1 1 ▁report ▁from ▁a ▁coal ition ▁of ▁research ers ▁from ▁univers ities , ▁industry , ▁and ▁government , ▁supported ▁by ▁the ▁At kin son ▁Center ▁for ▁a ▁S ust ain able ▁Future . ▁ ▁The ▁major ▁parts ▁of ▁a ▁modern ▁tur bine ▁may ▁cost ▁( percent age ▁of ▁total ): ▁tower ▁ 2 2 %, ▁bl ades ▁ 1 8 %, ▁g ear box ▁ 1 4 %, ▁generator ▁ 8 %. ▁ ▁Design ▁specification ▁ ▁The ▁design ▁specification ▁for ▁a ▁wind - t urb ine ▁will ▁contain ▁a ▁power ▁curve ▁and ▁guaranteed ▁avail ability . ▁With ▁the ▁data ▁from ▁the ▁wind ▁resource ▁assess ment ▁it ▁is ▁possible ▁to ▁calculate ▁commercial ▁vi ability . ▁The ▁typical ▁operating ▁temperature ▁range ▁is ▁. ▁In ▁areas ▁with ▁extreme ▁climate ▁( like ▁Inner ▁Mong olia ▁or ▁Raj as than ) ▁specific ▁cold ▁and ▁hot ▁weather ▁versions ▁are ▁required . ▁ ▁Wind ▁tur b ines ▁can ▁be ▁designed ▁and ▁valid ated ▁according ▁to ▁IE C ▁ 6 1 4 0 0 ▁standards . ▁ ▁R DS - PP ▁( Reference ▁Design ation ▁System ▁for ▁Power ▁Pl ants ) ▁is ▁a ▁standard ized ▁system ▁used ▁world wide ▁to ▁create ▁struct ured ▁hierarchy ▁of ▁wind ▁tur bine ▁components . ▁This ▁facil it ates ▁tur bine ▁maintenance ▁and ▁operation ▁cost , ▁and ▁is ▁used ▁during ▁all ▁stages ▁of ▁a ▁tur bine ▁creation . ▁ ▁Low ▁temperature ▁ ▁Util ity - scale ▁wind ▁tur bine ▁gener ators ▁have ▁minimum ▁temperature ▁operating ▁limits ▁which ▁apply ▁in ▁areas ▁that ▁experience ▁temper atures ▁below