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. Solar power generation technologies are categorized as concentrated solar thermal power csp and photovoltaic pv. Linear fresnel reflector system comprises of the following components. 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. Compact linear fresnel reflector as a basic fresnel system is scaled up, the spacing between the outer lines of mirrors must be increased to avoid shading. The following picture shows such a lighthouse fresnel lense. Linear fresnel reflector lfr technology is a line focus model within the concentrated solar power field. In this paper, simulation of a linear fresnel rooftop mounted concentrating solar collector is presented. Arevas compact linear fresnel reflector clfr system is a csp power generation technology which compares favorably with other technologies in terms of its land efficiency and environmental impact. 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.
Large scale and small scale applications of the fresnel technology. 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. Material and component specifications linear fresnel reflector. These mirrors are capable of concentrating the suns energy to. Linear fresnel reflector based solar radiation concentrator.
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. Linear fresnel reflector lfr solar power generation fig. Parallel mirrors at ground level focus light onto a linear radiationabsorber positioned above them. This paper is focused on small scale linear fresnel reflectors. Steamcircuit model for the compact linear fresnel reflector. Linear fresnel reflector clfr solar array technology already. Compact linear fresnel reflector sun is the future.
Optical design of compact linear fresnel reflector systems. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email. But parabolic trough reflector performance is still superior. Many fresnel power plants are currently suppliers for heat generation and electricity sector 10. A fresnel lens is a flattened version of a convex lens. 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. Fresnel lens prisms that make up a fresnel lens bend and magnify light rays, creating a single, concentrated beam of light. Solel is constructing a 553mw complex of parabolic. Compact linear fresnel reflector solar thermal powerplants. 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. Design and analysis of rooftop linear fresnel reflector solar concentrator k. Linear fresnel solar thermal system power station manufacturer.
A fresnel system can be designed with a stationary absorber so that a highpressure direct steam generating absorber does not need flexible couplings. The linear fresnel solar thermal system has a rectangular mirror field made up of a number of horizontal reflectors with one rotatig shaft. Linear and spot lenses look similar in terms of the circular fresnel pattern but a spot lens may appear more transparent. Pdf project proposal for a compact linear fresnel reflector solar. Linear fresnel systems and the future for concentrated solar.
Alternatively, an innovative concept of compact linear fresnel reflector clfr system with multiple receivers is developed to minimize energy losses as depicted in fig. Cost estimation relationships of a small scale linear fresnel reflector. 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. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr. Advantage of compact linear fresnel reflector fresnel system requires only the flat or lessshaped mirrors because flat mirrors are cheaper and can bent. 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. Parabolic trough linear fresnel reflectors how they work solar.
It encompasses parabolic troughs, heliostat fields, linear fresnel reflectors, parabolic dishes. Insolation 500 wm2, temperature at receiver, out of focus. Stela world stecsp technologies 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. For the love of physics walter lewin may 16, 2011 duration. It is intended to be a lowcost solar thermal energy system for medium to largescale thermal energy capture. 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 optimal linear fresnel reflector nn individual presents an increase of 2. The principle of this lens is the breaking of the continuous surface of a standard lens.
Linear fresnel 3 4 solar concentrating heat collection system, for its own compact structure, ease of manufacture, low price and other associated benefitsin the field of solar energy, is put to a widespread use. These systems lower cost and increase output by using absorbers that share mirrors. Fresnel reflector an overview sciencedirect topics. Modelling of cavity receiver heat transfer for the compact. Compact linear fresnel reflector solar thermal powerplants article pdf available in solar energy 683. Jan 24, 2015 compact linear fresnel reflector technology by cnim. 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. Compact linear fresnel reflector how is compact linear. The system is modeled with the transient system trnsys simulation program using the typical meteorological year file containing the weather parameters of four different cities in australia.
The source four 7 fresnel by etc combines the classic fresnel design with efficient hpl lamp technology and advanced reflector design to offer a 750w luminaire with a lumens rating equal to other w fixtures. 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 compact linear fresnel reflector technology uses reflected sunlight to heat liquidfilled tubes which generate highpressure steam that produces electricity via turbines. These mirrors are capable of concentrating the suns energy to approximately 30 times its normal intensity. Compact linear fresnel reflector clfr power plant technology. Compact linear fresnel reflector 10 kw, test iii, by dr. Pdf a linear fresnel reflector as a solar system for. There are three types of fresnel lenses, linear, spot, and continuous linear. Its goal is to provide highpressure steam from a system configuration that is cheaper than other designs. Parametric study of the small scale linear fresnel re. Linear fresnel reflector an overview sciencedirect topics. The compact linear fresnel reflector is a solar thermal energy system currently at prototype stage in australia. Transient modelling of cavity receiver heat transfer for the compact 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. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system. Arevas compact linear fresnel reflector technology helioscsp. Parametric study of the small scale 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. Design and analysis of rooftop linear fresnel reflector solar. 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 reflectors use long, thin segments of mirrors to focus sunlight onto a fixed absorbed at a common focal point of the reflectors. Pdf compact linear fresnel reflector solar thermal powerplants. Fresnel lens what is it, testing focal length, solar heat generated. During 1961, clfr was invented by giovanni francia in italy. Whereas the insertion of copper could reduce these stresses and provide greater heat transfer.
Which is the best solar thermal collection technology for electricity. 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. Fresnel reflector definition of fresnel reflector by the. Energy flux distribution and thermal performance of linear. System modelling of the compact linear fresnel reflector. Optical characteristics of linear fresnel collectors lfc. 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. Compact linear fresnel reflector technology by cnim. Pdf modelling of cavity receiver heat transfer for the. A linear fresnel reflector works by utilizing the fresnel lens effect which was first developed by french physicist augustinjean fresnel. This paper evaluates compact linear fresnel reflector clfr concepts suitable for large scale solar thermal electricity generation plants. 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.
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. Modelling of cavity receiver heat transfer for the compact linear fresnel reflector. 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 compact linear fresnel reflector clfr, shown in figure 1 is a concept for a largescale solar thermal power plant. Arevas compact linear fresnel reflector technology uses mirrors to concentrate sunlight to directly create steam power. 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.
Oct 05, 2011 insolation 500 wm2, temperature at receiver, out of focus. Compact linear fresnel reflector the solar eclipse. The tower height and spacing have been recently reduced to 7. While lfr technology is cheap and easy to maintain, it generally has lower associated efficiencies. The clfr solar steam generators are simple, durable, and scalable, and relatively quick to install.
Novatec solar and areva solar, the markets leading fresnel providers, share their latest technology developments. Irjet performance analysis of the solar linear fresnel reflector. 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. Fresnel reflector synonyms, fresnel reflector pronunciation, fresnel reflector translation, english dictionary definition of fresnel reflector. A second linear concentrator technology is the linear fresnel reflector system. This is largely due to the optical losses associated with a discontinuous mirror field 1, as adjacent. In 2000, mills and morrison developed the compact linear fresnel solar reflector concept, using several stationary absorbers spared between the mirror rows. Numerous mirrors are used to absorb the solar energy and transfer it to the absorber which built correspondingly with the reflectors. Steamcircuit modelling of the compact linear fresnel reflector. Based on mills and morrison 11 technology ariva solar formerly. Life cycle analysis of linear fresnel solar power technology. Trnsys modeling of a linear fresnel concentrating collector. On top of the receiver, a small parabolic mirror can be attached for further focusing the light.
Underlying principle the linear fresnel reflector is made up of multiple mirrors. The first prototype of a linear fresnel reflector concentrator was built in 1964 in italy. Linear fresnel reflector how is linear fresnel reflector. Theoretical elements for the design of a small scale linear fresnel. 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. A fresnel lens uses the crosssections of the curvature of a convex lens, but flattens them onto planar surface. Spot lenses produce a very small tight focal pattern at the optimal focal length and. 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. Compact linear fresnel reflector linear fresnel reflectors use long, thin segments of mirrors to focus sunlight onto a fixed absorber located at a common focal point of the reflectors.
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