Parabolic troughs are linear collectors with a parabolic crosssection and reflective surface which concentrate sunlight onto a receiver tube located along the troughs focal line, heating the heat transfer fluid in the tube qiblawey and banat, 2008. Figure 2 describes the working of parabolic dish collector. Luz ls1, ls2, and ls3 parabolic trough collector technology segs demonstrated commercial nature of parabolic trough technology all plants still operating, many will likely operate past 30 year lifetime demonstrated exceptional annual and on peak performance record. In this research thermodynamics performance like exergy and thermal efficiency will be considered on the first, tenth, fifteenth, twentieth, twentyfifth. The result of nanofluid based concentrated solar parabolic collector performance and efficiency of collector by 510% higher than the flat plate. Storage tank capacity 35 li tres tank material stain less steel. Usually a tube is placed along the focal line to form an external surface receiver see fig.
In a solar cooker, for example, food is placed at the focal line. Parabolic trough collector application in egypt built in 19 source. The efficiency and cost of the parabolic trough collector designs is influenced by structural stiffness, choice of materials, assembly tolerances, mirror cleanliness and wear. Ptc is oriented with its focal axis pointed either in the e w or n s direction. Smallsized parabolic trough collectors, ptcs, are the concentrating solar.
One or more of said collectors are adapted to be joined end to end and. The thermal oil is applied as the heat transfer fluid in a solar parabolic trough collector system. Advanced lowcost receiver for parabolic trough solar power. All heat transfer and thermodynamic equations, optical properties, and parameters used in the model are discussed. Concentrating solar power is expanding its deployment on the african subcontinent, highlighting the importance of efforts to indigenize manufacturing of this. Capacitive and efficient parabolic trough solar collector. It represents the optimal resolution regarding the attainable concentration ratio and the attainable energy production per aperture area in linefocusing solar collectors. Parabolic trough, simulation, solar collector, optical efficiency, thermal efficiency. Solar energy incident on the reflector is reflected on the receiver which carries a fluid used for different application. Large fields of parabolic trough collectors supply the thermal energy used to produce steam for a rankine steam turbinegenerator cycle. A parabolic trough is a one dimensional parabola that focuses solar energy onto a line. 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. Receivers for parabolic trough collectors can be classified as either evacuated or nonevacuated. Modeling and characteristic analysis of a solar parabolic.
Ls2 parabolic trough collectors, kramer junction, ca. Parabolic trough collector ptc consists of a reflecting surface made by bending highly polished stainless steel reflector and fixed on a parabolic contour. A closed parabolic trough solar collector gang xiao 30th october 2007 parabolic trough 1 is the most mature technology for large scale exploitation of solar energy. The modelling of these devices is a key aspect in the improvement of their design and performances which can represent a considerable increase of the overall ef. When this is done, the cofocal point then becomes a cofocal line. A parabolic trough collector, similar in size to smallerscale commercial modules, has been developed locally for use in an ongoing ptsc research programme. Modeling and experimental investigation of parabolic trough solar collector institution. The parabolic trough solar energy collector is selected mainly due to its ability to function at high temperatures with high efficiency. A wide variety of parabolic trough solar collector options are available to you, such as solar thermal, water heater and air conditioning system. There are 128 parabolic trough solar collector suppliers, mainly located in asia.
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 integrated tubes. Parabolic trough collector needs the parabolic reflector having two dimensional parabolic profile. Pdf basic fundamentals of parabolic trough collector. 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. Over 100 years ago, suspension bridges vastly increased the span of bridge technologies, reducing both material consumption and manufacturing costs. The receiver of a parabolic trough collector is linear.
In this paper are presented the results of designing a parabolic trough solar collector ptsc, and its application in a solar thermal system for the production of. Heat transfer analysis and modeling of a parabolic trough. Design and fabrication of parabolic trough solar water heater. Description the objective of the present work is to design, develop and investigate the performance of a ptc for hot water generation system. The parabolic trough collector ptc is the most common type of hightemperature solar thermal technology, in which the heat transfer fluid is usually synthetic oil, molten salt or watersteam. The cylindrical parabolic collector is also referred to as a parabolic trough collector or a linear parabolic collector. The assumed solar field area in both cases was about 1. Mathematical modeling of the parabolic trough collector field. 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. Parabolic solar trough collector 1 currently ptc is the most established and attractive aspect. How parabolic trough power plants work parabolic trough power plants use concentrated sunlight, in place of fossil fuels, to provide the thermal energy required to drive a conventional power plant.
Parabolic trough solar collectors and their applications. Design of a parabolic trough solar collector using a. Systems with light structures and low cost technology for process heat application up to 400 8c could be obtained with parabolic through collectors. Numerical simulation of vacuum annulus in a parabolic trough solar collector. A parabolic trough solar energy collector including an elongated support with a plurality of ribs secured thereto and extending outwardly therefrom. Parabolic trough collectors are a low cost implementation of concentrated solar power technology that focuses incident sunlight onto a tube filled with a heat transfer fluid. Then, an experimental ptc system setup is established with a concentration ratio of 9. Dickes, in organic rankine cycle orc power systems, 2017 16. This work presents a reproducible parabolic trough solar water heater as a suitable renewable technology for reducing waterheating costs and. In the e w orientation, the focal axis is horizontal, while ns situation. Design and simulation of solar parabolic trough with trnsys. Firstly, the system dynamic model was established and validated by the real operating data in typical summer and spring days in references. Parabolic trough collectors are frequently employed for solar steam generation because temperatures of about 300 can be obtained without any serious degradation in the collector s efficiency.
Design, construction and evaluation of parabolic trough collector. Modeling and experimental investigation of parabolic trough. The incident solarradiation falling on the collector is utilized for pipe heating. The current study presents a numerical and realtime performance analysis of a parabolic trough collector ptc system designed for solar airconditioning applications. Parabolic trough collector orientation and tracking modes methodology. Sunlight entering the collector aperture with a normal incidence is concentrated onto a heat receiver located at the focal point of. Performance analysis for parabolic trough collector fields. Parabolic trough collector ptc can be installed appropriately to track the suns movement. Linear focus collectors achieve medium concentration factors 50 suns and over, and point focus collectors achieve high concentration factors over 500 suns. Pdf abstract solar collector in the shape of a parabolic mirror reflects the incident solar energy on the longitudinal axis of the solar collector. Parabolic trough collector the energy of sunlight which enters the mirror parallel to its plane of symmetry is focused along the focal line, where objects are positioned that.
S n normal to tilted plane normal to horizontal plane. Apr 24, 2002 more than 2,000,000 m 2 of parabolic trough collector technology has been operating daily for up to 18 years, and as the year 2001 ended, these plants had accumulated 127 years of operational experience. The assembly at the geometrical focus of the parabolic trough consists of a metallic tube enclosed within an evacuated cylindrical glassshield. Development of a smallsized parabolictrough collector. Dni is concentrated onto the receiver tube as illustrated in fig. Evacuated receivers are commonly used for temperatures above 300 c because they have a high vacuum i. Parabolic trough collector water heating efficient. Turchi national renewable energy laboratory technical report nreltp6a2065228. The parabolic contour is supported by steel framework and mounted on a reflector support structure. Advances in parabolic trough solar power technology j. A parabolic trough collector ptc is a linear concentrating system made of long, parabolic shaped mirrors and a receiver tube placed along the focal axis of the parabola. Plant overview figure 1 shows a process flow diagram that is representative of the majority of parabolic trough solar power plants in operation today. The reflecting surface may also be made of polished mirror. The paper proposes a common methodology to assess the technical data of parabolic trough collectors, which are required by technology developers, system designers as well as financing institutions and policy makers to predict the performance of parabolic trough solar fields.
Modeling and experimental investigation of parabolic. Modelling of solar thermal power plant using parabolic trough. Parabolic trough collector ptc generally used in an industrial application for thermal and power generation application. Parabolic trough collector receiver trough stand tracking system balance of system piping instrumentation and safety mechanism storage system optional key design variants parabolic trough is currently available in five different designs, as given below in bracket. The size of the tube, and therefore the concentration ratio, is determined by the size of the reflected sun image and the manufacturing. A glass envelope is often placed around the hce to limit convection losses and further improve the collector. These plants use a large fi eld of parabolic trough collectors which track the sun during the day and concentrate the. Supporting structure for a parabolic trough of solar collectors ep2631556a1 en 20120221. Pdf modelling of solar thermal power plant using parabolic.
The metallic tube is the hce within which the thermic fluid4 therminolvp1 tm is flowing. About 6% % of these are solar collectors, 1%% are solar water heaters, and 1%% are other solar energy related products. Some simulations are shown to demonstrate the adequate behavior of the model compared to the facility design conditions. Parabolic trough power plants use parabolic trough collectors to concentrate the direct solar. Optimal model predictive rejection control for nonlinear parabolic trough collector with lumped disturbances xianhua gao, shangshang wei, and zhigang su transactions of the institute of measurement and control 0 10. Smallsized parabolic trough collector system for solar.
Solarpaces conference, mexico, oaxaca 2004 luepfert227 1 towards standard performance analysis for parabolic trough collector fields e. Parabolic trough solar collectors semantic scholar. Parabolic trough collectors ptc are frequently used for steam generation. Parabolic trough solar collectors utilize a heat transfer fluid htf that flows through the receiver collecting and transporting solar thermal energy to the power. To understand how these collectors operate, it is necessary to describe the optical properties of the concentrators and the images the distribution of solar radiation flux across the focus they produce. This theses is concerned with an experimental study of a parabolic trough collector with its sun tracking system designed and manufactured utilizing the existing gaza technologies and available local materials. Analysis of nanofluidbased parabolic trough collectors. Parabolic trough collector cost update for the system advisor. A parabolic trough solar collector uses a mirror in the shape of a parabolic cylinder to reflect and concentrate. This report updates the baseline cost for parabolic trough solar fields in the united states. Analytical expression of parabolic trough solar collector. Eurotrough parabolic trough collector developed for. One surface of said ribs is shaped to define a parabola and is adapted to receive and support a thin reflecting sheet which forms a parabolic trough reflecting surface. Parabolic trough collector overview notes on a bit of history, development after luz, and a recent surge in trough collector technology offerings dr.
A parabolic dish reflector pdr is a pointfocus system with a paraboloid geometry given by the revolution of one half of a parabola around its normal axis. Material and component specifications single axis tracked. The fundamental characteristics of the performance of a parabolic trough solar collector are its concentration ratio and its optical efficiency. Iran is one of the potential countries that use parabolic trough power plant system. The single absorber tubes are supported by absorber tube supports 14 and surrounded by a glass tube 15. Mathematical modeling of the parabolic trough collector.
A more sophisticated parabolic collector trough can be designed, that avoids the need to track the sun altogether, by combining two parabolas together, to form the compound parabolic trough solar collector. Supporting structure for a parabolic trough of a solar collector wo2084016a1 en 20111208. Parabolic trough collector cost update for the system advisor model sam parthiv kurup and craig s. C currently represents a relevant percentage of global thermal energy consumption. If a coolant filled pipe solar energy absorber pipe, or a.
Pdf an overview on parabolic trough solar collectors. However, the current technology suffers from a too high installation cost. The modelling of these devices is a key aspect in the improvement of their design and performances which can represent a considerable increase. Parabolic trough solar collector ptc is economically the most proven and advanced of the various csp technologies. The model determines the performance of a parabolic trough solar collector s linear receiver, also called a heat collector element hce. The reflectors are arranged so as to give a parabolic shape and reflect the incident solar radiation onto to a tubular receiver.
Parabolic trough collector system specifications items value collector aperture 0. Performance of a parabolic trough solar collector by michael. Challenges and prospect for the development of parabolic. The construction of a parabolic trough collector is simple. Parabolic trough collector and heat transfer system using molten salt179. They identified aluminium sheet as cost effective material to use as reflector. Harnessing solar energy has been a constant endeavor of. Parabolic trough collector an overview sciencedirect topics. Pdf on oct 23, 2019, harbhinder singh published basic fundamentals of parabolic trough collector find, read and cite all the research.
The absorber is a tube, painted with solar radiatio. Cfd analysis of a heat collector element in a solar. The parabolic trough collectors ptc consist of solar collectors mirrors, heat receivers and support structures. Collector development history luz concentrator structures. Comparison of different heat transfer models for parabolic trough solar collectors. Parabolic trough solar thermal electric power plants. 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. Parabolic trough collector is solar energy conversion technology used for heat application. Nov 25, 2010 a parabolic trough collector it is a principle of geometry that a parabolic reflector pointed at the sun will reflect parallel rays of light to the focal point of the parabola. Simplified methodology for designing parabolic trough. Solar system using parabolic trough collector for water. Parabolic trough collectors are typically used in active, indirect water heating systems. Collector the collector of a parabolic trough is an assembly of curved shaped reflectors arranged on a structural steel framework.
Numerical modelling of a parabolic trough solar collector. Parabolic trough collector an overview sciencedirect. Component authors year applicationpurpose table 1010solar parabolic trough system components thermal storage molten salt or others thermal storage hot and cold tank in recent studies. The parabolic trough collector has a receiver formed by several single absorber tubes. Optimal model predictive rejection control for nonlinear. Simplified methodology for designing parabolic trough solar. The aim of this study was to test and fully characterise the performance of the collector. However, our study is more general and broad based.
The luz collector technology has demonstrated its ability to operate in a commercial power plant environment like no other solar technology in. Cfd analysis of a heat collector element in a solar parabolic. Analysis of anual performance of a parabolic trough solar. Design and construction of a parabolic trough solar collector for. Ragheb 2011 the interest in the parabolic trough technology did not rise again until 1977, when the us department of energy as well as the german federal ministry of research and technology began to fund the. Introduction thermal energy demand at temperatures up to 250.
Heat losses from parabolic trough solar collectors mohamad 2014. Parabolic trough and concentrating linear fresnel reflectors are classified as linear focus collector types, while dish and solar tower are point focus types. Summary parabolic trough solar collector usually consists of a. Parabolic trough collector is the most proven technology to convert solar energy into electricity. Several power plants based on this technology have been operational for years, and more are being built. The collector will continuously track the sun with the help of the tracking system to ensure the maximum reflection of the solar radiation on the receiver ahmad, 2012. The parabolic shaped mirrors are constructed by forming a sheet of reflective material into a parabolic shape that concentrates incoming sunlight onto a central receiver tube at the focal line of the collector. Design and fabrication of parabolic trough solar water. Parabolic trough collector water heating efficient energy use.
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