河西走廊风能资源立体分布研究

THREE DIMENSIONAL DISTRIBUTION CHARACTERISTICS OF WIND ENERGY OVER HEXI CORRIDOR

利用河西走廊地区1970～2004年气象站风速气候资料和2004年9月～2005年8月周年风塔精细资料，对风速采取气候订正和即时风速订正，给出接近区域的自然（实际）风速，依次研究了该区域近地面70m层内风能分布变化。结果表明：河西走廊风能存在明显日变化和月变化，6～8时风能相对较小，16～19时较大，高层风能极值时间滞后于低层；一年中2～6月风能较大，秋季最小。空间分布大致由北向南递减，存在两个风能大值中心；10～70m层内风能随高度以线形关系增大，10m高度风能大多地方在150W／m^2以上，70m高度风能基本在300W／m^2以上。河西走廊区域70m层内总风能年储量在1．5×10^15kWa／m^2以上，风能储量相当丰富。

By investigating wind climate of 19 stations in Hexi corridor during 1970 - 2004, and 7 wind-towers in Gobi from Sep. 2004 to Aug. 2005, reviseing wind speed by the correletion between weather station and the tower, results showed that the change of wind energy had obviously daily and monthly difference in Hexi corridor. In a day, the time maximum or minimum of wind energy value occurred in high layer lagged than in the low. The smallest wind energy was in 6 - 8 o＇clock, the strongest one was during 16 - 19 o＇clock in a day. In a year, the maximum one was between Feb. and June, the minimum one was in autumn. The wind energy increased with the liner rule from 10 meter to 70m height level, parabolic orbit under 8 m high near ground. The Wind energy distribution decreased from the north to south part in Hexi corridor, of which two large energy centers were located the west and east edge. The mean wind energy was over 150W/m^2 at 10m high near ground, and over 300W/m^2 at 70m high. Hexi Corridor owned very plenty wind energy resource, over 1.5 ×10^15kWa/m^2 in whole 70m layer near ground annual year.