The concentrator used was a television satellite dish of 2 m in diameter, in which the reflecting area was covered with reflective aluminium strips. A parabolic dish solar power plant is based on a single parabolic reflector, similar in shape to a satellite antenna. A parabolic or paraboloid or paraboloidal reflector or dish or mirror is a reflective surface used to collect or project energy such as light, sound, or radio waves. Design and fabrication of parabolic solar collector. The purpose of this study was to define mean and peak wind loads on parabolic dish solar collectors. Optical design of a solar parabolic concentrating collector based on trapezoidal reflective petals 715 is carried out to improve the overall performance of system. The dish concentrates radiation from the sun onto a conical cavity receiver placed at its focal point. The high temperature solar thermal systems ptc, cpc, dish, fres nel, which require sunlight concentration, have higher conversion efficiency. Even if the dish is a standard manufactured unit, they will vary from dish to dish due to tolerance. This paper presents the development of a solar parabolic dish collector prototype for rural areas with high solar resource. Parabolic dish concentrating collector for indirect solar cooking amos veremachi. The shape of a parabola means that incoming light rays which are parallel to the dish s axis will be reflected toward the focus, no matter where on the dish they arrive. Design, construction and testing of a parabolic solar steam generator joshua folaranmi 120 parabolic dish.
Suppose you wanted to design a parabolic dish with a depth, d, of 1 meter and a radius of 5 meters. The solar dish stirling technology is well beyond the research and development phase, with more than 20 years of recorded operating history. Types of concentrating solar collectors your electrical. In this study, a conventional steam power plant with two regenerative boilers is considered, and one of its boilers is replaced with parabolic solar dish collectors and storing the produced thermal energy by the phase change material pcm in a storage tank. Most solar concentrator tracking technologies use an actuator for vertical. This allows this type of collector to achieve the highest concentration ratios among all other type of solar. The equipment is well characterized with over 50,000 hours of onsun time. Design, construction and testing of a parabolic solar. A parabolic solar cooker, which uses a parabolic dish as concentrator, was designed and developed. Currently, there are two available designs of parabolic concentrator. Design and construction of a solar collector parabolic dish. Introduction thermal power technologies such as a parabolic trough systems, b solar tower systems, c solar dish systems and d linear the parabolic solar. Currently, leading contenders use a stirling cycle engine with a heat absorber surface at. The basic design of oroszs solar generator system is simple.
The average value of the overall heat loss coefficient was found to be about 356 wm2. Solar cells can provide some output even in diffused light, not so the case in solar parabolic troughs. Pdf developments in parabolic solar dish concentrator for. Solar parabolic dish stirling engine system design, simulation, and thermal analysis article pdf available in energy conversion and management 126.
Lowcost concentrating solar collector for steam generation by john dascomb a thesis submitted to the. Introduction requirement of energy rapidly go on increasing with increase in population of country. 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. Status of parabolic dish solar concentrators vanita thakkar associate professor.
Sam includes models for the following kinds of csp systems. Pdf the objective of this research was to design a low cost parabolic solar dish concentrator with smallto moderate size for direct electricity. A parabolic trough solar collector uses a mirror in the shape of a parabolic cylinder to reflect and concentrate sun radiations towards a receiver tube located at the focus line of the parabolic cylinder. An economic parabolic dish concentrating system was built at the sustainable energy science and engineering center sesec at florida state university in tallahassee, florida.
A parabola is the locus of a point that moves so that its distances from a fixed line and a fixed point are equal. In concept, the solar dish is similar to the solar tower, but on a much smaller scale. Pdf status of parabolic dish solar concentrators vanita thakkar. Parabolic dish csp technology parabolic dish geometry concentrates light in a single focal point, i. The bottom figure defines the distance, f, of the focus from the bottom of the dish, and the diameter, d, of the dish. The receiver absorbs the incoming radiations and transforms them into thermal energy. Method of a given focus and directrix was employed in the construction of the. A standalone parabolic dish solar cooker for african. Mechanical design of a low cost parabolic solar dish. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. Since 1984, the solar dish stirling equipment has held the worlds efficiency record. High concentrated sunlight is essential for good working of a parabolic trough. Parabolic dish concentrating collector for indirect solar. The cost of cheap reflectors for concentrating dish systems.
The solar option and solar collector solar energy is a very large, inexhaustible of energy, the power from the sun intercepted. Pdf solar parabolic dish stirling engine system design. Pdf modeling and simulation for different parabolic dish stirling engine designs have been carried out using matlab. The 9 meter hybrid parabolic solar concentrator solar dish continuously tracks the sun throughout the day using a dual axis tracker enabling the system to harvest maximum solar energy from early sunrise to late sunset. A typical parabolic dish collector has a dish of 6 m diameter. The trouble with dish stirling csp new energy update. Parabolic trough, molten salt and direct steam power towers, molten salt and direct steam linear fresnel, dish stirling, a generic csp model, integrated solar combined cycle. Practical field alignment of parabolic trough solar. Solar concentrators rensselaer polytechnic institute. The main components of a solar dishengine system are a parabolic collector, a receiver. Automatic dualaxis solar tracking system for parabolic dish. How do solar parabolic dishes work solar power world.
To calculate the focal point f of your dish, you need to measure the diameter d and depth d of the dish. Through a polished stainless steel parabolic dish, solar radiation is concentrated into. These concentrators are mounted on a structure with a twoaxis tracking system to follow the sun. Design and fabrication of parabolic solar collector mechanical and automobile ieee project topics, thermal engineering base paper ideas, synopsis, abstract, report, figures, full pdf, working details for mechanical engineering me, diploma, btech, be, mtech and msc college students. Solar cookers how to make, use and enjoy 10th edition, 2004 this guidebook is a sum of contributions from educators, engineers, longtime solar cooks and promoters, most of who served as volunteers with solar cookers international sci.
One is by rotating the two dimensional design along the xaxis to produce a parabolic dish, and the other way is by having a parabolic trough. Steven dubowsky professor department of mechanical engineering massachusetts institute of technology cambridge, 029 ma. This vessel is mounted at the focal point of the parabolic dish. Best for fast parabolic dish collector, one or more parabolic dishes concentrate solar energy at a single focal point. Parabolic dish solar concentrators have shown high conversion efficiencies and high operating temperatures, of the order of 750 o c, at annual efficiency of 23% and 29% peak 30, 31. The parabolic trough reflector is a solar energy collector designed to capture the suns direct solar radiation over a large surface area and focus or concentrate it onto a small focal point area, increasing the solar energy received by more than a factor of two.
Building a diy parabolic solar cooker recoil offgrid. The cooker was designed to cook food equivalent of 12 kg of dry rice per day, for a relatively medium size. Water distillation system using parabolic dish solar. They so far have the highest heatelectricity conversion efficiencies among all csp designs up to 30 %. A single solar dish stirling engine installed at sandia national laboratories national solar thermal test facility nsttf produces as much as 25 kw of electricity, with a conversion efficiency of 31. A parabolic dish system consists of a parabolic shaped point focus concentrator in the form of a dish that reflects solar radiation onto a receiver mounted at the focal point. Manual making of a parabolic solar collector gang xiao.
Pdf in this paper, design and fabrication of the parabolic solar dish concentrator for the steam generation have been carried out. Loads on isolated collectors and on collectors within. A parabolic dish solar thermal cooker having aperture diameter 1. Pdf design and development of a parabolic dish solar. Development of a solar concentrator with tracking system. The size of the concentrator is determined by its engine. Learn how to build a diy parabolic solar cooker, a shiny satellite dish that focuses sunlight, cooking food without need for the grid. A parabolic dish reflector pdr, shown schematically in figure 3. The system consists of a dual axis tracking parabolic solar dish and bespoke cavity type receiver, which works as a once through solar steam. Calculating a parabolic dish s focal point calculating the correct focal point of you dish is important when installing a feed. Special thanks to mark aalfs, paul barth, elinor benes. By jason deign it is probably fair to say solar thermal dish stirling technology had its finest moment around october 2010. A parabolic dish system uses a computer to track the sun and concentrate the suns rays onto a receiver located at the focal point in front of the dish. In addition, the fact that the facet normals of parabolic dishes conveniently point to the same general location approxi mately one focal length behind the dish.
Most of the parabolic concentrator employs only a truncated portion of the parabola. Noting that little work has been done in the area of lowering the cost of solar dish, this paper demonstrates the mechanical design of low cost parabolic solar dish concentrator with smalltomoderate size for direct electricity generation. Lowcost concentrating solar collector for steam generation. Due to the limitations of size and the small quantity of fluid, dish type solar collectors are suitable for only small power generation up to few kw. Concentrating collectors seminar report, ppt, pdf for. Distinguishing between parabolic trough power plants, fresnel power plants, solar tower power plants and dish stirling systems, the parabolic trough power plants provide over 90% of the capacity of concentrating solar power plant technology that is in operation or in construction in september 2010. Solar dish collectors are generally collectors that concentrate solar energy in a small area known as focal point. Design specifications of parabolic dish solar concentrator concentration of the sun rays in parabolic dish type solar concentrator, is done, as the name suggests, according to the geometry of the concentrator i. In diffused light, there is an inability to focus sunlight efficiently and the output decreases dramatically. Parabolic dish systems use satellitelike mirror dish es to focus the light onto a singlecentral receiver in front of the mirror. Index termsarduino uno, atmega328 microcontroller, dualaxis solar tracker, hercules lite motor driver, pmdc geared motor.
The design and development of a parabolic dish solar water heater for domestic hot water application is presented in this paper together with the predicted and actual thermal performance of the system. Performance analysis methodology for parabolic dish solar. Solar parabolic trough plants have been built with efficiencies of about 20%. Pdf mechanical design of a low cost parabolic solar dish. Jones and wang 10 computed the flux distribution on a cylindrical receiver of parabolic dish concentrator using geometric optics. The heat engine uses the concentrated solar heat to produce electricity. They need to be relatively precise and are expensive to fabricate and to transport. Wind loads on heliostats and parabolic dish collectors. That was when the us department of the interior cleared stirling energy systems ses and its development partner tessera solar to build two major plants using the technology. References for the solar process heat models are listed separately below.
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