The solstice software is an executable producing flux maps and other. 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. Visual hflcala software tool for layout and optimisation. In this article, a new model and a biomimetic pattern for heliostat field layout optimization are introduced. Mar 09, 2016 then, shading and blocking are minimized by optimization of the relative orientations. Thermoeconomic optimization of hybrid combined power cycles. Only with the inclusion of these two effects and others in the calculation we will find the. Constrain heliostat field positions with customizable land shapes. Heliostat field layout optimization with evolutionary algorithms richter et al.
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. Optimizing heliostat fields is very important because heliostats provide reflected solar energy to receivers and account for nearly half of the total plant cost. These data are processed into a user defined profile udp which can be patched to a surface in the fluent solver. Although patternbased layouts and iterative deployment are popular heuristics to simplify the problem. 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. 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. May 10, 2018 the heliostat field of solar power tower plants can suppose up to 50% of investment costs and 40% of energy loss. Model a variety of heliostat optical configurations including multiple facets and aimingcanting schemes.
Energies free fulltext study on optimized dispatch and. It can be reduced by increasing the distance between heliostats, but this increases heliostat field size. 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. The target may be a physical object, distant from the heliostat, or a direction in space. This document provides an overview of our heliostat related research and development. 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. The heliostat field is a key factor for both the initial deployment costs and for taking the maximum benefit from the incoming solar energy. The best possible layout of the heliostats field can make the difference.
A new code for the design and analysis of the heliostat field. These new algorithms enable increased heliostat density that yields higher energy output per square meter of. 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. 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. Visual hflcal a software tool for layout and optimisation of. On using a gradientbased method for heliostat field layout.
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. The heliostat field forms a significant part of the cost of a csp plant, and thus drew our attention for cost reduction opportunities. Additionally, optimization of heliostat canting, is presented as an application of the heliostat layout optimization model. Optimizing the heliostat field layout by applying stochastic populationbased algorithms 23 its design variables.
The method is intended for further performance improvement after initial layout with a standard heliostat field layout tool. A new computationally e cient model and biomimetic layout corey j. Softwarecontrolled field of mirrors concentrate sunlight on a boiler mounted on a central tower. Heliostat field design for solar thermochemical processes robert pitzpaal dlr solar research based on. The method is intended for the further performance improvement after initial layout with a standard heliostat field layout tool. Heliostat field layout improvement by nonrestricted. Stellio heliostat sbpray field layout optimization software. An optimization approach to the design of multisize. The optimization of aiming points of the heliostat is an important aspect for the tower csp control. A heliostat from helios, the greek word for sun, and stat, as in stationary is a device that includes a mirror, usually a plane mirror, which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the suns apparent motions in the sky. During the construction and operation of the heliostat field, the software can be used to improve commissioning and maintaining efficiency.
Based on a genetic algorithm, it is possible to optimize the position of the heliostats in a solar field to maximize their performance. These new algorithms enable increased heliostat density that yields higher energy output per square meter of the solar field. In this context, two stochastic populationbased algorithms, called micraga and uego, are applied to solve the problem at hand. Although patternbased layouts and iterative deployment are popular heuristics to simplify the problem, they limit flexibility and might be. Software controlled field of mirrors concentrate sunlight on a boiler mounted on a central tower. Heliostat field layout optimization for a central receiver shanley lawrence lutchman 7khvlv suhvhqwhg lq sduwldo ixoilophqw ri wkh uhtxluhphqwv iru wkh ghjuhh ri 0dvwhu ri qjlqhhulqj 0hfkdqlfdo lq wkh yri qjlqhhulqj dw by supervisor. Brightsource launches next generation solar field technologies. 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. The heliostat field of solar power tower plants can suppose up to 50% of investment costs and 40% of energy loss. Optimization of central receiver concentrated solar thermal. Review of software for optical analyzing and optimizing. 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. Optimization of central receiver concentrated solar.
The heliostat field boundary is constrained by the tower height. Mar 21, 2016 the latest version of sfincs brightsources proprietary optimization and control software maximizes project performance and power production efficiencies. Using the site selection model, suitable sites are located based on heliostat field efficiency and average annual insolation. Consequently, numerous software packages have been developed through the years to help designers in the designing process of this kind of facilities. The latest version of sfincs brightsources proprietary optimization and control software maximizes project performance and power production efficiencies. The biomimetic software tool, presented in 14, is an innovative and promising heuristic approach to heliostat field optimization. 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. The software supports heliostat commissioning, maintaining and failure solving on androidpowered cellphones and tablets, and it also provides access to historical data. A publication following this methodology can be found in the reference. Solar power tower integrated layout and optimization tool nrel.
Visual hflcal a software tool for layout and optimisation of heliostat fields proceedings of 15th international solarpaces symposium 2009 in. Heliostat field layout optimization with evolutionary. Using the site selection model, suitable sites are located based on heliostat. Heliostat field layout optimization with evolutionary algorithms. 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. Sep 19, 20 a new method for the heliostat field optimization is presented. Unfortunately, obtaining an optimal field requires facing a complex nonconvex, continuous, largescale, and constrained optimization problem. Heliostat field optimization 3 is crucial for the design of an optimized solar power tower system. Heliostat field layout using nonrestricted optimization. Spillage estimation in a heliostats field for solar field optimization. Review of software for optical analyzing and optimizing heliostat fields. Introduction heliostat field optimization can be done in at least three different ways.
Easily define complex landboundary geometry with software that generates kml files e. In fact, the software implements radial stagger, radial cornfield, northsouth cornfield and northsouth stagger as core design patters to propose new fields. Optimization of a heliostat field layout on annual basis using a. Heliostat field layout optimization for a central receiver by. Sep 14, 2012 a new heliostat field optimization method is presented. 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. In section 2, we describe the main ingredients a ecting the performance of the spt system. 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. Introduction solar systems need large dedicated areas. 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. Analysis of heliostats rotation around the normal axis for. For example, a program designed to optimize a heliostat field would change the.
Design of a parallel genetic algorithm for continuous and. Optimizing the heliostat field layout by applying stochastic. Heliostat field layout optimization for a central receiver. 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. During the field optimization heliostats are repositioned without or with little restrictions. The cost models in windelsol were developed from actual and estimated costs from conceptual crs systems. A new method for the heliostat field optimization is presented. 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. Solar power tower integrated layout and optimization tool. Their structure seems to be especially suitable to solve it. 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. 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. Heliostat field design for solar thermochemical processes. Only with the inclusion of these two effects and others in the calculation we will find the optimised heliostat field layout.
A fourth method involves a hybridization of any two of these methods. Hflcal is a program for layout and optimization of heliostat fields of central receiver systems crs based on annual performance calculation. Looking for a free heliostat field optimization software. Re field has thousands of square meters of heliostats that concentrate solar energy on the receiver of the power plant. 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. In the new code, a new method for the heliostat field layout is proposed based on the edge ray principle of nonimaging optics. A classical approach to analysis and layout optimization on free shipping on qualified orders. Heliostat aiming points optimization for concentrated solar. The target may be a physical object, distant from the heliostat, or a. For this reason, among others, heliostat field optimization remains an active research field. Spillage estimation in a heliostats field for solar field. An optimization approach to the design of multisize heliostat fields e. This is achieved amongst other factors by minimizing the losses of the solar.
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