Analysis and improvement of solar flux distribution inside a cavity receiver based on multi-focal points of heliostat field

Yu, Qiang; Wang, Zhifeng; Xu, Erqi

doi:10.1016/j.apenergy.2014.09.008

Cited by 64 publications

(22 citation statements)

References 18 publications

(9 reference statements)

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“…The overall goal is the same, but the descriptiveness of the objective function of the optimization problem is improved. Yu et al [24] use a TABU search to minimize flux peaks and spillage by following a combinatorial formulation. Heliostats are grouped to reduce the search space, but the shape of the receiver is considered in depth to distribute the aim points.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The work in [25] is an exception example because the authors use ray-tracing and reduce its time impact by storing partial results. Regardless, creating databases with pre-computed information is also an option with analytical strategies [10,11,14,24]. This work relies on an analytical model of the target field.…”

Section: On Predicting the Behavior Of The Target Fieldmentioning

confidence: 99%

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A Simple and Effective Heuristic Control System for the Heliostat Field of Solar Power Tower Plants

Cruz¹,

Álvarez²,

Redondo³

et al. 2020

ACTA POLYTECH HUNG

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Solar power tower plants use large arrays of mirrors, known as heliostats, to concentrate solar radiation on their receiver and heat the working fluid inside them. However, receivers must not be under thermal stress. Otherwise, their life expectancy is reduced, which affects the cost and viability of production plant. Controlling the flux distributions on receivers requires selecting the active heliostats and their target points. It is a challenging task that should not be under the responsibility and expertise of human operators only. This work defines a closed-loop controller to keep the setpoint or desired flux map under certain conditions. It combines real measurements and an ad-hoc analytical model of the target field with a set of heuristic rules that covers how to activate, deactivate, and re-aim heliostats. The proposed system has been applied to a model of the CESA-I field at the Solar Platform of Almería. The open-source ray-tracer Tonatiuh represents the reality. The initial operation point has been determined with a theoretical flux distribution optimizer. According to the experimentation, the controller improves the initial and modelbased flux distribution by raising its power from 708.4 to 736.4 kW (with a setpoint of 739.6 kW).

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Section: Literature Reviewmentioning

confidence: 99%

Section: On Predicting the Behavior Of The Target Fieldmentioning

confidence: 99%

A Simple and Effective Heuristic Control System for the Heliostat Field of Solar Power Tower Plants

Cruz¹,

Álvarez²,

Redondo³

et al. 2020

ACTA POLYTECH HUNG

View full text Add to dashboard Cite

show abstract

“…The main purpose of heliostat aiming strategy is to minimize/eliminate the instances of local hot spots by evenly distribute the solar flux on the aperture and lengthen the receiver lifetime. There are several studies available in the literature focusing on the possible heliostat aiming strategies and its influence on temperature profile and flux distribution including works by Besarati et al, Yu et al, and Salomé et al It is recommended to refer to the work by Grobler and Gauché for a complete overview of aiming strategies in heliostat field collectors.…”

Section: Technologymentioning

confidence: 99%

A concise overview of heliostat fields-solar thermal collectors: Current state of art and future perspective

Gadalla

Saghafifar

2018

Int J Energy Res

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Summary Heliostat field or solar tower collector is one of the most promising concentrated solar power technologies available in the market. Due to its high operating temperature, heliostat field collector can be implemented in a wide range of applications from solar power generation to industrial commodity production. There are several currently operating, under construction, and planned heliostat fields around the world. In this paper, a brief overview of the current state of the art, applications, assessment methods, future perspective, and methods of improvement are discussed.

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“…[79] Figure 17 (Color online) Schematic diagram of absorber tube and secondary reflector [79] 图 18 (网络版彩色)吸热管相对辐射能量分布 [79] Figure 18 (Color online) Relative solar flux distribution on the absorber tube [79] 式、优化反射镜几何结构与光学参数、合理设计反射镜跟踪与瞄准方式等方法开展了具有单管腔式吸热器系统(图19)的光学性能优化研究 [74] . [81,82] , 镜面尺寸多在20~150 m 2 范围内 [83,84] .…”

Section: 其次非均匀能流分布造成的非均匀温度会在吸热mentioning

confidence: 99%

“…及运行参数. Figure 25 (Color online) Heliostat [82] 图 26 (网络版彩色)管式吸热器 [85,86] . (a) 腔体吸热器; (b) 外露吸热器 Figure 26 (Color online) Tubular solar receiver [85,86] .…”

Section: 为目前主要的塔式电站吸热器形式、传热流体类型以mentioning

confidence: 99%

Non-uniform characteristics of solar flux distribution in the concentrating solar power systems and its corresponding solutions: A review

Wang¹,

Du²,

Qiu³

et al. 2016

Chin. Sci. Bull.

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Analysis and improvement of solar flux distribution inside a cavity receiver based on multi-focal points of heliostat field

Cited by 64 publications

References 18 publications

A Simple and Effective Heuristic Control System for the Heliostat Field of Solar Power Tower Plants

A Simple and Effective Heuristic Control System for the Heliostat Field of Solar Power Tower Plants

A concise overview of heliostat fields-solar thermal collectors: Current state of art and future perspective

Non-uniform characteristics of solar flux distribution in the concentrating solar power systems and its corresponding solutions: A review

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