait, given the technology was first developed for power generation back in the 1960s. Arevas compact linear fresnel reflector technology uses mirrors to concentrate sunlight to directly create steam power. This product is optimally applicable to machines required for high positioning accuracy, repeatability and rigidity. Linear fresnel reflector system, light tracking analysis, loss of cosineeffect. Thermal analysis of the performance of linear fresnel. Design and analysis of rooftop linear fresnel reflector solar. The motional design and analysis for linear fresnel reflector. Fresnel s equations for reflection and transmission incident, transmitted, and reflected beams boundary conditions.
Results and comparison from the sam linear fresnel technology. The monte carlo raytracing model is redesigned for the annual optical efficiency. It can automatically track the sun to reflect and collect the sunlight into the linear light concentrator that is parallel to the top of the mirror field. Parametric study of the small scale linear fresnel reflector. In the present study, the proposed p2g plant is located near seville, south spain. Pdf linear fresnel reflector based solar radiation. 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. 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. These systems are hybrid collectors by combining ptc and lfr. Compact linear guide lm roller the lm roller is a compact linear guide with high load performance and a mallet type roller able to make infinite circular motions.
Circular fresnel reector with elliptical plate zones. 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. Linear fresnel systems, which are a type of linear concentrator, are active in germany, spain, australia, india, and the united states. But technology developers say recent efficiency improvements now. The motional design and analysis for linear fresnel. Compact linear fresnel reflector technology by cnim.
Linear fresnel reflector based solar radiation concentrator for combined heating and power. The performance of the system depends on the design parameters, mass flow rate, etc. Many lasers use brewsters angle components to avoid reflective losses. This study describes the design and construction of a lowcost linear fresnel solar. 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. Fresnel reflector synonyms, fresnel reflector pronunciation, fresnel reflector translation, english dictionary definition of fresnel reflector. Linear fresnel reflector lfr everything about solar energy. A second linear concentrator technology is the linear fresnel reflector system.
Rational opticalgeometrical parameters of linear frensel reflectors are revealed. Results and comparison from the sam linear fresnel. Linear fresnel reflectors use long, thin segments of mirrors to focus sunlight onto a fixed absorbed at a common focal point of the reflectors. Coupling of a solidoxide cell unit and a linear fresnel. Novatec solar and areva solar, the markets leading fresnel providers, share their latest technology developments. Singh carried out experiments to study the temperature of the. Mixing arched fresnel lenstriplejunction cell cpv array in space in 1998 deep space 1, and this awardwinning array performed as predicted over the full 38month mission, the first space mission to be powered by triplejunction cells. Pdf solar concentrating power is one of the most promising ways of. Optimization of the distribution of small scale linear fresnel. 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. Underlying principle the linear fresnel reflector is made up of multiple mirrors. 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. Acceptance testing procedure for linear fresnel reflector solar. Steamcircuit model for the compact linear fresnel reflector.
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