Schematic which shows the operation of a heatpipe solar receiver. Dishstirling system with dislocated engine the schematic representation of the proposed system is shown in fig. Pdf modeling and simulation for different parabolic dish stirling engine designs have been carried out using matlab. Performance of dishstirling csp system with dislocated engine.
Solar stirling system components the main components of a solar stirling engine systems are the solar collector dish satellite with the suntracking system, the solar receiver and the stirling motor with the electric generator. Typically the dish is coupled with a stirling engine in a dishstirling system, but also sometimes a steam engine is used. Stirling engine technology for parabolic dishstirling. This paper is aiming to find out the impact of the variability of solar radiation in the systems power flow. Figure 1 is a representation of a dish stirling system with the major system components, the dish, the power conversion unit pcu. Dishengine system concentrating solar power basics.
Front and side view of the eurodish system figure 9. Considerations regarding the use of dishstirling systems in. The objective of this work is to evaluate the potential of dish stirling systems if they are used in the fourth worldwide largest island of. A summary of the dynamic model of a dishstirling system and its control unit for power grid integration studies is provided. The dishstirling system dishstirling systems transfer concentrated solar radiation with high efficiencies into electrical energy.
A background of modeling of dishstirling solar thermal power generation dustin howard, student member, ieee and ronald g. Stirling dish system is a small power generation power plant which is scalable, modular and flexible. In this paper, a dish stirling concentrating solar power csp system was examined in which the engine works no longer as a receiver but is displaced away from it. Solarelectric dish stirling system development unt. A dishstirling systems concentrator with a nominal maximum direct normal solar insolation of wm2 and a 25kw capacity has a diameter of approximately 10 meters. Preliminary designs for 25 kwe advanced stirling conversion systems for dish electric applications richard k. Performance prediction and technoeconomic analysis of solar. Typically the dish is coupled with a stirling engine in a dish stirling system, but also sometimes a steam engine is used. Performance prediction and technoeconomic analysis of.
Jan 23, 2010 the suncatcher is a 25kilowattelectrical kwe solar dish stirling system which consists of a unique radial solar concentrator dish structure that supports an array of curved glass mirror facets, designed to automatically track the sun, collect and focus, that is, concentrate, its solar energy onto a patented power conversion unit pcu. A special case of the third type of system, a dish stirling system, is the subject of this paper. Dishstirling systems track the sun and focus solar energy into a cavity receiver where it is absorbed and transferred to a heat enginegenerator. Abstractdishstirling solar power generation has emerged as an efficient and reliable. The optimised microturbine solar power system omsop project full video duration. Ftts has been applied to determine the output power and the corresponding thermal efficiency, exergetic efficiency, and the rate of entropy generation of a solar stirling system with a finite rate of heat transfer, regenerative heat loss, conductive thermal bridging loss. Csp dish stirling unique energetic and ecological device. Status of the advanced stirling conversion system project for. Solar dishstirling system has proved to be the most efficient way to generate electricity using solar energy. The suncatcher is a 25kilowattelectrical kwe solar dish stirling system which consists of a unique radial solar concentrator dish structure that supports an array of curved glass mirror facets, designed to automatically track the sun. How do solar parabolic dishes work solar power world. Dishstirling systems have demonstrated the highest efficiency of any solar power gen. Stirling receivers are typically about 90% efficient in transferring energy delivered by the concentrator to the engine.
Considerations regarding the use of dishstirling systems. Pdf design, analysis and optimization of a solar dishstirling. The dishstirling system consists of three main components. Thus, in addition to the analysis of the system, it includes an analysis of energy received, considering periods where auxiliary energy can be implemented. His invention combines a heat engine, such as a stirling cycle engine, with a solar dish collector to produce electricity. In a dishstirling system, a dish collector may be used to focus solar energy to supply power. Jun 12, 2014 sun powered stirling engine with 2 axis autotracking. This paper presents an investigation on finite time thermodynamic ftt evaluation of a solar.
So far, dish stirling systems have been individual units handmade by expert engineers, with corresponding prototypelevel costs. The energy system analyzed in this project, solar dishstirling system, is one of the most efficient energy systems in the world. A special case of the third type of system, a dishstirling system, is the subject of this paper. The resulting journal of energy in southern africa vol 26 no 1 february 2015 55 optimization analysis of solarpowered average temperature stirling. The suncatcher is a 25kilowattelectrical kwe solar dish stirling system which consists of a unique radial solar concentrator dish structure that supports an array of curved glass mirror facets, designed to automatically track the sun, collect and focus, that is, concentrate, its solar energy onto a patented power conversion unit pcu. The viability of dish stirling csp was demonstrated in. The cost of cheap reflectors for concentrating dish systems. A compendium of solar dishstirling technology technical.
In this arrangement it is necessary to adopt a heat transfer fluid capable of transmitting the useful power from the receiver to the hot spring in the stirling engine head. Solar energy is a green and attractive renewable energy source that can be converted for power generation. However, dishstirling systems are quite heavy with very high initial costs. A compendium of solar dishstirling technology osti. The dish stirling system is a renewable energy source that generates power by using parabolically arranged mirrors to reflect sunlight onto a small focal receiver, thereby heating a gas chamber connected to a piston and drive shaft.
The dish stirling system dish stirling systems transfer concentrated solar radiation with high efficiencies into electrical energy. Also, because of the high pressure 20 mpa and high temperature 700oc, the engine are expensive to make. Dishengine systems use a parabolic dish of mirrors to direct and concentrate sunlight onto a central engine that produces electricity. Optical design of a solar parabolic concentrating collector based on trapezoidal reflective petals 715 is carried out to improve the overall performance of system.
When comparing with the internal combustion engine, the stirling engine offers possibility for having high efficiency engine with less exhaust emissions. Solar parabolic dish stirling engine system design, simulation, and thermal analysis article pdf available in energy conversion and management 126. Sanders, chair this dissertation discusses the design and development of a distributed solarthermal. Parabolic solar concentrator tracking system solar heat exchanger receiver. A background of modeling of dish stirling solar thermal power generation dustin howard, student member, ieee and ronald g. The trouble with dish stirling csp new energy update. The size of the concentrator is determined by its engine.
Finally, the s260 stirling engine was installed on the focal position of the dish concentrator and then the net output power date of the 38 kw dscsp system was tested. This paper brings together the thermal, electric, and control system models of the various components within the dish stirling system. Maury white s presentation discusses infinia s 30kw maintenancefree solar dish engine. Solar dish stirling system and its economic prospect in. Pdf solar parabolic dish stirling engine system design, simulation. Essentially the system consists of the following components. It focuses all the sunlight that strikes the dish up onto a single point above the dish, where a receiver captures the heat and transforms it into a useful form. Department of energy conservation and renewable energy office of solar energy conversion. Schreiber national aeronautics and space administration lewis research center cleveland, ohio 445 work performed for u. Ses dish stirling system artists rendering of ses dish stirling system power plant figure b44c connected actions, stirling energy systems solar two project components sunrise powerlink project b. Status of the advanced stirling conversion system project.
Development status and operating experience for each system and an. These systems are ideal for standalone applications, decentralized applications and offgrid systems, and in cluster with install capacity from 0. An analysis of the daily, monthly, and annual performances of the sds system was performed. The solar dishstirling plants are a hybrid solution to produce energy. Solar dish stirling system has proved to be the most efficient way to generate electricity using solar energy. They so far have the highest heatelectricity conversion efficiencies among all csp designs up to 30 %. Status of the advanced stirling conversion system project for 25 kw dish stirling applications. A dishstirling system comprises a parabolic dish concentrator, a thermal receiver, and a stirling enginegenerator located at the focus of the dish. Stirling engine technology for parabolic dishstirling system.
Technical information on the engines used or to be used in dishstirling systems is also presented. Stirling engine which is mounted on the focal point of the dish absorbs the heat energy from the receiver and converts it to mechanical energy. Status of the advanced stirling conversion system project for 25 kw dish stirling applications richard k. The system advisor model sam is a performance and financial model designed to estimate the cost of energy for gridconnected power projects based on installation and operating costs and system design in order to facilitate decision making for people involved in the renewable energy industry. Modeling of dishstirling solar thermal power generation brain2grid. This report surveys the emerging dish stirling technology. Since solar dishstirling systems are modular, each system is a selfcontained power generator, which can be assembled into plants ranging in size from kilowatts to 10mw see figure 1. A solar powered stirling engine is a heat engine powered by a temperature gradient generated by the sun. This study uses consistent terminology to document the. A summary of the dynamic model of a dish stirling system and its control unit for power grid integration studies is provided. Control of receiver temperature and shaft speed in dish. Optimization analysis of solarpowered average temperature.
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. Due to the increasing commercialization of this technology, the need for maximizing overall efficiency, and minimizing losses and cost has become an important area of interest for researchers. Engines the engine in a dishengine system converts heat to mechanical power in a manner similar to conventional engines, that is by compressing a working fluid when it is cold, heating the compressed working fluid, and then expanding i t. Design, analysis and optimization of a solar dishstirling system. Several different dish stirling systems have been built and operated during the past 15 years. The imperial valley solar and calico projects would have summed almost. Thanks and congratulations for the rebirth of dish stirling csp. The dishstirling system is a renewable energy source that generates power by using parabolically arranged mirrors to reflect sunlight onto a small focal receiver, thereby heating a gas chamber connected to a piston and drive shaft.
In this regard, all of heat losses in a dishstirling system were calculated, then, the output network of the stirling engine was computed, and. These goals require cost reduction associated with every part of the system. Sun powered stirling engine with 2 axis autotracking. The dishstirling system is comprised a parabolic dish collector and a stirling heat engine. In addition, the engine in a dishengine system converts heat to. Department of energy conservation and renewable energy office of solar heat technologies. Mar 15, 2020 a dish stirling system includes two components. A solar dishstirling sds system was experimentally established and thermodynamically modeled.
So far, dishstirling systems have been individual units handmade by expert engineers, with corresponding prototypelevel costs. In addition, the engine in a dish engine system converts heat to. Various components of the system need designing and. Efficiency for the stirling engine approaches maximum theoretical efficiency for any engine, known technically as carnot cycle efficiency. 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. Modeling and simulation for different parabolic dish stirling engine designs have been carried out using matlab.
Several different dishstirling systems have been built and operated during the past 15 years. Operating the hybrid dish stirling system for several months and gathering operational, efficiency, and reliability data. To analyze the performance of the system a thermodynamic model was developed to predict the thermal efficiency of the dishstirling engine. This report surveys the emerging dishstirling technology. Design of the collector of a solar dishstirling system ieee xplore. The effect of solar dish design features and factors such as material of the reflector concentrators, the shape of the reflector. Impact of variable solar radiation on power flow for dish. Dish stirling systems track the sun and focus solar energy into a cavity receiver where it is absorbed and transferred to a heat enginegenerator. Pdf solar parabolic dish stirling engine system design. Performance of dishstirling csp system with dislocated. A handful of dishstirling system designs, comprising different solar concentrators and stirling enginegenerators, are currently and successfully demonstrating the technical feasibility of solar power generation for extended periods of time.
In this paper, a dishstirling concentrating solar power csp system was examined in which the engine works no longer as a receiver but is displaced away from it. Optimization of output power and thermal efficiency of. Modeling and simulation of solar dish stirling systems. Performance analysis methodology for parabolic dish solar. Engines the engine in a dish engine system converts heat to mechanical power in a manner similar to conventional engines, that is by compressing a working fluid when it is cold, heating the compressed working fluid, and then expanding i t. Feasibility study of dishstirling power systems in. Stirling engines for lowtemperature solarthermal electric. A validated energy model of a solar dishstirling system. Journal of multidisciplinary engineering science and technology, 2015.
Most designs focus on concentrators and engines obtaining a high performance while remaining robust. The drive shaft powers a generator which produces electricity to be distributed to a grid. It takes into account the periods where direct irradiation is under nominal performance value of the system, such as. By jason deign it is probably fair to say solar thermal dish stirling technology had its finest moment around october 2010. However, dish stirling systems are quite heavy with very high initial costs. Solarelectric dish stirling system development unt digital. Installing and operating a demonstration solar dish stirling system in sacramento to characterize performance and demonstrate reliability. Project description january 2008 draft eireis aspen environmental group sunrise powerlink project source. It documents using consistent terminology the design characteristics of dish concentrators, receivers, and stirling engines applicable to solar electric power generation.