Centimetre Scale Micro Wind Turbine Modelling Correction Using Wind Tunnel Experiments

摘要

In this work, wind tunnel testing is conducted on three different centimetre-scale micro wind turbine (CSMWTs) sets with different diameter scales and blade geometry. Each set consists of two micro turbines of the same blade number and shape but with different diameter. The aim is to obtain a direct relation between the rpm, rotor diameter and output power at different rated speeds. These opposing factors should be optimized when designing such (CSMWTs) with a maximum power-output. In doing so, one can determine the dependency of the harvested power on the rotor diameter along with the electric load resistance. Based on the experimental results conjuncted with a simple output power equation proposed can results in a suitable correction in modelling such micro wind turbines (MWTs). Measurements are performed over two values of air speeds as maximum and minimum boundary and a board range of electric resistive loads. The results shows an optimal combination between the rotor diameter and the rotational speed of the turbines.