technical NOTES

(Project Pridr) #1
S.No Performance Parameters UOM Symbol

9 Pressure of air at fan outlet
mm Pfo

10 Pressure drop across the fans
mm oPfan = Pfo - Pfi (2)

11 Fan speed - RPM Nrpm

12 Condenser duty

Kcal/hr Q
Wcond*(Hvap - Hliq)
13 Ambient air temperature

Tamb

14 Effective modified heat transfer
coefficient

Umod

14 Log Mean temperature difference

oC LMTD

(T


ao

– T


ai

) /


logn((T
s

- T


ai

) /


(T


s

– T


ao

))


Advantages Of Air-Cooled Steam Condenser



  • Elimination of additional water usage from the condensing power cycle

  • Flexibility in power plant site selection

  • Decreased time required for plant permitting


Why ‘A’ Frame Condenser


Apex angle approximately 60o



  • Higher heat transfer coefficient

  • Integral condensation more likely

  • Cross-flow design

  • Less floor area

  • Less distribution duct length

  • Easy Drainage of condensate


Why Partition Wall Between Two Modules


To avoid evacuating air when a fan is “off”
Doors are provided in the partition wall to allow free access into air plenum even while
fans are in operation

Free download pdf