A program for heat balance design, offdesign simulation, and cost estimation that helps to quickly and effectively carry out these three key development steps is the focus of this paper. The software tonatiuh is used to generate a random solar radiation and to calculate the quantity of rays reflected by the primary mirror field and focused onto the. It has lower optical performance and thermal output but this is offset by lower investment and operation and maintenance costs. Apros dynamic simulation software is used to configure and simulate the solar field. Alternatively, an innovative concept of compact linear fresnel reflector clfr system with multiple receivers is developed to minimize energy losses as depicted in fig. Pdf dynamic model development of linear fresnel solar field. Parabolic solar trough concentrators and a linear fresnel concentrators are similar. Fresnel lens what is it, testing focal length, solar heat generated. Optimization of a linear fresnel reflector applying. A linear fresnel reflector works by utilizing the fresnel lens effect which was first developed by french physicist augustinjean fresnel. A fresnel based light uses a glass lens and a metal housing to hold and support the lamp and electronics, therefore size, cost and portability play important factors in the ability to use this lightshaping tool. Led simulation reflector lenses led reflector and lens simulation using tracepro illumination design and analysis software 3 light source models can run the gamut from simple to complex. Conventional linear fresnel reflector system only contains.
The performance of the system depends on the design parameters, mass flow rate, etc. The design equations consider, among others, a coupling between the angles and distances of the mirrors and the required geometrical parameters for the construction of the cpc secondary reflector. The fresnel system also provides a semi shaded space, which may be particularly useful in desert climates for agriculture. Linear fresnel reflector lfr also based on solar collector rows or loops. Linear fresnel reflectors use long assemblies of flat mirrors to focus sunlight onto fixed absorber pipes located above them, thus capable of concentrating sunlight to as high as 30 times of its original intensity figures 1 and 2. Key design variants linear fresnel reflector is currently available in only one design and being marketed by kgds renewable energy pvt. Reflector lens with perfect shape lens with flattened shape with 10 degree slope. A linear fresnel reflector solar collector uses long tracking reflector rows to overlay reflected images of the sun upon a linear downwardfacing thermal receiver for the generation of steam. Nevertheless, only few researches have been conducted to evaluate optical design and performance of the clfr system. Secondary optics design considerations for superflux leds. Design and analysis of rooftop linear fresnel reflector solar. Tutorials for photopia for solidworks optical design software design a fresnel lens inside of solidworks using photopias parametric optical design tools to create a nonimagning and illumation based optical design. Linear fresnel systems and the future for concentrated solar power. It is similar to parabolic trough system but contains fixed receiver pipe while mirrors track.
This book offers a complete guide to designing linear fresnel reflector systems for concentrating solar radiation. The most common designs are linear fresnel reflector lfr and compact linear fresnel reflectors clfr. Computer simulation of linear fresnel reflectors youtube. This study presents a detailed optical comparison between three representative csp collector designs including linear fresnel, parabolic trough, and centralreceiver technologies. Effects of mirror geometry on the optical efficiency of a. Open hardware solar concentrator linear fresnel reflector. Tiago osorio heimsath, simon schneider, daniel benitez.
This mirror based system uses the same principle as a fresnel lens. This software is still being developed by the national renewable energy centre of spain cener with the former collaboration of the university of texas at brownsville utb, and the support of the national renewable energy laboratory nrel. Optimized design of a linear fresnel reflector for solar. Design and analysis of a highefficiency, costeffective.
The fresnel reflectors concentrate beam radiation to a stationary receiver. In this tutorial you will design a narrow beam fresnel lens using the parametric optical design tools podt and the cree cxb18303000k cob led. Design and machining of fresnel solar concentrator surfaces 365 figure 15 optical simulation. Pdf progress in the design and the applications of linear fresnel. Design and machining of fresnel solar concentrator surfaces. Compact linear fresnel reflector solar systems a linear fresnel reflector is another type of solar power collector. Osa optical aspects of linear fresnel reflector design. The reflector is rotated to track the suns movement, and its.
A compact linear fresnel reflector clfr also referred to as a concentrating linear fresnel. Linear fresnel reflector is a solar concentrating technology with concentration ratio in the range of 10 to 50. Design a fresnel lens photopia optical design software. 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. Theoretical elements for the design of a small scale linear fresnel re. Compact linear fresnel reflector clfr power plant technology. In a parabolic solar trough concentrator, the crosssection of the reflector is parabolic, whereas in a linear fresnel concentrator the reflector has fresnel shape it is a continuous surface of a parabolic crosssection of the same curvature, with stepwise discontinuities between them. The solar thermal power plant uses a standard linear fresnel optical design not clfr and has an electrical capacity of 1. The receiver consists of two stainless cpc reflector that directs beam radiation on to the absorber tube. System modelling of the compact linear fresnel reflector. Energy3d simulations of linear fresnel reflector solar power plants around the world. 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. Linear fresnel reflector systems design parameters.
A typical lfr uses modular, flat mirrors that track the sun. The motional design and analysis for linear fresnel reflector. Secondary optics design considerations for superflux leds introduction secondary optics are those optics which exist outside of the led package, such as reflector cavities, fresnel lenses, and pillow lenses. Design and analysis of rooftop linear fresnel reflector solar concentrator k. The radiation is reflected and concentrated onto fixed linear receivers mounted over the mirrors, combined or not with secondary concentrators. The linear fresnel solar collector is an attractive alternative. The lfr has segmented primary reflectors which are placed close to the ground. Introduction solar reflectors are significant tools to concentrate the solar. This combined optical system concentrates sunlight and converts it into thermal energy. The ose solar concentrator programs and designs are licensed under the gpl v2, gpl v3 or attributionsharealike 4. Optical design and concentration characteristics of linear. Linear fresnel reflector, simulation model, receiver tube, incident angle modifier, concentrator efficiency 1. 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 solar field is featured in each model, along with turbines, heat exchangers, cooling systems, etc. Stecsp technologies linear fresnel reflector stela world. The accuracy of the simulation is directly influenced by the quality of the measured data. Linear fresnel reflectors lfr are also based on solar collector rows or loops. Design parameters optimization and theoretical performance. Recent developments have focused on smaller units to supplement thermal power stations and to provide heat for industrial processes. 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. Mills, optical aspects of linear fresnel reflector design, in optics and photonics for advanced energy technology, osa technical digest cd optical society of. The simplest led source model is a point source where all rays are emitted from a single point. A conventional linear fresnel solar concentrator comprises reflectors that may. Jie he et all have developed an optical design of a lfsc 16. The collectors in a linear fresnel system are made up of a large number of mirror. Jul 15, 2017 figure 4 shows a configuration of a compact linear fresnel reflector with two absorber pipes, positioned to the east and west of the reflector arrays, respectively.
Jan 24, 2015 compact linear fresnel reflector technology by cnim. Concentrating solar collectors use shaped mirrors or lens to provide higher temperatures that flat plate collectors. Modeling linear fresnel reflectors in energy3d charles xie. Linear fresnel reflector based solar radiation concentrator. It typically comprises of a single receiver tower and several linear mirror elements. Its light structure, compact dimensions and innovative design make it an ideal rooftop solution. The trough shape is split into multiple mirror facets. Enduse applications linear fresnel reflector is used for the low to medium process heat applications. Its a major update that includes design changes, more detail, lessons learned and more.
In linear fresnel systems, as with parabolictrough collector systems, solar radiation is concentrated onto a line and can be coupled to steam cycles for electricity generation. Optical performance assessment of a small experimental prototype. These systems have been developed with the aim of attaining a simpler design and at less cost than the parabolictrough systems. Optimized design of a linear fresnel reflector for solar process heat applications. The entire optical system is enclosed in a sealed glazed casing. For the full details of the design theory of the fresnel linear solar center. It uses flat mirrors as opposed to parabolic mirrors that are used in solar parabolic troughs. Performance analysis of the solar linear fresnel reflector. Compact linear fresnel reflector a concentrating scheme using. Linear fresnel reflectors use long assemblies of flat mirrors to focus. This concentrated light energy is then converted into thermal energy to heat a fluid in the pipe to a very high temperature. 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. Taking as representative technologies for linefocus concentrators the parabolic trough collector and the linear fresnel reflector collector, two exemplary cases with predefined conditions geometry, sun model and.
Optical design of compact linear fresnel reflector systems. With two absorber pipes, the reflectors may be overall closer to the absorbers, but the downside is increased blocking losses for each reflector figure 5. These mirrors are capable of concentrating the suns energy to. Linear fresnel reflector systems for solar radiation. Linear fresnel systems and the future for concentrated. The methods adopted in the optical study of linear fresnel reflectors are divided. The fresnel design uses less expensive reflector materials and absorber components. Pdf progress in the design and the applications of linear. This tutorial assumes you know how to setup and run a photopia analysis inside of solidworks. They typically use a set of long flat or slightly curved reflective elements of equal or varying width mounted on trackers.
A construction design geared toward factory assembly leading to reduced field. Linear fresnel reflector lfr is one of the major concentrating solar systems. Analytic optical design of a linear fresnel solar collector. 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. In this paper efforts are being made to design a rooftop linear fresnel reflector solar concentrator lfrsc system. Compact linear fresnel reflector technology by cnim concentrating solar power plant cnim groupe. Collectors based on the linear fresnel reflector design are leading the pack. Patented mirror support design for an easy local construction 2. 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. A second linear concentrator technology is the linear fresnel reflector system. The polaroid sx70 camera used a fresnel reflector as part of its viewing system. In tracepro program, flat mirrors are assigned with reflectance of 95% and receivers are defined with absorptance of 0. Optical design and concentration characteristics of linear fresnel reflector solar concentratorsii. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.
There is a gap in the market between nonconcentrating rooftop collectors used for solar heating and large scale systems used for bulk electricity generation. A linear fresnel collector includes a lowprofile reflector array and a receiver assembly with one or more absorber tubes and an optional secondary reflector. Linear fresnel reflector how is linear fresnel reflector. It includes theoretical analyses, computational tools and mathematical formulae to facilitate the development, design, construction and application of these systems. Underlying principle the linear fresnel reflector is made up of multiple mirrors. Fresnel reflector an overview sciencedirect topics.
Concentrated solar power systems have until recently focused on bulk electricity production, with the main focus on solar towers and trough type collectors. 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. Solarpaces is a program of the international energy agency, and the database includes csp plants that are operational, under construction, and under development. Material and component specifications linear fresnel reflector. View and large format cameras can utilize a fresnel lens in conjunction with the ground glass, to increase the perceived brightness of the image projected by a lens onto the ground glass, thus aiding in adjusting focus and composition. Stela world stecsp technologies linear fresnel reflector. Theoretical elements for the design of a small scale linear fresnel. A linear fresnel reflector s design is based on a principle between the power tower and parabolic trough concentrator systems. The design and formulation of an entire linear fresnel solar field in apros is. Aug 31, 2019 the linear fresnel reflector lfr is a concentrating solar thermal power csp technology, which benefits from a relatively simple and lowcost design. The principal design flaw, however, is that shading is produced from adjacent reflectors, lowering the overall output of the system.
The computeraided design cad files and all associated content. A linear fresnel reflectors design is based on a principle between the power tower and parabolic trough concentrator systems. Theoretical elements for the design of a small scale. The program takes into account the reflection of the refracted rays as well as the. Csp technology considered in this paper, linear fresnel reflector lfr, is a. Optical design and concentration characteristics of. A linear fresnel reflector is constructed by taking equal width strips out of a parabolic mirror and translating the strips on to a horizontal surface in such a way that all the strips have bases with the same y coordinate. The principle of this lens is the breaking of the continuous surface of a standard lens. Optical models are implemented in soltrace, which is raytracing software developed at the national renewable energy laboratory. 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 set of design equations were used to build the linear fresnel reflector geometries of each one of the individuals per generation. Introduction linear fresnel reflector lfr is a linefocusing system. Flt linear fresnel collector manufacturer soltigua. However, in this case, the parabolic shape is achieved by almost flat linear facets. The design of a receiver assembly is critical to the performance of a linear fresnel collector. 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. 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 fresnel design uses less expensive reflector materials and absorber. 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 18 th century. Design and analysis of rooftop linear fresnel reflector. Progress in the design and the applications of linear. 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. In order to evaluate different available software tools a comparison study was conducted. Optical design and concentration characteristics of linear fresnel reflector solar concentratorsi. Evaluation and comparison of an adaptive method technique for. Linear fresnel reflector systems are characterized by simple design and low construction and maintenance costs.
In addition, it is useful for both thermal and electrical applications. An optical performance comparison of three concentrating. 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 tracker design will be firmly based on the lessons weve learned over the past 30 years for. The design of linear fresnel solar collectors lfsc follows the principle of the fresnel lens. 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. Linear fresnel collectors a technology overview sfera summer school 2012 june 28, 2012, almeria, spain jan fabian feldhoff email. Analytic optical design of a linear fresnel solar collector journal of. 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. Technologies include parabolic trough, linear fresnel reflector, power tower, and dishengine systems. Linear fresnel reflector an overview sciencedirect topics. Evaluation and comparison of an adaptive method technique.
Linear fresnel systems and the future for concentrated solar. It is also important to state the design with fresnel lenses is not. These systems lower cost and increase output by using absorbers that share mirrors. The ingenious design of the aluminum beverage can duration. Mar 28, 2018 energy3d simulations of linear fresnel reflector solar power plants around the world.
Compact linear fresnel reflector technology by cnim. A205 secondary optics design considerations for superflux leds application rief 2015 lumileds holding all rights resered. The motional design of linear fresnel reflector system combined threemovement. Linear fresnel reflector is a so lar concentrating technology with concentration rat io in. The largest fresnel based lights used for photography and cinema have a diameter of 24 inches.