Wind Speed Measurements and Comparisons in Cakung Jakarta

Abstract

Standard procedure to find the highest wind speed in an office area is defined, exercised and verified. Different tools are used in the procedure to find and measure wind speed at different locations starting from already available wind speed data at the Global Wind Atlas, then verified with a handheld anemometer and with a weather station. Wind data collections using handheld anemometer and weather station were done at 2-meter elevation and compared with the lowest elevation data available in the Global Wind Atlas at 10-meter height. This procedure is applied in West Cakung Office area which is in an industrial complex in East of Jakarta. This project can contribute to other companies in the industrial complex to develop wind energy projects. We found that the wind speed average from the Global Wind Atlas at 10-meter elevation, 1.43 m/s, higher than any measurements done at 2-meter elevation in several spots using handheld anemometer and weather station, 0.5 - 1.4 m/s. The measurement results using handheld anemometer is consistent with using weather station. The highest wind speed at 2-meter elevation occurs at a site located between two large buildings which create tunneling effect and amplify the wind speed. This site has higher wind speed even compared to the site 2-meter on the roof of buildings due to obstacles from walls and other structures on the roof. Wind speed measurements using weather station was also done at higher elevation with the support of air balloon. The height of the air balloon is around 10 – 15 meter above the ground. We found that the wind speed average at this level is 1.6 m/s, which is slightly higher than the data from the Global Wind Atlas due to slightly higher elevation and maybe due to air acceleration around the balloon which has 1.5-meter diameter. Although the wind speed average is consistent for all three sources: Global Wind Atlas, handheld anemometer, weather station, but the daily wind speed hourly index is not consistent. Wind speed data from the Global Wind Atlas shows that the peak of wind speed occurs in the morning time, while the data from handheld anemometer and weather station shows that the peak of wind speed occurs in the afternoon time. More investigations will be done to explain this inconsistency in the future work.