Researchers Map Optimal Layouts for Multi-Tower Solar Fields

A new study in Renewable Energy examines how dual- and triple-tower heliostat fields can be arranged to maximize efficiency as concentrated solar plants grow larger.

This article was drafted with AI assistance from multiple sources and was reviewed and approved by a human editor before publication.

As concentrated solar power plants push toward ever-larger scales, engineers are increasingly looking beyond single-tower designs. A study published in the journal Renewable Energy investigates how fields serving two or three towers can be laid out to squeeze the most performance from their mirror arrays.

The work, authored by Zhaoran Xu and Liqiang Duan, argues that bigger solar tower systems require dual-tower and triple-tower configurations capable of collecting far more heat than conventional setups. To find the best geometry, the researchers tested two strategies for spacing the towers apart and tracked how field efficiency changed.

One of the paper's central findings concerns how closely the two mirror subfields should sit. According to the authors, overall performance reaches its maximum point when the neighboring subfields are positioned so that they just barely touch, rather than overlapping heavily or being pushed far apart.

The team also examined how the rules for assigning individual heliostats to a given receiver influence output. They report that choosing the right receiver-selection approach lifts efficiency in the zones where the two subfields meet, an area that has traditionally been difficult to optimize.

Orientation proved to be another important variable. By turning the dual-tower field in steps of 30 degrees, the researchers generated six distinct layouts and compared each one. Their calculations show that placing the two towers along an east-west axis yields the best efficiency of the configurations tested.

For systems using three towers, the study puts forward three candidate geometries, described as sequential, pyramid, and diamond arrangements. After comparing them, the authors conclude that the pyramid-type layout delivers the highest efficiency of the three.

The research appears in Volume 271 of Renewable Energy as article number 126024, and adds to a growing body of engineering work aimed at guiding the design of larger solar tower installations.