Air-cooled　power　plants　have　been　extensively　applied　in　the　dry　areas　with　the　ACSC　(air-cooled　steam　condensers)　to　reject　the　waste　heat　from　the　turbine　exhaust.　However,　the　performance　of　the　relevant　condensers　is　sensitive　to　the　meteorological　conditions　due　to　its　exposing　in　the　ambient.　As　a　result,　it　is　too　difficult　for　the　air-cooled　power　plants　to　operate　at　the　design　efficient　points　under　the　severe　wind　conditions　such　as　high　ambient　temperature　and　strong　wind,　and　it　has　great　significance　to　optimize　the　operation　mode　for　a　better　flow　and　heat　transfer　characteristics.　In　the　paper,　a　2　x　600　MW　power　plant　is　modeled　to　investigate　the　performance　of　the　air-cooled　power　plants.　The　blade　installation　angle　of　the　axial　fans　is　modified　off　the　design　case　to　obtain　a　new　power　plant　performance,　which　is　compared　to　the　design　value　at　prevailing　wind　angle　and　five　different　designated　wind　speeds.　It　is　found　that　the　alternation　of　the　blade　installation　angle　for　the　windward　fans　changes　the　performance　of　the　fan　array　as　well　as　the　heat　transfer　characteristics　for　the　finned-tube　exchangers　in　the　air-cooled　steam　condenser.　The　net　power　of　the　power　plant　and　the　thermal　efficiency　of　the　closed　Rankine　cycle　differ　from　the　alternation　of　the　blade　angle.　(C)　2013　Elsevier　Ltd.　All　rights　reserved.