Staggered Heliostat Array Layouts for Multi-Tower Solar Plants
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Solution Overview
Problem
Central receiver solar power plants face inefficiencies in sunlight reflection due to heliostat layout complexities and poor land utilization, leading to increased installation costs and reduced economic performance.
Innovation Solution
A heliostat array arrangement in linear rows with staggered positions, forming a substantially polygonal perimeter, allowing for efficient land use and simplified installation, with each heliostat equipped with a mirror to reflect sunlight to a tower-mounted receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If heliostats are arranged in multiple arc patterns around the tower, then sunlight reflection efficiency is improved, but installation complexity and cost increase
Solution Approach 1:
The heliostat array is divided into multiple discrete arcs spaced at specific intervals around the tower, with each arc containing a defined number of heliostats. This segmentation allows for standardized installation units that reduce overall complexity while maintaining effective sunlight reflection coverage of the receiver surface.
2Loss of energy
If heliostats are arranged in circular or circular sector patterns, then sunlight collection is improved, but land utilization decreases
Solution Approach 1:
The patent transitions from traditional two-dimensional circular arc arrangements to a three-dimensional configuration where multiple arcs are stacked at different radial distances from the tower and at different angular positions. This dimensional expansion allows the heliostat array to cover a rectangular land footprint more efficiently while maintaining effective sunlight reflection.
3Loss of energy
If heliostats are arranged in staggered configurations across multiple arcs, then sunlight reflection coverage is improved, but installation difficulty increases
Solution Approach 1:
The patent employs repeated modular units where identical heliostat configurations are copied across multiple arcs and positions around the tower. Each arc contains the same number of heliostats arranged in the same pattern, allowing for standardized installation procedures to be replicated rather than requiring custom installation for each position, thereby reducing overall installation difficulty.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the economic performance of solar power plants by improving sunlight reflection efficiency, reducing installation complexities, and optimizing land use, thereby lowering costs and increasing energy collection efficiency.
Implementation Method 1
Each heliostat has a mirror whose orientation is adjusted continuously to reflect sunlight toward the receiver
Data Source
AI summary
A solar power plant includes central receiver modules arranged in a regular pattern. Each central receiver module includes a tower, a central receiver mounted on the tower, and a heliostat array bounded by a polygon. The heliostat array includes heliostats with mirrors for reflecting sunlight to the central receiver. The heliostats are grouped in linear rows and each of the rows is parallel to another row. The locations of the heliostats are staggered between adjacent rows. The power plant also includes a power block for aggregating power from the central receivers and power conduits for transferring power from the central receivers to the power block.