Abstract

Nowadays, renewable energy sources have become essential for all countries. However, each state’s ability to use those sources depends on specific determinants, such as meteorological geographical variables. In addition, the low cost of energy produced is one of the criteria in choosing the most appropriate method for the renewable energy source. Since the most famous of these sources are solar and wind energy, most countries try to use both on a large and small scale. While the state of Hawai'i is exposed to an excellent mean wind speed throughout the year, this aerial potential must be widely utilized using small wind power sources over buildings. Therefore, this article will explore the use of vertical-axis wind turbines on the roof tops of buildings to generate clean energy. The calculations output was compared with that of solar sources regarding energy production and cost. The results show that wind turbines, on a small scale, are 20 percent more effective than solar panels in energy generated annually. This finding suggests that wind turbines, on a small scale, in Hawaiian Islands increase the production of clean energy for residential buildings and help architects add other environmental treatments on roof tops instead of solar panels.