Although patternbased layouts and iterative deployment are popular heuristics to simplify the problem, they limit flexibility and might be. During the field optimization heliostats are repositioned without or with little restrictions. Visual hflcal a software tool for layout and optimisation of heliostat fields proceedings of 15th international solarpaces symposium 2009 in. The optimizer is not limited to stubbornly optimise the energy output of a field but all simulation data such as individual heliostat performance or the energy cast on individual receiver quadrants are available and can feed into the objective function to be optimised. These new algorithms enable increased heliostat density that yields higher energy output per square meter of. Design calculations of heliostat field layout for solar thermal power generation proceedings of 105th ththe iier international conference, bangkok, thailand, 5 6th june 2017 51 about 40 km, the atmospheric transmission efficiency can be calculated simply as a function of the distance between the heliostat and the receiver in meters as follow 7. Optimization of a heliostat field layout on annual basis. Robert pitzpaal, nicolas bayer botero, aldo steinfeldheliostat field layout optimization for hightemperature solar thermochemical processingsolar energy, volume 85, issue 2, february 2011, pages 334343 2 classification of crstools. Their structure seems to be especially suitable to solve it.
In particular, we obtain a very simple and exact expression of the maximal energy collectable by the solar field and present effective strategies to reach such maximum. An optimization approach to the design of multisize heliostat fields e. In section 3, our methodology to solve the problem is explained. Energies free fulltext study on optimized dispatch and. Mar 21, 2016 the latest version of sfincs brightsources proprietary optimization and control software maximizes project performance and power production efficiencies. Thermoeconomic optimization of hybrid combined power cycles. Hflcal is a program for layout and optimization of heliostat fields of central receiver systems crs based on annual performance calculation. During the construction and operation of the heliostat field, the software can be used to improve commissioning and maintaining efficiency. Using the site selection model, suitable sites are located based on heliostat.
The target may be a physical object, distant from the heliostat, or a direction in space. In the new code, a new method for the heliostat field layout is proposed based on the edge ray principle of nonimaging optics. Spillage estimation in a heliostats field for solar field. A new code for the design and analysis of the heliostat field layout for power tower system is developed. Heliostat field optimization is generally performed by using. Only with the inclusion of these two effects and others in the calculation we will find the. Heliostat aiming points optimization for concentrated solar. Spillage estimation in a heliostats field for solar field optimization. For example, a program designed to optimize a heliostat field would change the. Re field has thousands of square meters of heliostats that concentrate solar energy on the receiver of the power plant. A new method for the heliostat field optimization is presented. The model, described and validated herein, includes a detailed calculation of the annual average optical efficiency accounting for cosine losses, shading and blocking, aberration and atmospheric attenuation. Easily define complex landboundary geometry with software that generates kml files e. Optimizing the heliostat field layout by applying stochastic populationbased algorithms 23 its design variables.
Consequently, numerous software packages have been developed through the years to help designers in the designing process of this kind of facilities. Heliostat field design for solar thermochemical processes. Design of a parallel genetic algorithm for continuous and. Heliostat field layout optimization for a central receiver. Therefore, in this paper, in order to optimize the heliostat field to obtain the highest energy collected per unit cost ecuc, a mathematical model of a heliostat field and a hybrid algorithm combining particle swarm optimization algorithm and genetic algorithm psoga are coded in matlab and the heliostat field in lhasa is investigated as an.
In this article, a new model and a biomimetic pattern for heliostat field layout optimization are introduced. Sep 14, 2012 a new heliostat field optimization method is presented. Re software is based on raytracing techniques to evaluate the heliostat field optical efficiency and directly relies on parametric optimization to generate optimal field designs. For this reason, among others, heliostat field optimization remains an active research field. It can be reduced by increasing the distance between heliostats, but this increases heliostat field size. Though the heliostat grouping method and database were designed to reduce the running time of the optimization program in this study, an efficient search program was still needed to completed the optimization strategy in the relatively shorter control period of a heliostat field. One of the most important factors in such an optimization is maximization in accordance with material limitations of the annual absorbed energy of the receiver. A control strategy leading to a more efficient operation of the field by maximizing the power while keeping the receiver in operating conditions may be of great value.
Heliostat field layout optimization with evolutionary algorithms. The latest version of sfincs brightsources proprietary optimization and control software maximizes project performance and power production efficiencies. This is achieved amongst other factors by minimizing the losses of the solar. The solstice software is an executable producing flux maps and other. In fact, the software implements radial stagger, radial cornfield, northsouth cornfield and northsouth stagger as core design patters to propose new fields. Since the heliostat field is large, the most efficient method of simulating the field is by using raytracing software to determine energy and ray direction profiles on a virtual surface. An optimization approach to the design of multisize. Visual hflcala software tool for layout and optimisation. Review of software for optical analyzing and optimizing heliostat fields. May 10, 2018 the heliostat field of solar power tower plants can suppose up to 50% of investment costs and 40% of energy loss. The cost models in windelsol were developed from actual and estimated costs from conceptual crs systems. Based on a genetic algorithm, it is possible to optimize the position of the heliostats in a solar field to maximize their performance.
These data are processed into a user defined profile udp which can be patched to a surface in the fluent solver. Unfortunately, obtaining an optimal field requires facing a complex nonconvex, continuous, largescale, and constrained optimization problem. The software supports heliostat commissioning, maintaining and failure solving on androidpowered cellphones and tablets, and it also provides access to historical data. Optimization of a heliostat field layout on annual basis using a. The heliostat field forms a significant part of the cost of a csp plant, and thus drew our attention for cost reduction opportunities. The heliostat field is a key factor for both the initial deployment costs and for taking the maximum benefit from the incoming solar energy. Optimization control software brightsource solar field integrated control system is the proprietary optimization software to manage heliostat positioning and optimize concentrated sunlight on the boiler. Optimizing the heliostat field layout by applying stochastic. Introduction heliostat field optimization can be done in at least three different ways. Solstice software introduction overview installation first execution of solstice software study of a fresnel mirror system study of heliostat field in solar tower introduction the solstice software is an executable producing flux maps and other data in ascii based on input files. To this aim, a small solar field composed of 150 rectangular flat heliostats has been considered, and its performances with and without the proposed optimization have been computed and compared for a wide variety of cases. The heliostat field boundary is constrained by the tower height.
Heliostat field layout optimization for a central receiver by. Noone mit, manuel torrilhon rwth and alexander mitsos mit, department of mechanical engineering massachusetts institute of technology 77 massachusetts ave cambridge, ma 029, usa center for computational engineering science rwth aachen. The best possible layout of the heliostats field can make the difference. A new code for the design and analysis of the heliostat field. A new computationally e cient model and biomimetic layout corey j. Stellio heliostat sbpray field layout optimization software. The target may be a physical object, distant from the heliostat, or a. Optimizing heliostat fields is very important because heliostats provide reflected solar energy to receivers and account for nearly half of the total plant cost. In this context, two stochastic populationbased algorithms, called micraga and uego, are applied to solve the problem at hand. Introduction solar systems need large dedicated areas. Only with the inclusion of these two effects and others in the calculation we will find the optimised heliostat field layout. Heliostat field optimization 3 is crucial for the design of an optimized solar power tower system. A classical approach to analysis and layout optimization on free shipping on qualified orders. Introduction the computer program hflcal was developed by michael kiera at the german company interatom during the project gast gascooled solar tower in the early 1980s 1.
Heliostat field design for solar thermochemical processes robert pitzpaal dlr solar research based on. Software controlled field of mirrors concentrate sunlight on a boiler mounted on a central tower. Constrain heliostat field positions with customizable land shapes. Using the site selection model, suitable sites are located based on heliostat field efficiency and average annual insolation. During the field refinement, the heliostats are repositioned around their original position, without or with little restrictions. On using a gradientbased method for heliostat field layout. Optimization of central receiver concentrated solar. Solar power tower integrated layout and optimization tool nrel. However, the optimization of heliostat field layout is a complicated process, in which thousands of heliostats have to be considered for any heliostat field optimization process.
Looking for a free heliostat field optimization software. Brightsource launches next generation solar field technologies. Heliostat field layout using nonrestricted optimization. The software is based on raytracing techniques to evaluate the heliostat field optical efficiency and directly relies on parametric optimization to generate optimal field designs. These new algorithms enable increased heliostat density that yields higher energy output per square meter of the solar field. A master of science thesis in mechanical engineering by mohammad saghafifar entitled, thermoeconomic optimization of hybrid combined power cycles using heliostat field collector, submitted in january 2016. A publication following this methodology can be found in the reference. Of all the renewable power generation technologies, solar tower power system is expected to be the most promising technology that is capable of largescale electricity production. Analysis of heliostats rotation around the normal axis for. Solar power tower integrated layout and optimization tool.
I wanna check my model and code of calculating heliostat field efficiency, i got some data about solar two project, but i cant find. Heliostat field layout improvement by nonrestricted. The optimization of aiming points of the heliostat is an important aspect for the tower csp control. The method is intended for further performance improvement after initial layout with a standard heliostat field layout tool. Heliostat field layout optimization with evolutionary. The biomimetic software tool, presented in 14, is an innovative and promising heuristic approach to heliostat field optimization. Heliostat field layout optimization with evolutionary algorithms richter et al. Additionally, optimization of heliostat canting, is presented as an application of the heliostat layout optimization model. Softwarecontrolled field of mirrors concentrate sunlight on a boiler mounted on a central tower. The method is intended for the further performance improvement after initial layout with a standard heliostat field layout tool. Visual hflcal a software tool for layout and optimisation. Model a variety of heliostat optical configurations including multiple facets and aimingcanting schemes. Visual hflcal a software tool for layout and optimisation of. A fourth method involves a hybridization of any two of these methods.
In section 2, we describe the main ingredients a ecting the performance of the spt system. Mar 09, 2016 then, shading and blocking are minimized by optimization of the relative orientations. Review of software for optical analyzing and optimizing. The heliostat field of solar power tower plants can suppose up to 50% of investment costs and 40% of energy loss.
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