The necessity of moving the concentrator to accommodate the changing solar orientation can be reduced by using a trough with two sections of a. Compound parabolic concentrators channel light energy. As the cpc are different to the conventional concentrating collectors, their principle of working, collector efficiency, construction need to be studied. The geometrical properties and the optical concentration gain are analysed. Rotationally asymmetrical compound parabolic concentrator. Compound parabolic concentrator cpc tipped polymer optical fiber pof. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. Us20090188562a1 fintype compound parabolic concentrator. They have the capability of reflecting to the absorber all of the incident radiation within wide limits. Pdf thermodynamics and the segmented compound parabolic. An oversized pdf file can be hard to send through email and may not upload onto certain file managers. Coupling a dielectric compound parabolic concentrator dcpc to an absorber across a vacuum gap by means of frustrated total internal reflection ftir can theoretically approach the maximum concentration permitted by physical laws, thus allowing higher radiative fluxes in thermal applications.
Optiforms manufactures compound parabolic concentrators to your desired specification. Asymmetric compound parabolic concentrator for building integration in the uk with acceptancehalf angles of 0 and 50. Compound parabolic concentrator optical fiber tip for fret. One of the fun things about computers is playing with programs like paint. A coordinate transformation is used to map the parabolic shape into a rectangular domain where the governing equations are solved. The cpc tip can concentrate the excitation light as well as increase the numerical aperture, even when being only a few hundred micrometers long. Pdf nonconcentrating and asymmetric compound parabolic. Elliptical reflectors offaxis parabolic reflectors oap. A lot of work has been done in the field of compound parabolic concentrator by rabl and kreith. This paper presents a comparison between the fluid outlet temperature and efficiency of the system for two.
Also because of its large aperture area, only intermittent tracking is required. The kp5pdc5c1 is a 1foot, 24 dbi parabolic antenna operating from 4. Studies based on the optimal parameters of these concentrators are performed. Their potential as collectors of solar energy was pointed out by winston 1974. Pdf some features of the compound parabolic concentrator. Cpcs should have a gap between the receiver and the reflector to prevent the reflector from acting as a fin conducting heat away from the absorber. Compound parabolic concentrator diagram electroformed compound parabolic concentrators are used to efficiently collect and concentrate light from a distant source. Compound parabolic collectors cpcs are nonimaging concentrators that ideally accept all rays within their acceptance half angle and concentrate by the maximum allowed for by the second law of thermodynamics. In the present article, six symmetric compound parabolic solar concentrators cpcs with allglass evacuated solar tubes est as the. These factors included 1 the desire for an optical acceptance halfangle of 23.
Not least of these benefits is the fact that solar energy is an environmentally sustainable alternative. For absorbers, the main issues lie in manufacturing. It provides significant gain within its acceptance angle, up to 6. Theoretical study of the compound parabolic trough solar. Optical performance and optimization of two stationary. For solar tracking applications, cpcs offer the possibility of high solar concentration ratios, in. Collimates a light source or concentrates light from distant sources. Design optimisation of compound parabolic concentrator.
Therefore we here propose to use a cpc compound parabolic concentrator polymer fiber tip for fret based glucose sensors in order to increase the florescent signal and improve the signal to noise ratio. The design is intended to increase the angle of acceptance as well as concentration of energy from the sun. Pdf file or convert a pdf file to docx, jpg, or other file format. Mar 06, 2012 a compound parabolic concentrator cpc is a nonimaging concentrator that can concentrate solar radiation coming within its acceptance angle. Mar 09, 2021 compound parabolic concentrators cpcs are a class of concentrators that consist of rotated parabolic sections which have a concentration factor for planar receivers which is the thermodynamic limit. Building integrated compound parabolic photovoltaic. Lc slab in the form of a compound parabolic concentrator enables the output intensity to be increased by a factor. Us4387961a compound parabolic concentrator with cavity for. The compound parabolic concentrator accepts a greater amount of light and needs less accurate tracking.
Schematic architectural studies began with selected active collectors and reflector optics as a starting point 1232. Even though most variations of solar concentrators have been studied or built at some time or other, an important class of concentrators has been overlooked until very recently. Solar concentrator, compound parabolic concentrator, sanitization, sterilization, cpc, nonimaging concentrators, parabolic concentrators, waste drying 1. The untruncated concentration ratio of the system was 2.
Manufacturing of compound parabolic concentrator devices. Read on to find out just how to combine multiple pdf files on macos and windows 10. This paper presents the experimental investigation of a novel cross compound parabolic concentrator ccpc. Cylindrical parabolic concentrator it consists of a cylindrical parabolic trough reflector and a metal tube receiver at its focal line, as shown in fig. Mar 04, 20 the concept of the compound parabolic concentrator cpc as a primary concentrator has received some attention in the field of building integrated pv, but only for low concentration 5x nontracking applications with few exceptions4,5. In recent years, cpc and its variations like lenswalled cpc li et al. Pdf on mar 31, 2021, aaron glenn and others published implementation and optimization of a luminescent downshifting photovoltaic system for use in a compound parabolic concentrator find, read. Optical performance analysis and design optimisation of. Nonimaging compound parabolic concentrator and parabolic concentrator. To combine pdf files into a single pdf document is easier than it looks. Lyngby, denmark abstract the compound parabolic concentrator. Compound parabolic concentrator profile is obtained from two simple parabolas. The compound parabolic concentrator cpc is one kind of nonimaging low concentration solar concentrator.
It indicates that the truncated twostage compound parabolic concentrator system enhances the ability of. The concentration ratio up to 10 can be achieved in the nontracking mode easily. A compound parabolic concentrator with a vshaped cavity is provided in which an optical receiver is emplaced. Compound parabolic concentrators cpcs are designed to efficiently collect and concentrate distant light sources, with some acceptance angle. Since the sun moves continuously, a compound parabolic concentrator cpc can enhance the efficiency of solar cells by lighttrapping and concentration because a cpc minimizes. The focal point for parabola a f a lies on parabola b, whereas the focal point of parabola b fb lies on parabola a. Pdf the compound parabolic concentrator cpc is a highly interesting solar collector technology for different lowconcentration applications. This is a rough lower bound for ease of manual handling during processing. Dec 07, 2020 various structural patterns are used to control light properties during propagation. The receiver tube is blackened at the outside surface to increase absorption. Find compound parabolic concentrator related suppliers, manufacturers, products and specifications on globalspec a trusted source of compound parabolic concentrator information. Development and demonstration of compound parabolic. A generally arcuate bottom reflector having a center line within the common plane is. The two major classifications of solar collectors are namely imaging and non imaging types 1.
Practical development of compound parabolic concentrator compound parabolic concentrators cpc, concentrate radiation from the aperture to the receiver norton et al, 2011 and most of the incoming beam and diffuse radiation can be collected andor reflected onto the absorber surface kessentini and bouden, 20. The collector concept was originated by winston in 1978. Figari published some features of the compound parabolic concentrator find, read and cite all the research you need on. If your pdf reader is displaying an error instead of opening a pdf file, chances are that the file is c. This article explains what pdfs are, how to open one, all the different ways. Compound parabolic concentrator the cpc in twodimensional geometry is formed by two identical and oppositely aligned parabolas truncated at their focal point, as shown in fig. Front length the distance from the focal point to the entrance port end of the concentrator. The segments are oriented such that focus of one is located at the bottom end point of the other in contact with receiver. Su et al 19 made a comparison of a novel lenswalled compound parabolic concentrator lenswalled cpc with the common mirror and dielectric solid cpcs for yearly utilization. The compound parabolic concentrator cpc belonging to nonimaging optics is regarded as a. These novel concentrators have been called ideal because of their optical properties, and an example, the compound parabolic concentrator, is being tested at argonne national laboratory. A low concentration cpc photovoltaic system has the advantages of reduced photovoltaics pvs cell size, increased efficiency and stationary operation. Theoretical design of compound parabolic trough solar collector cpc without tracking is presented in this work. Pdf implementation and optimization of a luminescent down.
Aug 17, 2018 compound parabolic concentrator cpc is a special type of solar collector fabricated in the shape of two meeting parabolas. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. Our parabolic antennas are perfectly suited for high density pointtopoint clientpremises or backhaul applications. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved. A numerical model based on finite differences is developed to solve the mass, momentum, and energy equations. Design and test of nonevacuated solar collectors with compound parabolic concentrators. These concentrators do not have such strict requirements for the incidence angle as the parabolic troughs have, which makes them. Compound parabolic concentrators are critical components in solar energy collection, wireless communication, biomedical and defense research, or. Design and optical performance of compound parabolic. Adobe designed the portable document format, or pdf, to be a document platform viewable on virtually any modern operating system.
These parabolic antennas maximize the potential of your radio by improving signal strength and reducing the noise floor in your link. The results show that surface radiation significantly changes the. Currently, all compound parabolic concentrators cpcs for photovoltaic pv application consist of reflecting surfaces in the form of a parabolic shape. Experimental investigation of a novel absorptivereflective. Polymer optical fiber compound parabolic concentrator fiber. In this study two different compound parabolic collectors with tubular receivers are analyzed and optimized for yearly operation in athens. The heat transfer fluid flows through the receiver tube, carrying. Most electronic documents such as software manuals, hardware manuals and ebooks come in the pdf portable document format file format. A is the focal point of parabola cc and b is the focal point of the parabola dd the area dc is the entrance aperture and the flat absorber is ab. Truncated twostage compound parabolic concentrator for. The cavity redirects all energy entering between the receiver and the cavity structure onto the receiver, if the optical receiver is emplaced a distance from the cavity not greater than 0. Compound parabolic collector an overview sciencedirect. The compound parabolic concentrator cpc is a highly interesting solar collector technology for different lowconcentration.
The acceptance angle of a cpc is associated with its geometrical concentration ratio, by which the size of pv cell could be reduced. Pdf implementation and optimization of a luminescent. Nonimaging optical gain in luminescent concentration through. Dec 31, 2014 a novel rotationally asymmetrical compound parabolic concentrator is presented. Pdf on mar 31, 2021, aaron glenn and others published implementation and optimization of a luminescent downshifting photovoltaic system for use in a compound parabolic concentrator. Apr 04, 2017 however, standard nonimaging concentrators such as the compound parabolic concentrator cpc 2 suffer from aspect ratios that increase with concentration ratio 3, and in many cases dependence. Design slaire test of nonevacuated solar collectors with compound parabolic concentrators. If your scanner saves files as pdf portbale document format files, the potential exists to merge the individual files into one doc. A fourwing compound parabolic concentrator cpc design for. A pdf file is a portable document format file, developed by adobe systems. Solar compound concentrator of electric power generation system. For a 3dimensional nonimaging compound parabolic concentrator, the maximum concentration possible in air or in vacuum equal to the ratio of input and output aperture areas, is.
Polymer optical fiber compound parabolic concentrator tip. This means it can be viewed across multiple devices, regardless of the underlying operating system. A fourwing compound parabolic concentrator cpc design. Nonimaging optical gain in luminescent concentration. Osa dielectric compound parabolic concentrating solar. A fourwing compound parabolic concentrator cpc was designed as a modification of the regular nonimaging cpc concentrator that has a widespread use as solar collector. Even though, compound parabolic concentrators are more popular for medium temperature applications. The compound parabolic concentrators cpc are typical representatives of nonimaging concentrators, which are capable of collecting all available radiation both beam and diffuse and directing it to the receiver. Figure 1 terminology of cpc concentrator the equation of parabola is, 1. A fintype compound parabolic concentrator includes a pair of semi parabolic reflectors arranged on opposite sides of a common plane, the reflectors having a common focal point on the plane and being rotated through an angle defined by a line extending from the apex of each reflector through the focal point. Making and using a compound parabolic solar cooker.
Polymer optical fiber compound parabolic concentrator. Compound parabolic concentrators cpc 12 one of the key parameters in cpc is the acceptance angle q a. Compound parabolic concentrators cpcs are concentrator lenses made from rotated parabolic shapes to create specific accep. Harnessing the freely available source of energy from the sun offers a number of additional benefits. The xcpc was designed to efficiently heat fluid between a 100c 300c range. It is defined as the total angle the sun can move through without its image missing the receiver. Us4387961a compound parabolic concentrator with cavity. Polymer optical fiber compound parabolic concentrator tip for. It belongs to the nonimaging family, but is consider among the collector having the highest possible concentrating ratio.
The two parabolic surfaces are symmetrical with respect to. Furthermore, the total length of truncated twostage compound parabolic concentrator is only about 68 mm while the ellipsoidal mirror is 110 mm. Get an analytical understanding of compound parabolic concentrators. By richard morochove, pcworld practical it insight from tony bradley todays best tech deals picked by pcworlds editors top deals. The compound parabolic concentrator is a nonimaging type concentrator that is able to concentrate rays from the sun from wider angles to smaller absorber surface without the need for tracking the sun. Generate compound parabolic concentrator with involute. The name, compound parabolic concentrator, derives from the fact that the cpc is comprised of two parabolic mirror segments with different focal points as indicated. Design the integrated compound parabolic concentrator icpc is essentially compound parabolic concentrator cpc reflectors shaped into a vacuum tube. In the drawing opposite there are two parabolic mirrors cc red and dd blue. A compound parabolic concentrator cpc is a well known nonimaging concentrator that will concentrate the solar radiation onto receiver pv cell. The paint program can help you make new image files, but it cannot open document or pdf file. Compound parabolic concentrator cpc, ray tracing, optical efficiency, double tube concentrator, tubular receiver. Introduction the energy from the sun is vast, while being commonly available at any point of use.
Find electroformed compound parabolic concentrators cpcs. Although the sun ray falling on the absorber is not focused, there is considerable concentration of sun ray concentration that can be attained with a cpc design. Compound parabolic concentrator cpc compound parabolic concentrator shown in fig. Making and using a compound parabolic solar cooker large. The calculated optical performance of 2d dcpcs with ftir absorbers indicates that the ratio of gap. I paid for a pro membership specifically to enable this feature. The cpc profile is traced by the coordinates y and z, as defined in ref. A batch of 9 cpc tipped pof sensors with a 35 mm fiber length is shown to have an enhanced fluorescence pickup efficiency with an average increment factor of 1. These concentrators do not have such strict requirements for the incidence angle as the parabolic troughs have, which. Compound parabolic collector an overview sciencedirect topics. A novel lenswalled compound parabolic concentrator for. Depending on the type of scanner you have, you might only be able to scan one page of a document at a time. Use of parabolic concentrator for medium temperature application is appreciated by many scientists. As is shown by the comparative calculations of the concentration between a spherical compound cylindrical concentrator and a parabolic trough concentrator truncated to the.
Compound parabolic collectors cpcs are nonimaging concentrators. Rotationally asymmetrical compound parabolic concentrator for. The system consists of a series of evacuated solar thermal absorbers paired with wideangle, nonimaging reflectors that gather and concentrate both direct and indirect sunlight. The pdf format allows you to create documents in countless applications and share them with others for viewing. The new yahoopowered ads for adobe pdf service makes it easy to place payperclick ads in your pdf files. External compound parabolic concentrators pentagonal absorber shape the pentagonal shaped receiver shows to be the most effective for heat transfer and collector design. Design of a parabolic trough solar collector using a.
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