家庭家用級(jí)汽油發(fā)電機(jī)30-40KW靜音型 |
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50kw汽油發(fā)電機(jī)超靜音
家庭家用級(jí)汽油發(fā)電機(jī)30-40KW靜音型
薩登發(fā)電機(jī)優(yōu)勢(shì): 家庭家用級(jí)汽油發(fā)電機(jī)30-40KW靜音型
![]() 建立了三維瑞流風(fēng)場(chǎng)模型,詳細(xì)推導(dǎo)了改進(jìn)的譜,歸納了 影響三維瑞流風(fēng)場(chǎng)的塔影效應(yīng)和尾流效應(yīng)的計(jì)算模型。介紹了風(fēng)力發(fā)電機(jī)組的葉 素動(dòng)量理論,總結(jié)了計(jì)算軸向誘導(dǎo)因子和軸向誘導(dǎo)因子的計(jì)算程序,并分析了葉 素動(dòng)量理論的不足。為了考慮風(fēng)輪空氣動(dòng)力的三維效應(yīng),引入了葉尖輪轂損失修 正、推力系數(shù)修正、攻角修正和風(fēng)切變速度修正?偨Y(jié)了現(xiàn)有的幾種結(jié)構(gòu)建模方 法,對(duì)比了三種結(jié)構(gòu)建模方法的優(yōu)缺點(diǎn)。
家庭家用級(jí)汽油發(fā)電機(jī)30-40KW靜音型
,2MW wind turbine with a doubly-fed induction generator is studied by life cycle assessment ( LCA ) method. A quantitative evaluation on carbon footprint and cumulative energy demand ( CED ) in the whole life cycle of the wind turbine is conducted. The result showed that carbon footprint of wind turbine on the manufacturing process , transportation process , running process and end of life process are 1701 t , 61 t , 255 t and - 325 t , respectively , and the CED are 10413 GJ , 701 GJ , 1561. 95 GJ and - 1081 GJ , respectively. The manufacturing process is the‘hot spot’for carbon footprint and CED , contributing 101% and 90% in the whole life cycle. The end of life process is a key process and contributes - 19% for carbon footprint and - 10% for CED , which is largely due to the recovery of materials. The carbon footprint and CED of 1k Wh electricity generating by wind power are 20. 7 g and 0. 14 MJ , respectively. Based on the sensitivity analysis , mass of the wind turbine and recovery rate of metals in the end of life process are identified as the key driving forces for carbon footprint and cumulative energy demand of wind turbine.
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