Analysis of the work performance of the lift mode crosswind kite power system based on aerodynamic parameters

• Published in: Energy reports Vol. 8; pp. 40 - 52
• Main Authors: Yan, Cuicui, Zhang, Honglin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2022; Elsevier
• Subjects: Aerodynamic coefficient; Airborne wind energy; Crosswind kite power system; Induction factor; Lift mode; Pumping kite; Solidity factor; Tip-speed ratio; Crosswind kite power system; Pumping kite; Tip-speed ratio; Lift mode; Aerodynamic coefficient; Airborne wind energy; Solidity factor; Induction factor
• ISSN: 2352-4847; 2352-4847
• DOI: 10.1016/j.egyr.2022.01.109

High-altitude wind power generation mainly collects wind energy at a certain altitude through tethered aircraft. This article discusses the current status of the research on the power system of the cut wind flying kite, and derives the relationship between the drag coefficient and the solidity factor and aerodynamic coefficient χ of the towed kite in the lift mode. Furthermore, the formulas of lift-type working power coefficient and waste power coefficient are discussed. It is pointed out that the power coefficient CPLk will increase with the increase of the aerodynamic coefficient χ and increase with the decrease of the Solidity factor σ, but the drag coefficient will be a≤1/2. The product of the Solidity factor and the aerodynamic coefficient σχ≤4. Analyzed the characteristics of each system parameter, and then used the concepts of effective power and waste power to derive the efficiency formula of the system, and pointed out that the range of reasonable work efficiency is 0.33∼0.5.