دانلود رایگان مقاله مطالعه تجربی تأثیر جریان سرما در یک برج خنک کننده خشک طبیعی پیش نویس

The  heat  rejection  rate  of  natural  draft  dry  cooling  tower,  as  well  as  the operating  performance  of apower  plant,  can  be  affected  by  numerous  ambient  factors.  The cold  inflow  is  an  unfavourableair  turbulence  at  the  top  of  the  cooling  tower  and  has a significantnegative effect on the performance of natural draft cooling towers. In the present research, results  are  given  for a  20  m  high natural  draft  dry  cooling  towerexperimental system tested at different ambient conditions. Several events of cold air incursioninto the top of  the  cooling  tower are  identified and  the  detailed  experimental  data arepresented.  The experimental data show that this effect could seriously impair the thermal performance of the cooling tower. The water outlet temperature of the coolingtower hasincreased by as much asto  3°C in  these  tests because  of  the  cold infloweffect.  The  mechanism  and  the  solution arediscussed  based  on  the  experimental  data.  The  findings  in  this  paper  can  lay  an  important foundation for future small natural draft cooling towerdesign and operation.