Wind power is identified as one of the potential Renewable Energy resource/technology for electricity generation in the World. As recommended wind turbines may be installed individually. These are typically smaller than those installed in wind farms, and may be installed on the rooftops of building, although there are very few examples of this in the world. According to American Wind Energy Association (AWEA), annual average wind speeds of 3 to 4 m/s may be adequate for wind energy applications.Having analysed the annual mean wind speed data recorded in various urban metrological stations in year 2001 (see Appendix A), it was found that of all stations Located in the vicinity of the Victoria Harbour, are greater than 3 m/s.
Also the prevailing wind directions recorded in these stations suggest that the winds are channelled by the buildings along the shorelines. The focus of this project is to identify the feasibility and develop of small-scale wind power system in Hong Kong, which will be installed on the rooftop within urban area.The pre-selected building of this study is located at Hong Kong Government Logistic Centre, at Chai Wan, Hong Kong. Successful planning of wind power system installed on the rooftop will require that the proposed development, in this case, the Hong Kong Government Logistic Centre (see the location map in Appendix B) must address the concerns of wind resource, architectural, structural, safety and environmental issues. One anemometry system will be used on a 10m tower and will include two anemometers and two wind vanes, with one set at 10m and one set at 5m.The data logger for the site will be programmed to record the wind speed and wind direction at two heights with a sampling rate of 3 seconds and an averaging period of 10 minutes. Statistics of mean wind speed, wind speed standard deviation, mean direction and maximum 3-second gust will be stored for every averaging period.
The logger will then send the collected data through a wireless GSM modem to our office twice for analysis on one date period. The logger has enough memory for least six weeks of wind data.The collected data were tabulated on Appendix C, and the graph of the wind speed profile is plotted on the following. From the table showed as above, the mean and median of the wind speed at March 04′ is so close to 2. 9 m/s and 2.
7 m/s, and the most frequent occurred wind speed is 0. 4 m/s and also same as the minimum wind speed. The maximum wind speed is 9. 6 m/s. The standard deviation of wind speed collected as March 04′ is 1. 756 m/s. 5 Survey Limitations There are significant limitations to our analysis that should be acknowledged in here:Sample Size: Perhaps most importantly, wind energy are still relatively new in Hong Kong.
As a result, the availability of existing data about wind energy for Hong Kong is rare. Moreover, the time for our study is not enough to collect more data for analysis and affect the sample size, and we have only 4496 data for a month, ideally we expected we can have a data included whole year for analysis. However, we believe that the data collected at March is adequate to reflect the wind profile for a year.For we have checked the past record from HK Observatory, the wind speed in March is the lowest one compared with other months. Time constraint. Wrong time stamp problem: We have found that the data retriever software has the wrong time stamp issue, when we trial it on the February, it didn’t recognized 2004′ is a leap year and it jumped to the 1st of March when the real time is 29 Feb 04.
Fortunately, we have re-fixed it by our IT department, and then we can utilize the data collected at March 04′ only.