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INTRODUCTION
Figure 1.3: Vertical axis showing percentage of the population with access to electricity (electri-
fication ratio) and horizontal axis indicating the number of people without access to electricity [2]
Approximately 85% of these people live in rural areas, which will be the key target of the
EWB wind turbines. It is expected that the units primarily will be used for charging batter-
ies that will power e.g. refrigeration, lighting and mobile phones. In Nigeria, for example,
the current per capita energy consumption is below 200 kWh annually [3]. Given 8760
hours per year and 50% availability a 100 W wind turbine would provide the required
power for 2 people. While this analysis is simplistic, it shows the impact that small scale
electrification projects can have in Africa [4].
The initial objective of the present project is to establish which wind turbine concept is
most suitable when taking into account the requirements specified by EWB-DK. With this
accomplished, the objective is to develop an overall wind turbine design with a power
output of 1500 W at a wind speed of 12 m/s. The detailed requirements for the listed ob-
jectives are elaborated in the following chapter, containing the problem statement of the
project.
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