Comparative study of the optical and economic performance. System modelling of the compact linear fresnel reflector. 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. Linear fresnel systems and the future for concentrated.
What links here related changes upload file special pages permanent link page information wikidata item cite this page. Building integration of concentrating systems for solar. Linear fresnel 100 450oc, medium commercial maturity non removing the need for a moving receiver and flexible couplings, the linear fresnel system is similar to a trough concentrator in that it provides heat over the same temperature range. The first three of these technologies use the heat collected from the sun. Designed to be fit into a groove machined on the mounting surface.
Introduction the third technology to be introduced is compact linear fresnel reflector or known as concentrating linear fresnel reflector clfr. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system. Steamcircuit model for the compact linear fresnel reflector. The angle between mirror and horizontal axis direction is, and the location position of reflected rays on collector tubes is if the mirror rotation center is located on the center of mirror. 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.
The offpeak etendueconserving compact linear fresnel field reaches a peak geometric intercept factor of 92%, while the suntracking etendueconserving field and flat field had a peak geometric intercept factor of 83% and 79% respectively. 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. Comparative study of the optical and economic performance of. The following 3 files are in this category, out of 3 total. Parabolic troughs are the most commercially available technology.
Concentrating solar collectors portland state university solar engineering spring 2008 carolyn roos, ph. The following picture shows such a lighthouse fresnel lense. 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. These modular reflectors focus the suns energy onto elevated receivers, which consist of a system of tubes through which water flows. Master thesis the potential of fresnel reflectors for. Cnim is a specialist in the construction of complex nonfossil energy power plants waste, biomass. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email. These mirrors are capable of concentrating the suns energy to. Pdf compact linear fresnel reflector solar thermal powerplants. 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. Compact linear fresnel reflector clfr power plant technology. There are four main types of concentrating solar power systems. The project will use compact linear fresnel reflector clfr technology to capture solar energy and convert water to superheated steam through multiple solar steam generators ssgs. 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.
Convert linear fresnel lens to a spot fresnel lens greenpowerscience. Flt linear fresnel collector manufacturer soltigua. Feasibility studies and industry technology demonstrations cara libby project manager silicon valley photovoltaics society. Report and recommendation of the president to the board of. Modelling of cavity receiver heat transfer for the compact linear fresnel reflector. Concentrating solar power and water use ced engineering. The compact linear fresnel reflector clfr uses a design with two parallel receivers for each row of reflectors a configuration that minimizes blocking of adjacent reflectors and reduces required land area. A compact linear fresnel reflector clfr also referred to as a concentrating linear fresnel. Fresnel reflector an overview sciencedirect topics. Parallel mirrors at ground level focus light onto a linear radiationabsorber positioned above them. 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. Long, semi flat mirror strips in parallel rows track the sun independently, to focus direct beam. 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.
G dispatchability is typically achieved by decoupling solar thermal collection and power production with a thermal energy storage system. Linear fresnel reflector based solar radiation concentrator. The total energy demand of mena is small compared to other regions. Mechanical and mechatronic engineering, stellenbosch university, private bag x1, matieland. Pdf a linear fresnel reflector as a solar system for. This project uses a concentrated solar power technology known as compact linear fresnel reflector clfr from areva solar inc. Feasibility studies and industry technology demonstrations. Pdf this paper evaluates compact linear fresnel reflector clfr concepts suitable for large scale solar thermal electricity generation.
Compact linear fresnel reflector photo courtesy of areva solar clfr uses the principles of curvedmirror trough systems, but with long parallel rows of lowercost flat mirrors. The stage 1 array and tower line produced by shp at the liddell power plant site. It uses flat mirrors as opposed to parabolic mirrors that are used in solar parabolic troughs. The array technology used in this project is of the linear fresnel type and was originally developed at the university of sydney mills and morrison,1999. Linear fresnel and power tower technologies are presently being planned as commercial plants, but none have yet been built in the u. 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. 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. Csp specific conditions to produce power, such as areas where direct sunlight is most intense e. A fresnel lens uses the crosssections of the curvature of a convex lens, but flattens them onto planar surface. To address water limitations and environmental regulations, air cooling can be used for. 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. Numerous mirrors are used to absorb the solar energy and transfer it to the absorber which built correspondingly with the reflectors.
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. Compact linear fresnel reflector solar thermal powerplants article pdf available in solar energy 683. 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. 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 design of a smallscale concentrator was optimised using the simulation models. The compact linear fresnel reflector is a solar thermal energy system currently. 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. Modelling of cavity receiver heat transfer for the compact. 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. Fresnel reflector synonyms, fresnel reflector pronunciation, fresnel reflector translation, english dictionary definition of fresnel reflector. These systems lower cost and increase output by using absorbers that share mirrors.
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. Pdf compact linear fresnel reflector solar thermal. Its light structure, compact dimensions and innovative design make it an ideal rooftop solution. Fresnel reflector definition of fresnel reflector by the. A linear fresnel reflector as a solar system for heating water. 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. Material and component specifications linear fresnel reflector. This product is optimally applicable to machines required for high positioning accuracy, repeatability and rigidity.
Distributed concentrator for solar power generation. Compact linear fresnel reflector clfr technology is, in effect, a second type of solution for the fresnel reflector field problem which has been overlooked until now. Soltiguas fresnel collector flt is a linear concentrating system for generating heat in the range of 100 kw to several mw at temperatures up to 320c. Compact linear fresnel reflector the solar eclipse. Technologies, cost, and performance 5 sunshot vision study february 2012 101 power towers use heliostatsreflectors that rotate about both the azimuth and elevation axesto reflect sunlight onto a central receiver. Pdf solar thermal electric plants without storage are being developed that use low cost compact linear fresnel reflector clfr solar array. 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. Solar heating and cooling solar heating and cooling technologies collect thermal. 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. Parabolic trough linear fresnel reflectors how they work solar. The classical linear fresnel system has only one linear absorber on a single linear tower, and therefore there is no choice about the direction of orientation of a given reflector.
Linear fresnel reflectors use long, thin segments of mirrors to focus sunlight onto a fixed absorbed at a common focal point of the reflectors. Compact linear fresnel reflector technology by cnim. 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. Its goal is to provide highpressure steam from a system configuration that is cheaper than other designs. Compact linear fresnel reflector how is compact linear.
Modeling linear solar collectors of the fresneltype. Fresnel lens prisms that make up a fresnel lens bend and magnify light rays, creating a single, concentrated beam of light. Another advantage is that, depending on the position of the sun, the reflectors can be alternated to point at different receivers. In figure 2, the sunlight irradiates to the center of mirror at space vector of elevation angle and azimuth angle. Compact linear fresnel reflector solar thermal powerplants. Linear fresnel systems and the future for concentrated solar. Pdf solar thermal electric plants without storage are being developed that use low cost compact linear fresnel reflector clfr solar array technology. A stirling solar dish, or dish engine system, consists of a standalone parabolic reflector that concentrates light onto a receiver positioned at the reflectors focal point. Stela world stecsp technologies linear fresnel reflector. Although of low architectural integrability, as the systems described previously, they are the first references of this kind of linear concentrators. From then on, lots of research was gradually carried out. Southwest and contiguous parcels of dry, flat land. It is intended to be a lowcost solar thermal energy system for medium to largescale thermal energy capture.
Mar 25, 2014 cnim is a specialist in the construction of complex nonfossil energy power plants waste, biomass. The compact linear fresnel reflector clfr, shown in figure 1 is a concept for a largescale solar thermal power plant. Concentrating linear fresnel reflectors can be used in either large or more compact plants. 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 parabolic trough shape is simulated by several flat reflectors at different positions, in order to make the sunlight reflect to the receiver tubes fixed on the top of. Solar heating and cooling technologies collect thermal energy from the sun and use this heat to provide hot. 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 compact linear fresnel reflector clfr also referred to as a concentrating linear fresnel reflector is a specific type of linear fresnel reflector lfr technology. Compact linear fresnel reflector how is compact linear fresnel reflector abbreviated. 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. 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.
Design and analysis of rooftop linear fresnel reflector. Pdf modelling of cavity receiver heat transfer for the. Linear fresnel reflector how is linear fresnel reflector. The three fields are then compared on the basis of performance. Design and analysis of rooftop linear fresnel reflector solar.
Optical design of compact linear fresnel reflector systems. Washington state university extension energy program a free powerpoint ppt presentation displayed as a flash slide show on id. Design and analysis of rooftop linear fresnel reflector solar concentrator k. Compact linear fresnel reflector solar systems a linear fresnel reflector is another type of solar power collector. Convert linear fresnel lens to a spot fresnel lens greenpowerscience duration. The steam produced will be used to drive a steam turbine which will produce electricity. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr. Alternatively, an innovative concept of compact linear fresnel reflector clfr system with multiple receivers is developed to minimize energy losses as depicted in fig. During 1961, clfr was invented by giovanni francia in italy. Underlying principle the linear fresnel reflector is made up of multiple mirrors. A fresnel system can be designed with a stationary absorber so that a highpressure direct steam generating absorber does not need flexible couplings.
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