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Aerodynamic design and economical evaluation of site specific horizontal axis wind turbine (HAWT)

机译：特定地点水平轴风力涡轮机（HAWT）的空气动力学设计和经济性评估

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This paper presents the aerodynamic design and economical evaluation of a 200 kW site specific wind turbine for the province of Semnan in Iran. By designing site specific wind turbines, the cost of energy which is calculated out of the annual energy production and also the cost of manufacturing the rotor are minimized. The aerodynamic design is based on the well-known blade element momentum theory (BEM) which is integrated with annual wind distribution of the designated wind site to determine the net annual electricity yield for two designed rotors. In the first rotor, a linear fit approximation is used for the chord length and twist angle distributions for ease of manufacturing and to overcome technological barriers in Iran. In the second rotor, the optimum original nonlinear distribution of the blade is assumed. The RIS?-A-24 aerofoil is used and optimized for the design tip speed ratio of λ=8.93 for both rotors. Pitch angle control is also adopted here. A comparison is made between the aerodynamic performance and decrease of manufacturing costs for both rotors. The economic feasibility indicates that based on current electricity costs of 12 cent per kWh in Iran for renewable energies, a profit of 7.2 cent and 8.1 cent per each kWh generated power is achievable respectively by the linear and nonlinear rotor designs. Therefore, the scenario of reducing initial costs is not recommended unless technological shortcoming in manufacturing rotor cannot be avoided.
机译：本文介绍了伊朗Semnan省一台200 kW特定地点风力涡轮机的空气动力学设计和经济性评估。通过设计特定地点的风力涡轮机，可以将年发电量中计算出的能源成本以及转子的制造成本降至最低。空气动力学设计基于众所周知的叶片元素动量理论（BEM），该理论与指定风场的年风分布相结合，以确定两个设计转子的年净发电量。在第一个转子中，对弦长和扭转角分布使用线性拟合近似，以简化制造并克服伊朗的技术障碍。在第二转子中，假定叶片的最佳原始非线性分布。使用RIS？-A-24机翼并针对两个转子的设计叶尖速比λ= 8.93进行了优化。在此也采用俯仰角控制。在两个转子的空气动力性能和制造成本降低之间进行了比较。经济可行性表明，根据伊朗目前可再生能源的每千瓦时12美分的电力成本，线性和非线性转子设计分别可实现每千瓦时产生的7.2美分和8.1美分的利润。因此，除非不能避免转子制造中的技术缺陷，否则不建议降低初始成本。

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