Wind resource assessments are carried out for two sites in Tuvalu: Funafuti and Nukufetau. The wind speeds at 34 and 20 m above ground level were recorded for approximately 12 months and analyzed. The averages of each site are computed as the overall, daily, monthly, annual, and seasonal averages. The overall average wind speeds for Funafuti and Nukufetau at 34 m above ground level were estimated to be 6.19 and 5.36 m/s, respectively. The turbulence intensities at the two sites were also analyzed. The turbulence intensity is also computed for windy and low-wind days. Wind shear analysis was carried out and correlated with temperature variation. Ten different methods: median and quartiles method, the empirical method of Lysen, the empirical method of Justus, the moments method, the least squares method, the maximum likelihood method, the modified maximum likelihood method, the energy pattern factor method, method of multi-objective moments, and the wind atlas analysis and application program method were used to find the Weibull parameters. From these methods, the best method is used to determine the wind power density for the site. The wind power density for Funafuti is 228.18 W/m2 and for Nukufetau is 145.1 W/m2. The site maps were digitized and with the WAsP software, five potential locations were selected for each site from the wind resource map. The annual energy production for the sites was computed using wind atlas analysis and application program to be 2921.34 and 1848.49 MWh. The payback periods of installing the turbines for each site are calculated by performing an economic analysis, which showed payback periods of between 3.13 and 4.21 years for Funafuti and between 4.83 to 6.72 years for Nukufetau.

中文翻译：

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通过准确估计威布尔参数评估图瓦卢的风能潜力

图瓦卢的两个地点进行了风资源评估：富纳富提和努库费套。记录了大约 12 个月的距离地面 34 米和 20 米的风速并进行了分析。每个站点的平均值计算为整体、每日、每月、每年和季节性的平均值。Funafuti 和 Nukufetau 在地平面以上 34 m 处的总体平均风速估计分别为 6.19 和 5.36 m/s。还分析了两个地点的湍流强度。湍流强度也计算有风和低风的日子。进行了风切变分析并与温度变化相关联。十种不同的方法：中位数和四分位数方法、Lysen 经验方法、Justus 经验方法、矩量法、最小二乘法、最大似然法、采用修正最大似然法、能量模式因子法、多目标矩法、风图分析及应用程序法求威布尔参数。从这些方法中，最好的方法用于确定站点的风功率密度。Funafuti 的风功率密度为 228.18 W/m2，Nukufetau 的风功率密度为 145.1 W/m2。站点地图被数字化，并且使用 WAsP 软件，从风力资源地图中为每个站点选择了五个可能的位置。使用风图谱分析和应用程序计算出这些站点的年发电量分别为 2921.34 和 1848.49 MWh。每个站点安装涡轮机的投资回收期是通过经济分析计算得出的，结果显示投资回收期在 3.13 到 4 之间。