The projection on the aperture plane of the active mirror collecting area of a parabolic trough, i. Patented parabolic trough reflectors, uses the latest technology. The improved convex surface is a film of plastic coated with chromium metal on its exterior surface. This report updates the baseline cost for parabolic trough solar fields in the united states. Design and fabrication of parabolic trough solar water. Diy parabolic mirror solar reflector project youtube. In order to eliminate these problems, an evacuated concentrator, which consists of involute and compound parabolic reflector, was proposed to obtain higher performance and low material cost 8. Parabolic trough collector cost update for the system. Manual making of a parabolic solar collector gang xiao. Design, construction and testing of a parabolic solar. What we really want is a feed antenna that only radiates toward the reflector, and. 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. A parabolic solar cooker might be used like a stovetop by heating a pan or pot to a high temperature. Collimates a light source or focuses a collimated beam parabolic profile eliminates spherical aberration surface enhancements.
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. A parabolic trough solar collector uses a mirror in the shape of a parabolic cylinder to reflect and concentrate. In addition, sidebars provide indicators that a system. Performance analysis of parabolic solar dish collector for. A parabolic trough concentrator is made of an aluminum sheet which is covered by a cloth on which rectangular mirror strips 1.
Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. It is a solar cooker with a parabolic reflector of just over 1 m2 of. Solar collector concentrated solar power plant industrial process heat heat water production solar cooling. The dish structure must fully track the sun to reflect the beam into the thermal receiver. Parabolic solar trough concentrators and a linear fresnel concentrators are similar. This is the concave dish made of wood and lined with an aluminium sheet. I show you how to build a solar cooker with a parabolic reflector. Design of concentrating parabolic reflector system to. Pdf an overview on parabolic trough solar collectors. Parabolic trough collector overview notes on a bit of history, development after luz, and a recent surge in trough collector technology offerings dr. Investigating parabolic solar cookers geometry expressions. Design of a parabolic trough solar collector using a. Design and analysis of a highefficiency, costeffective. There are good designs here that can be built on a budget and without exceptional mechanical skills.
A parabolic dish reflector pdr, shown schematically in figure 3. Solar millenium parabolic trough power plants constitute the biggest share of the installed concentrating solar power technology. They consist of a solar field filled with hundreds or thousands of solar collector assemblies sca. A solar trough reflector structure using a single stressed reflector skin, parabolic shaped ribs, and members to structurally close the aperture develops high strength and stiffness from a. Xk6060341 solar energy research institute a division of. The focal length is the distance from the center of the parabolic surface to the focus. The solar thermal element can be a parabolic trough field, a linear fresnel reflector field, a central receiver system or a field of parabolic dishes, commonly designed for a normal incident radiation of 800900 wm2 1. The shapes of the mirrors and collectors are key to the e. Another issue is high production cost for sun tracking systems 7. Do you want to make a working model of parabolic solar collectors or parabolic solar concentrator or parabolic solar reflector with a d2h parabolic dish and solar reflective film. Erin energy currently investigates a cylindrical collector coupled with parabolic or involute shaped mirrors.
Federal technology parabolictrough solar alert water heating. A comparative study between parabolic trough collector and linear. Maintenance of many solar systems can be difficult because of their geometry. Trough systems these solar collectors use mirrored parabolic troughs to focus the suns energy to a fluidcarrying receiver tube located at the focal point of a parabolically curved trough reflector see fig. A tool is provided for manufacturing parabolic solar reflectors. 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. Parabolic trough power plants ptpp are thus far mostly developed csp thermal plants that are operating commercially. The site can be a bit of a challenge to find stuff on, but its worth the effort. Design and construction of a solar collector parabolic dish. Design and development of compound parabolic to design and fabricate a parabolic dish solar steam generating machine which uses solar energy as its fuel. The solar collector prototype proposes a solution to solve these kinds of issues and.
Solar cooking with the sun 3 solar cookers are used differently. The parabolic trough collectors ptc consist of solar collectors mirrors, heat receivers and support structures. How to build a solar cooker with parabolic reflector part. Parabolas with focal lengths of 1 to 3 meters 3 to 10 feet are most useful for solar cooking. In diffused light, there is an inability to focus sunlight efficiently and the output decreases dramatically.
The following researches will show the summary for previous theoretical and practical work regarding parabolic trough system. To enhance the heat transfer in a parabolic trough solar collector by using zno water as nanofluid with different volumetric concentrations and. It points out the types of situations where parabolic trough solar water heating is most likely to be cost effective and describes the espc process available to federal facilities for parabolic trough projects. Cermak fluid mechanics and wind engineering program colorado state university fort collins, colorado november 1988 seri technical monitor. Parabolic trough is also considered one of the most mature and most commercially proven technologies in the utility scale csp facilities mendelsohn et al. Mechanical design of a low cost parabolic solar dish.
A parabolic mirror reflects solar radiation which is parallel to its axis, to its focus. In this site, a project of hybrid natural gassolar power plant with parabolic trough technology will be. Each sca is an independently tracking parabolic trough solar collector consisting of four major subsystems. There are also versions of this document in other languages. John ericsson constructed in 1880 the first known parabolic trough collector. The bilinear model we consider a parabolic solar collector, as depicted in fig. This pdf document contains in blue letters all necessary details including a material list, which makes the. For this purpose, tracking mechanisms similar to the ones described in the previous. Parabolic solar trough creates solar energy solar hot water steam cooker pressure a steam engine. Solar radiation, dual parabolic trough, ironaluminum sheet introduction the sun is an object that is vital to human life. Solar death ray water aqua lens with kilowatt heat energy grid free energy duration. A parabolic dish solar concentrating collector is used to heat the fluid in the receiver. Method of a given focus and directrix was employed in the construction of the. Parabolic reflector system among the different types of collectors, the parabolic collector is taken into consideration as the image is formed on the focal axes of the parabola and so it is an imaging type.
Automatic positioner and control system for a motorized parabolic solar reflector. This paper presents the development of a solar parabolic dish collector prototype for rural areas with high solar resource. A study of solar reflector efficiency of parabolic dual trough. Parabolic power plants in southern spain andasol 1 and 2, in the back ground on the right side the prepared construction ground for andasol 3, source. The first practical experience with parabolic trough solar collectors ptsc goes back to 1870, when a. This solar trough tracks the sun using a mathematical algorithm and will not chase shadows from clouds. The receiver absorbs the incoming radiations and transforms them into thermal energy. Optical design of a solar parabolic concentrating collector based on trapezoidal reflective petals 715 is carried out to improve the overall performance of system. Duanes redrok site is information central for diy heliostats and concentrating solar collectors. Optical coatings optiforms offtheshelf parabolic reflectors need a custom parabolic. Parabolic trough plants require large amount of land while solar.
Fresnel reflector an overview sciencedirect topics. Fresnel reflectors are long and narrow and have little to no curvature, and several receivers are connected to form a module. If you hold a newspaper in the focal point of the reflector, it will catch fire. For this reason, some safety guidelines are to be observed. A flat reflector will have a minimal economic impact in the cost of a parabolic trough and it allows larger concentration ratios for identical primary mirror areas compared to a standard parabolic. Pdf parabolictrough solar collectors and their applications. In this paper, two different reflective surfaces are used to increase the optical efficiency of a parabolic trough solar collector. Experimental and theoretical investigation to generate. The problem is that the energy that is not radiated toward the reflector will be wasted. These reflectors will focus light onto one point and are typically used to provide the energy for stirling engines running generators. Fresnel reflectors are similar to parabolic troughs in that solar radiation heats a receiver pipe, which contains the heat transfer fluid ugolini et al. A box cooker is most effective when it is used like a crockpot slow cooking or low heat over a long time. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave.
Solar cells can provide some output even in diffused light, not so the case in solar parabolic troughs. Wind loads on heliostats and parabolic dish collectors. In section 4, we provide simulations of the solar collector model, using data of ain beni mathar solar plant in morocco. Pdf solar collector in the shape of a parabolic mirror reflects the incident solar energy on the longitudinal axis of the solar collector. The design and fabrication of parabolic trough solar water heater for water heating was executed. The solar energy may then be collected either directly or after one or more re. Safety rules in handling the solar cooker the parabolic reflector solar cooker has considerable energy and generates temperatures high enough for baking and frying. Parabolic reflectors parabolic reflector diagram an electroformed parabolic reflector is a parabolashaped reflective surface used to collect and direct wave energy such as light. The solar image diameter is about 1120 the focal length. The procedure employed includes the design, construction and testing stages. The equipment which is made up of the reflector surface curved mirror, reflector support, absorber pipe and a stand.
The reflector is rotated to track the suns movement, and its. In this work, the effect of various parameters on the thermal performance and heat losses from the concentrated solar receiver is studied parametrically. This is in effect a 3 dimensional parabola, you will be able to see the parabolic shape looking from any side. Table 2 shows the design characteristics of the acurex, single axis tracking m. How to build a solar cooker with parabolic reflector in 3. This work presents a reproducible parabolic trough solar water heater as a suitable renewable technology for reducing waterheating costs and solar water heating systems with optical concentrating technologies as important. When we first described a parabolic dish antenna, we put a point source at the focus, so that energy would radiate uniformly in all directions both in magnitude and phase. And a solar concentrator oven can be used like a conventional oven.
Design, construction and testing of a parabolic solar steam generator joshua folaranmi 120 parabolic dish. The tool employs an improved smooth convex parabolic surface terminating in edges remote from the parabolic vertex which are preferably placed under elastic tension tending to draw the edges toward each other. Innovative technology solutions for sustainability. Pdf abstractsolar collector in the shape of a parabolic mirror reflects the incident solar energy on the longitudinal axis of the solar collector.