Since the sun is very far away, the radiation rays that reach a concentrator is parallel to its axis. Parabolic trough solar thermal electric power plants. These pla developed by luz international limited and referred to as solar electric genera systems segs, range in size from 14 80. The collectors reflect the incident solar radiation onto its focal line toward a receiver that absorbs the concentrated solar energy to raise the temperature of the fluid inside it as shown in fig. Giannuzzi 2, adio miliozzi 2 and daniele nicolini 2 1university of padua 2enea agency for new technologies, energy and environment italy. Parabolic trough concentrator the accuracy of the solar tracking depends to a great extent on the solar coordinates at a particular location and at a given instant. About 33% of these are solar collector, 12% are solar energy system. In a parabola all of the incoming rays from a light source in this case the sun are reflected back to the focal point of the parabola. The parabolic trough operates at about 75% efficiency and at 495 square foot can collect approximately 270 kwh 10 hours on a clear day.
Comparative study of geometry of r eceiver of solar parabolic trough concentrator anuj s. The initial installation cost of these parabolic trough solar collectors consti tutes the. China solar vacuum tube manufacturer, parabolic trough. The assumed solar field area in both cases was about 1. It would be attached to a base which would allow for proper angling of the parabolic trough. Parabolic trough solar powered water heater youtube. Parabolic trough solar collector water heater 6 youtube. A wide variety of parabolic solar concentrator options are available to you, such as type, application, and pipe material. A 3d numerical model is developed to evaluate the performance of the receiver with various configurations of porous inserts of square, triangular. Completely self sufficient off the grid, using commonly available materi. Pdf numerical study of porous finned receiver for solar. A linear parabolic trough solar collector performance model.
The experiments have been performed during winter and summer at tikritiraq. Heliostats are tracking mirrors that reflect solar energy onto a fixed target. The design and fabrication of parabolic trough solar water heater for water heating was executed. Parabolic trough collectors are widely used as a solar energy recovery device, with the. This paper reports the design, construction, and evaluation of a solar parabolic trough concentrator ptc with a rim angle of 45, a length of 4. Comparative study of geometry of receiver of solar. The procedure employed includes the design, construction and testing stages. Parabolic troughs are one of the lowest cost solar electric power options available today and have. This type of tube is obviously simple and easily fabricated, but it is not optimal. Design of a parabolic trough solar collector using a concentrator with. I tried to show what a determined person can do with ordinary. Concentrating solar collectors use shaped mirrors or lens to provide higher temperatures that flat plate collectors. Eurotrough parabolic trough collector developed for.
Cylindrical parabolic trough concentrator and solar tower. The sunlight which enters the mirror parallel to its plane of symmetry is. Parabolic trough power plants ptpp are thus far mostly developed csp thermal plants that are operating commercially. It is shown in this article that the optimal shape, assuming a perfect parabolic figure for the concentrating mirror, is instead oblong, and is. The larger collector aperture area concentrates reflected direct solar radiation onto the smaller outer surface of the receiver. Parabolic trough solar concentrators will be considered in. Energy equations for computation of parabolictrough. The solar radiation of tikrit university was calculated theoretically and a theoretical study was performed by using fortran 90 program. This necessitates the need to develop energy equations for computation of.
For nearly 150 years, the cross section of the heat collection tubes used at the focus of parabolic trough solar concentrators has been circular. The equipment which is made up of the reflector surface curved mirror. Because of its singleaxis tracking, all the solar radiations fall parallel to its. This paper is based upon an experimental study of two different parabolic trough collectors which have been designed, fabricated and evaluated to derive a comparison between their performances, in producing hot water, by using a black coated receiver. Proceedings of the 2nd world congress on mechanical, chemical, and material engineering mcm16 budapest, hungary august 22 23, 2016 paper no. In this article a new receiver for parabolic trough concentrator is proposed to enhance heat transfer. Renewable energy resources and a greener future vol.
Parabolic trough concentrators solar thermal energy systems. The fundamental characteristics of the performance of a parabolic trough solar collector are its concentration ratio and its optical efficiency. Us4423719a us06407,106 us682a us4423719a us 4423719 a us4423719 a us 4423719a us 682 a us682 a us 682a us 4423719 a us4423719 a us 4423719a authority us united states prior art keywords parabolic bows channel stressed channels prior art date 19800403 legal status the legal status is an assumption and is not a. The heliostat mirror system of the central tower receiver is, in principle, a special form of parabolic dish. Pdf advances in parabolic trough solar power semantic. A parabolictrough collector ptc is a linearfocus solar collector, basically composed of a parabolic trough shaped concentrator that reflects direct solar radiation onto a receiver or absorber tube located in the focal line of the parabola see fig. Solar parabolic trough uses mirrored surfaces curved in a linearly extended parabolic shape. Us4372027a method of manufacturing parabolic trough. Collection element on the optical performance of a. Abstracteven though most variations of solar concentrators have palmistry guide in urdu pdf been studied or. Parabolictrough solar concentrating systems are parabolic shaped collectors made of reflecting materials. Parabolic trough collector an overview sciencedirect. Each sca is an independently tracking parabolic trough.
Diy parabolic trough solar concentrator provides all the heat for back yard hot tub. The bending of a receiver tube in twophase flow under stratified conditions when water is first introduced to the hot steel receiver of a 14. The simplest parabolic concentrating system is the parabolic trough concentrator. Experimental performance evaluation of a solar parabolic trough collector using solar topocentric coordinates of bauchi nigeria. An experimental and theoretical study has been conducted to determine the thermal efficiency of a parabolic trough solar collector. A photovoltaic unit utilizing parabolic trough concentrator has been realized and tested by ansaldo. Design and fabrication of parabolic trough solar water. Optimal heat collection element shapes for parabolic. Energy equations for computation of parabolic trough. Rated power capacity of the single unit is about 4. Ptc stands for parabolic trough concentrator also positive temperature coefficient and 696 more what is the abbreviation for parabolic trough concentrator.
Performance evaluation of flat plate collector watt. Parabolic trough solar technology is the most proven and lowest cost largescale power technology available today, primarily because of the nine large commercials solar power plants that are operating in the california mojave desert. Journal of renewable and alternative energy technologies, 1. Design and fabrication of parabolic solar concentrator with sole objective to define future projects to save natural. As such their quality and tolerance to fabrication imperfections need to be evaluated with specific tools. Experimental and theoretical study of a parabolic trough. There is a distinguish reason on the selection ofa parabolic concentrator. He has derived an integral expression to evaluate the irradiance pro. Design, construction, and test of a miniature parabolic.
A receiver tube running in the center and the length of the trough. They consist of a solar field filled with hundreds or thousands of solar collector assemblies sca. Pdf fabrication of parabolictrough concentration for. In this work thus, two technologies of solar concentration i parabolic trough cylinder ptc and ii solar tower st are initially integrated into a threepressure levels combined cycle power plant. All four parabolic troughs together are heating our water heater tank to the maxallowed 155 degrees f 68c on a typical texas day and then the. The frame for the parabola was made out of plywood. Development and testing of a prototype parabolic trough solar collector for steam generation at nsukka, south east nigeria. Gunge 2, daksh rai 3, madhuri bhalkare 4, sayali gaikwad 5 1,2,3,4,5 students of sinhgad college of engineering, pune abstract. Parabolic trough solar power technology although many solar technologies have been demonstrated, parabolic trough solar thermal electric power plant technology represents one of the major renewable energy success stories of the last two decades. The analysis ofenergy costs using the parabolic trough concentrator is developed. The parabolic curve would focus all the rays to a focal point, and a trough normally extends the shape in three dimensions to tum the focal point into a focal line. Pdf heat transfer fluids for parabolic trough solar. A parabolic trough is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror. Design of a parabolic trough solar collector using a.
Solar vacuum tube, parabolic trough solar collector, receiver tube manufacturer supplier in china, offering low cost food trailer ice cream grill food cart food truck, eec approved new electric car l7e lithium battery, eec certificated l7e 4 seaters electric new cars with speed of 60km ternary lithium battery left and right hand driving and so on. This would greatly influence the solar radiation collection and thus the efficiency of the system. Us4372027a us06277,915 us27791581a us4372027a us 4372027 a us4372027 a us 4372027a us 27791581 a us27791581 a us 27791581a us 4372027 a us4372027 a us 4372027a authority us united states prior art keywords parabolic channels interior exterior bows prior art date 19800403 legal status the legal status is an assumption and is not a legal. The ptc is made of aluminium in such a way that both the manufacturing and assembly processes do not require complicated technology or skilled labour. These systems are parabolic only in one dimension and form a long parabolic shaped trough as shown in figure 2.
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