Design Of Small Wind Turbine To Operate Grain Mill

                             This work represent design of 37.037kw a horizontal- axis wind turbine with three blades to operate grain mill with power of 25KW in Sennar State. The problem of study that sennar suffer about unstable of power generation. The main components and parameters of design were obtained from Sennar state  metrological  authority and Sudan wind prospecting map from the year 2008 to 2017. These parameters  included, average wind speed was5.6m/s at 50m high, wind direction is north, location of turbine in east bank of Blue Nile north Sennar

Dam. Design calculation showed , swept area of blade (A)was 860mm², rotor  radius(R)was523.34mm tip speed ratio(λ)was 4.189,angularspeed(ω)was0.0451rad/s, power

coefficient (Cp)was0.4,power production(P)was37.037KW,annualenergyproduction (AEP)was54074.02KWh/year. Matlab software with Excel sheet  used to obtain all characteristic curves between, pitch angle( β),power coefficient (cp), tip speed ratio( λ),rotor output power(P), relative power(Pr) vs wind speed. Inverter used to convert Ac current to Dc current, storage power by four batteries of 12volt-200amper for each .The study Recommended this work con be extended to include, design the gearbox, add storage unit, design the tower, consider of economic befits and the cost of design and material.