the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
| 28 Aug 2025
Experimental Study of Regenerative Wind Farms Featuring Enhanced Vertical Energy Entrainment
Abstract. This study presents the experimental validation of regenerative wind farms (RGWFs), a novel wind farm concept designed to enhance overall wind farm performance. RGWFs employ Multi-Rotor Systems with Lifting devices (MRSLs), an innovative wind energy harvesters engineered to promote strong vertical energy entrainment, thereby accelerating wake recovery. In the experiments, MRSLs are scaled for wind tunnel testing, with their rotors modeled using porous disks and their lifting devices represented by airfoils. The tested RGWFs comprise up to three by three MRSLs. Flow quantities within RGWFs and aerodynamic loads on MRSLs are measured using volumetric particle tracking velocimetry and strain gauges, respectively. Compared to conventional wind farms, flow analysis indicates that RGWFs significantly enhance vertical energy entrainment, as evidenced by a more than 200 % increase in thrust on second-row-MRSLs. These experimental results, consistent with previous numerical predictions, highlight the promising potential of RGWFs.
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Status: final response (author comments only)
- RC1: 'Comment on wes-2025-156', Anonymous Referee #1, 20 Sep 2025
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RC2: 'Comment on wes-2025-156', Anonymous Referee #2, 22 Oct 2025
The paper deals with the study of the wake flow of a multi rotor system with and without lifting devices.
The results are interesting and the analysis is convincing.
The paper is almost ready for publication, only a couple of small observations:Â
 - Section 2.2 - line 67: a typo for multi-rotor system
 - Section 2.4 - line 122: the measurement devices are not clearly reported. The strain gauges are 10N range with a precision of 0.1N? Did you checked for a better calibration? Is the frequency of the horizontal strain gauge 1000Hz or 1Hz? is the frequency of the vertical bench scale only 1Hz?ÂCitation: https://doi.org/10.5194/wes-2025-156-RC2
Data sets
Supplementary benchmark data and experimental setup for "Experimental Studies of Regenerative Wind Farms Featuring Enhanced Vertical Energy Entrainment" YuanTso Li et al. https://data.4tu.nl/private_datasets/6uSvxxyviKSUyqZaDS-Cspt2liwQzxrPbDppsKQrmP8
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The authors present a detailed wind tunnel study of the novel regenerative wind farm concept using lifting devices. the experiments are meticulously descriebd and the authors are commended on this. The study is relevant and novel. It does have certain limitations, which the authors highlight in earnest. The manuscript is well written overall and easy to follow.
My main comments are below while further, more minor, comments can be found in the attached file.