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A modified TSE index and its application in Zhoushan waters

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  • Dai, Peng
  • Huang, Zhen
  • Zhang, Jisheng

Abstract

The tidal stream energy potential in the Zhoushan waters is evaluated using advanced numerical modeling techniques. The Tidal Stream Exploitability (TSE) index, which was previously applied to depth-limited regions, is adapted for deeper waters and omni-directional flows. The Xihoumen Channel, located to the west of Zhoushan Island, emerges as a prime candidate with significant energy potential. A spatial and temporal analysis is conducted to assess the power density characteristics of this site. The surface areas where tidal power densities exceed 0.06 kW/m2 and 4.0 kW/m2 are 88.90 km2 and 0.38 km2, respectively. At the peak TSEn point, the annual power output reaches 25.18 MWh/m2. The power density remains below 2 kW/m2 for approximately 350 h each month. The current velocity exceeds 1.5 m/s in most parts of the Xihoumen Channel, with only minor flow asymmetry. The channel exhibits minimal direction misalignment, indicating a predominantly rectilinear flow. Ten Seagen-S 2 MW turbines are deployed in a staggered arrangement at the highest TSEn location. The mean value of turbine efficiency ηss, availability factor Af, capacity factor Cf and electrical energy output during a spring-neap cycle are 0.37, 0.72, 0.47 and 245.41 MWh respectively.

Suggested Citation

  • Dai, Peng & Huang, Zhen & Zhang, Jisheng, 2026. "A modified TSE index and its application in Zhoushan waters," Renewable Energy, Elsevier, vol. 256(PF).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pf:s0960148125019913
    DOI: 10.1016/j.renene.2025.124327
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