Indonesia has an abundant renewable energy source. One of them is wind energy
resources. Unfortunately, Indonesia's wind energy resource is not fully utilized,
especially for application in high-rise buildings. The paper investigates the potential of
energy production from the horizontal-axis wind turbine (HAWT) and the vertical-axis
wind turbine (VAWT) on the rooftop of a university building in Indonesia. The wind
speed data were measured on the rooftop of the building for seven months. The data
was analyzed using Weibull distribution. Based on the probability density function of
the Weibull distribution, the potential energy production was calculated using the
power curves from the manufacturer. Comparing energy production between HAWTs
and VAWTs has shown that VAWTs can produce more energy than HAWTs. Using six
turbines, VAWTs can produce 48,476 kWh. On the other hand, with four turbines,
HAWTs can produce 41,729 kWh. The reason is that VAWT requires shorter distance
requirements for inter-turbine and between rows. Therefore, VAWT can use more
turbines than HAWT in the limited area. In conclusion, VAWT for high-rise buildings is
more preferred because VAWT can generate more energy. Further study should
investigate the optimal configuration with varying the wind direction and quantifying
the wake effect on power output.