How do solar parabolic dishes work solar power world. Using the sun energy to heat water is not a new idea. Dishengine system concentrating solar power basics. 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. Troughs and bowls are linefocus tracking reflectors that concentrate sunlight onto receiver tubes along their focal lines. Solar dishengine systems are small energy conversion units compared to other csp. The present study has been conducted using nanofluids and molten salts for energy and exergy analyses of two types of solar collectors incorporated with the steam power plant. Solar collector the energy of the solar radiation is in this case converted to heat with the use of solar panel. Introduction about 70% of the planet is covered in water, yet of all of that, only around 2% is fresh water, and of that 2%, about 1. Parabolic dish concentrating collector for indirect solar cooking amos veremachi. Design, construction and testing of a parabolic solar steam generator joshua folaranmi 120 parabolic dish. Concentrating collectors seminar report, ppt, pdf for.
Parabolic technology industries, llc pti is a newly formed texas corporation that was formed to be a special purpose vehicle for the purpose of conducting parabolic mirror turbine projects in nations with a high index of sunlight and a low index for cloudiness. A major intent of the study was to define wind load reduction factors for collectors within a field resulting. Dish engine systems use a parabolic dish of mirrors to direct and concentrate sunlight onto a central engine that produces electricity. Pdf estimating intercept factor of a parabolic solar. Method of a given focus and directrix was employed in the construction of the parabolic dish. In this case, a parabolic mirror concentrates incident solar irradiation onto a much smaller receiver area, greatly decreasing heat loss and maximizing the available energy from the sun. The sun is one of the richest energy sources in this context and is almost inexhaustible. Parabolic trough collector technology abengoa solar. The difference here being that it is a 12foot wide dish consisting of an aluminium. Lowcost concentrating solar collector for steam generation by john dascomb a thesis submitted to the. A parabolic dish reflector pdr, shown schematically in figure 3. Lowcost concentrating solar collector for steam generation by john dascomb a thesis submitted to the department of mechanical engineering in partial ful llment of the requirements for the degree of master of science degree awarded. A typical array of solar collectors is seen opposite. The concentration index is defined as the ratio between the aperture area aa and the area of the receiver ar, as shown in equation 3.
It absorbs the solar radiation as heat and transfers it to the heat transport fluid. This paper presents the development of a solar parabolic dish collector prototype for rural areas with high solar resource. Table 1 cost of subsidiary requirements requirement cost incurred safe. Wind loads on heliostats and parabolic dish collectors. Design and construction of a solar collector parabolic. Water distillation system using parabolic dish solar collector. The dish structure must fully track the sun to reflect the beam into the thermal receiver. Later in 1878 a parabolic collector was showcased and reected. The solar dish stirling technology is well beyond the research and development phase, with more than 20 years of recorded operating history. Parabolic trough collectors are frequently employed for solar steamgeneration because temperatures of about 300 can be obtained without any serious degradation in the collector s efficiency. Solar thermal collectors and applications soteris a. These are relatives of his concentrators, and usually this solar technology is called the term parabolic dish, but we must make the mental effort to see the relationship.
The parabolic dish reflector consists of even curvilinear trapezoel idal reflective petals constructed by poly methyl methacrylate with silvered mirror. This factor is directly related with the fidelity of the trough geometry with respect to. Solar collectors, parabolic mirrors, low cost fabrication. Parabolic dish concentrating collector for indirect solar cooking. They so far have the highest heatelectricity conversion efficiencies among all csp designs up to 30 %. There are good designs here that can be built on a budget and without exceptional mechanical skills.
Approximately a 700 watt solar heat input is required to operate the engine which rated power output is 2 watt 1. In this paper work the performance analysis of parabolic solar dish collector is done with the use of different reflecting materials. A wide variety of parabolic solar collector options are available to you, such as pressurized, evacuated tube, and nonpressure. Parabolic dish reflector pdr point 100 100500 heliostat field collector hfc point 1001500 1502000 note. Solar collectors are one way of focussing the suns rays to heat up fluids. A parabolic trough employs parabolic mirrors that act as collectors can be coated silver or polished for more efficiency. Parabolic dish collectors require dualaxis solar tracking. Through a polished stainless steel parabolic dish, solar radiation is concentrated into. There are many different types of concentrating solar collectors. Box 20423, nicosia 2152, cyprus received 18 june 2003. The incident solar radiation falling on the collector is utilized for pipe heating. Solar energy received by earth through radiation can be. The megawatt system mws solar dish concentrator a high efficiency 2axis tracking concentrator.
Through a polished stainless steel parabolic dish, solar radiation is. Parabolic dish csp technology parabolic dish geometry concentrates light in a single focal point, i. Solar cells can provide some output even in diffused light, not so the case in solar parabolic troughs. The site can be a bit of a challenge to find stuff on, but its worth the effort. Design, construction and testing of a parabolic solar. The dishengine system is a concentrating solar power csp technology that produces smaller amounts of electricity than other csp technologiestypically in the range of 3 to 25 kilowattsbut is beneficial for modular use.
The main components of a solar dishengine system are a parabolic collector, a. Parabolic trough collector it is a line focusing type collector. Most solar concentrator tracking technologies use an actuator for vertical tracking. Solar collector is one of the main components in a solar thermal system.
Pdf solar power is a largest potential energy sources that ever receives by the earth. Pdf the efficient conversion of the direct solar radiation into heat by using concentrating solar collectors involves a biaxial tracking system. Schematic of a parabolicdish solar concentrator 57. The parabolic dish was selected as the collector most likely to maximize energy collection as required by this specific site. I was inspired by the functionality of a new software called 123dmake that makes it easy to build large, geom. The shenandoah parabolic dish solar collector sandia national. The equipment is well characterized with over 50,000 hours of onsun time. Dish systems dish systems use dishshaped parabolic mirrors as reflectors to concentrate and focus the suns rays onto a receiver, which is mounted above the dish at the dish center. The 9 meter solar concentrator uses a slew drive instead of an actuator for rocksolid.
Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. Performance analysis methodology for parabolic dish solar. The outlet temperature of the fluid from the collector 20. Pdf performance evaluation of parabolic dish type solar collector. The global need for energy is constantly increasing and makes it inevitable to reinforce the use of alternative resources.
The 2 by 4 was attached to the rectangular base of the parabolic frames with three 2 inch screws on each side. An economic parabolic dish concentrating system was built at the sustainable energy science and engineering center sesec at florida state university in tallahassee, florida. Jones and wang 10 computed the flux distribution on a cylindrical receiver of parabolic dish concentrator using geometric optics. Sep 02, 2012 in diffused light, there is an inability to focus sunlight efficiently and the output decreases dramatically. In case of a parabola, incoming rays which are parallel suns rays arriving are nearly parallel will be reflected always to the focus regardless of where they arrive on the dish. Optical design of a solar parabolic concentrating collector. Loads on isolated collectors and on collectors within a fi e 1 d of collectors were obtained.
Pdf innovative tracking system for parabolic dish solar collector. 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. Performance analysis of parabolic solar dish collector for. Parabolic trough plants require large amount of land while solar pvs can be conveniently places on rooftops.
Concentrating collector modules can be used alone or in a multimodule system. Dishengine systems use a parabolic dish of mirrors to direct and concentrate sunlight onto a central engine that produces electricity. Ukrainian solar concentrator unusual parabolic dish youtube. Nuzamas parabolic dish directional microphone, monocular x8 times long distance hearing, birds listening telescope, bush walking, hunting, fishing, camping tools. With a parabolic dish collector, one or more parabolic dishes concentrate solar energy at a.
Flat plate versus evacuated tube solar collectors pdf. 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, construction and testing of a parabolic solar steam. They are basically unusually shaped mirrors parabolic in shape that focus the heat of the sun on a pipe carrying a special fluid. The purpose of this study was to define mean and peak wind loads on parabolic dish solar collectors. 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. Since 1984, the solar dish stirling equipment has held the worlds efficiency record. The size of the concentrator is determined by its engine.
More than one hundred years ago black painted water tanks were used as simple solar water heaters in a number of countries. Building a parabolic solar hotwater heater using 123d. In order to boil water with solar energy, we propose to design and conceive a parabolic solar collector. 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. Large thermal systems may use many collectors covering large sites 2. Parabolic dish concentrating collector for indirect solar. Experimental investigation of modified solar still. Parabolic solar collector ayush khare 1, sachin saxena, c h tyagi1 and sanjeev kumar1 corresponding author. Design, construction, and test of a miniature parabolic. Concentration ratio is defined as the aperture area divided by the receiverabsorber area of the collector. This reduces efficiency, but makes it cheaper to build and operate. Pdf solar collector in the shape of a parabolic mirror reflects the incident solar energy on the longitudinal axis of the solar collector.
This paper reveals prototype design of solar parabolic dish collector with truncated cone shaped helical coiled receiver made up of copper and coated with nickel. Lowcost concentrating solar collector for steam generation. If the design is successful, the parabolic solar collector device can be marketed to the millions of household owners. To build the base of the solar collector two partial triangles were cut from the remaining plywood. Parabolic dish collectors are characterized for having a higher concentration ratio than the rest of the solar collector systems. Types of concentrating solar collectors your electrical guide. Parabolic dish systems use satellitelike mirror dish es to focus the light onto a singlecentral receiver in front of the mirror. Prototype has been built and is being tested at solar energy center of ministry of new and renewable energy mnre. When a new design for a solar collector is developed it is necessary to guarantee that its intercept factor is good enough to produce the expected thermal jump. Water distillation system using parabolic dish solar. Prototype has been built and is being tested at solar energy center of. 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.
Types of concentrating solar collectors your electrical. Abst concentrating collector comprising a 2000 mm diameter, and. Design and construction of a solar collector parabolic dish. Its uses do not contribute to emission of greenhouse gases and other pollutants to the environment. Triple basin solar alone, triple basin solar with cooling cover, triple basin solar integrated with a parabolic dish collector, and triple basin solar integrated with a parabolic dish collector with cooling cover. A dishengine system is a standalone unit composed primarily of a collector, a receiver, and an engine see fig. Design and development of compound parabolic to design and fabricate a parabolic dish solar steam generating machine which uses solar energy as its fuel. How they work by solar power engineering january 23, 2010 the solar dish stirling technology is well beyond the research and development phase, with more than 20 years of recorded operating history. Abstractthe parabolic dish solar collector technology is very useful as it is used for approximately all solar energy applications such as steam and power generation, water heating, air heating etc.
Parabolic dish type solar collector 1 the receiver shown in fig 1 is usually made of a sheet of high thermal conductivity metal,copper or aluminum with. This is the concave dish made of wood and lined with an aluminium sheet. The researchers found that case number four was the highest yield around 16. It is the most powerful type of collector which concentrates sunlight at a single, focal point, via one or more parabolic dishesarranged in a similar fashion to a. A solar thermal collector collects heat by absorbing sunlight. The receiver absorbs the incoming radiations and transforms them into thermal energy. The solar collector prototype proposes a solution to solve these kinds of issues and use sunlight to work it. The average value of the overall heat loss coefficient was found to be about 356 wm2. Design and fabrication of parabolic solar collector. The goal of this paper is to present the optical and the thermal analysis of a parabolic dish concentrator with a spiral coil receiver. In this type of collector, the solar radiations falling on the area of the parabolic reflector are concentrated at the focus of the parabola.
A typical parabolic dish collector has a dish of 6 m diameter. Manual making of a parabolic solar collector gang xiao laboratoire j. Optical design of a solar parabolic concentrating collector based on trapezoidal reflective petals 715 is carried out to improve the overall performance of system. 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. The outlet temperature of the fluid from the collector. Bringing you a prosperous future where energy is clean, abundant, reliable, and. Duanes redrok site is information central for diy heliostats and concentrating solar collectors.
Pdf estimating intercept factor of a parabolic solar trough. Mechanical design of a low cost parabolic solar dish concentrator. Performance assessment of parabolic dish and parabolic. A solar bowl is a type of solar thermal collector that operates similarly to a parabolic dish, but instead of using a tracking parabolic mirror with a fixed receiver, it has a fixed spherical mirror with a tracking receiver. 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. For this project i set out to create the solar equivalent of the hotwater tap on a coffee machine. Manual making of a parabolic solar collector gang xiao. Kalogirou department of mechanical engineering, higher technical institute, p. To demonstrate such problem a parabolic dish solar collector is designed to provide energy to the ltd stirling engine for small scale power generation. Water distillation, saline water, solar dish collector, parabolic dish collector, coastal area.
Parabolic dish pd and parabolic trough pt solar collectors are used to harness solar energy using four different solar absorption fluids. The collector element is a coil of 14copper tube painted with high temperature black paint. This allows this type of collector to achieve the highest concentration ratios among all other type of solar collectors. Performance evaluation of flat plate collector watt the useful heat output of a flatplate solar collector is given by 18.
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