Field test and numerical simulation on the coastal wind-powered light system

This paper introduces field test and numerical simulation on coastal wind-powered light and battery system, as one typical example of on-site wind power utilization. Field experiment was conducted at the Kurihama coast facing to the entrance of the Tokyo Bay. The experimental system with 12W powered light was set to operate daily 6 hours after sunset. Wind velocity and direction at the three points, light on-off signal, electric power generation rate, and battery voltage corresponding to the stored electric power were recorded continuously for eight months without interrupt. Three dimensional wind characteristics were numerically simulated to estimate topographical wind distribution. Based on the observation and numerical simulation, optimal design of coastal wind-powered lights and battery system was shown with consideration of topographical and time variation of wind characteristics