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Guiding book of "Wind Turbine Design and Manufacturing Course Design" 1. Course design purpose and requirements 1.1 The purpose of the course design The design of this course is carried out after students complete the professional course of "Wind Turbine Design and Manufacturing", which is the deepening and practice of professional theoretical knowledge. Through the design of this course, students can initially master the general methods and ideas of wind turbine design, and cultivate students' ability to consult literature and operate related software, as well as the study style of integrating theory with practice. 1.2 The Requirements of the course design Taking the large horizontal axis wind turbine as the research object, master its overall design method (general parameters, overall layout, etc.), as well as the design methods of several main subsystems and components of the wind turbine; learn the load calculation method of the main bearing components of the wind turbine; determine the power of the main components of the wind turbine, and be familiar with the use of related software. 2. Compilation of design steps and design instructions According to the design content and specific requirements given in the task book of course design, to carry out your design according to the following steps of data access, overall design of wind turbines, detailed design of subsystems and components, and write the design basis, results and conclusions of each step into the design specification, and write the calculation basis, steps and results into the calculation book. The main contents and precautions of the design are indicated as follows: 2.1 Original data and parameters In a wind farm, the customer wants to install a horizontal axis, upwind direction, 3-blade standard wind turbine with rated power Pe between 1.0 MW and 5.0 MW, and the grade is set according to the Vref and Iref values in the standard IEC 61400-1:2005. It is assumed that the 10-minute average wind speed at a height of 80 meters at the fan installation site is 15 m/s, and the wind profile is a power-law profile wind farm. The average temperature in July, the hottest month in the location, is 30 °C, and the average temperature in January, the coldest month, is -5 °C. The designed wind turbine should ensure that the efficiency of the transmission system is not lower than n₁ = 0.92, and the efficiency of the generator system is not lower than n2 = 0.95. The air density is taken as 1.225kg/m³. The original airfoil of the wind turbine blade is selected or combined according to factors such as aerodynamics, structural design requirements and power control methods. The data of the selected original airfoil can be obtained from the network or the corresponding airfoil database, such as profili software (http://www.profili2.com/download/profiliv2.exe) etc.