Heat transfer analysis of parabolic trough solar receiver. This necessitates the need to develop energy equations for computation of. Mechanical design of a low cost parabolic solar dish. These concentrators do not have such strict requirements for the incidence angle as the parabolic.
On the other hand, the concentrator must have a high reflectivity and a high surface accuracy to obtain an efficient solar collector optically. Research team rizwan masood, student of chemical engineering department, uet lahore. Engineering and manufacturing solar collectors design and construction models properties solar power plants. A parabolic trough solar collector ptc takes the radiant energy from the sun and converts it to useful thermal energy in the heat transfer fluid htf that circulates through the solar field. Parabolic trough is also considered one of the most mature and most commercially proven technologies in the utility scale csp facilities mendelsohn et al. Csp, concentrated solar power, solar thermal, power plants. The performance of a parabolic trough concentrator for solar industrial.
Material and component specifications single axis tracked. Analysis and design consideration of solar steam generation plant using parabolic trough collector. Miniature parabolic trough solar concentrator donald jeremy gaitan cal poly, san luis obispo, ca. A parabolic trough solar collector uses stainless steel sheet in the shape of parabolic cylinder to reflect and concentrate sun radiations towards an absorber tube made of g. The parabolic trough collector is one of the most developed solar concentrating technologies for medium and high temperatures up to 800 k. 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 solar thermal element can be a parabolic trough field, a linear fresnel reflector field, a central receiver system. The concentration ratio up to 10 can be achieved in the nontracking mode easily. Parabolic trough power plants constitute the biggest share of the installed concentrating solar power technology. Media in category parabolic troughs the following 21 files are in this category, out of 21 total. The absorber pipe contains the heat transfer fluid or htf which is heated and pumped to the steam generator.
Lowcost concentrating solar collector for steam generation john dascomb. 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. Over the past four years, i have improved the design. Medium temperature solar concentrators parabolictroughs. Lowcost concentrating solar collector for steam generation. 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. In spain, there are three power plants namely andasol 1, andasol 2 and andasol 3 that are being operated using parabolic trough collector technology with a capacity of 50 mw each. I medium temperature solar concentrators parabolic troughs collectors e.
Parabolic trough solar thermal electric power plants parabolic trough solar collector technology offers an environmentally sound and increasingly costeffective energy source for the future. It is sized so that the length of the parabolic curve is the same as the width of the available. Parabolictrough 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. These arms are used simultaneously to form an axis of rotation, which helps the parabolic solar concentrator follow the sun and thereby. Since the sun is very far away, the radiation rays that reach a concentrator is parallel to its axis. Bringing you a prosperous future where energy is clean, abundant, reliable and affordable u. Lowcost concentrating solar collector for steam generation by john dascomb. I pipe located at the focus line of the parabolic trough collector. This page describes the design, construction, and operation of a troughtype parabolic solar concentrator. A distinct property that it has is that it can focus all the parallel rays from the sun to a single focus point, f as shown in figure 2. Manual making of a parabolic solar collector gang xiao laboratoire j. 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. A parabolic solar concentrator is a device that focuses light on a point to heat an object. The collector concept was originated by winston in 1978.
The skytrough is a high performance parabolic trough concentrating solar collector for use in. Abstracteven though most variations of solar concentrators have palmistry guide in urdu pdf been studied or. They identified aluminium sheet as cost effective material to use as reflector. Study of organic trust pdf a simple parabolic trough solar collector tested under the local. Parabolic trough solar thermal electric power plants. Design and experimental investigation of parabolic trough solar collector is. This improved design is described in detail my new book solar parabolic trough concentrator. Parabolic trough power plants are currently one of the most mature and prominent applications of solar energy for production of electricity. Design, construction, and test of a miniature parabolic.
Analytical expression of parabolic trough solar collector. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Solar concentrators rensselaer polytechnic institute. The sunlight which enters the mirror parallel to its plane of symmetry is focused along the focal line, where objects are positioned that are intended to be heated. The objective of this study is to develop analytical expressions for the determination of the thermal performance of parabolic trough. Solar trough systems these systems provide largescale power generation from the sun and, because of their proven performance, are gaining acceptance in the energy marketplace. A 14 m2 berglass parabolic concentrator was made at sesec to ensure simplicity of production and operation. Collector is designed with simple parabolic equations. The support structure of the parabolic solar concentrator has two arms at the ends to keep the metal and glass tubes on the focus of the parabola as shown in figure 4. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray.
Designing a parabolic trough solar concentrator requires specifying. If the said parabola is extended along an axis becoming a trough the solar rays are concentrated along a line through the focal point of the trough. The objective of this research was to design a low cost parabolic solar dish concentrator with smallto moderate size for direct electricity generation. This solar technology is applied in many applications and so its investigation is common. A parabolic trough collector, similar in size to smallerscale commercial. The performance of a south african parabolic trough solar collector ptsc module has been characterised using the ashrae 931986 standard. Zarza encyclopedia of life support systems eolss the concentration ratio of a ptc is the ratio between the collector aperture area and the total area of the absorber tube. Performance evaluation of solar parabolic trough collector.
This parabolic trough 73% efficient solar power world. Such model can be installed in rural areas which are not connected to governmental grid. Design and fabrication of parabolic solar concentrator with sole objective to define future projects to save natural gas 29jul08 2rizwan masood. This would greatly influence the solar radiation collection and thus the efficiency of the system. There is a distinguish reason on the selection ofa parabolic concentrator. Parabolic trough systems use a linear parabolic concentrator with a mirrored surface to focus solar radiation on an absorber pipe running along the focal line of the parabola. Rated power capacity of the single unit is about 4.
The heliostat mirror system of the central tower receiver is, in principle, a special form of. Energy equations for computation of parabolictrough. Nine trough power plants in californias mojave desert provide the worlds largest generating capacity of solar electricity, with a combined output of 354 megawatts. Unesco eolss sample chapters solar energy conversion and photoenergy systems vol. The initial installation cost of these parabolic trough solar collectors consti tutes the. Modelling of solar thermal power plant using parabolic. A photovoltaic unit utilizing parabolic trough concentrator has been realized and tested by ansaldo. It is widely used as a reflecting solar concentrator. Distinguishing between parabolic trough power plants, fresnel power plants, solar tower. Design of a parabolic trough solar collector using a. Parabolic trough solar collectors ptscs constitute a proven source of thermal energy.
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