how to design a condenser for a power plant .Full description
Full description
Condenser Design Calculation (According to HEI stan Input Data: 1 2 3 4 5 6 7 8 9 10 11 13 14 15
Mass flow rate Steam inlet pressure Steam inlet temperature Given enthalpy Saturated enthalpy of the liquid Saturated enthalpy of the vapour Cooling water velocity Dryness fraction Cooling water inlet temperature Cooling water outlet temperature Temperature difference Allowable pressure drop on tube side Cleanliness factor Tube MOC
Heat load on the condenser Actual heat load on the condenser Drains connection heat load Total heat load Cooling water flow rate Density of cooling water at mean temp. Total cooling water requirement QW Tube OD Tube thickness BWG Tube ID Cross sectional area of the tube
LMTD calculation Temperature difference ( TR ) Initial temperature difference ( ITD ) Terminal temperature difference ( TTD )
= = =
10 13 2.836
Calculation: Heat load calculation ( Q )
LMTD = TR / ln (ITD/TTD)
=
6.62
Corrected heat transfer co-efficient(U) calculation Uncorrected heat transfer co-efficient(U1)
Tube material factor(Fm) Cleanliness factor(Fc) Water correction factor(Fw) Corrected heat tranfer co-efficient(U) ( U = U1 X Fm X Fc X Fw )
= = = = =
706.4 3448.6448 0.82 0.9 1.079
=
2746.16
=
41453.93
=
41570.30
=
16.6624
= )
7474.9
Requirement of surface area ( A ) Total area required for heat transfer ( Q = U X A X LMTD ) Total number of tubes required ( QW = N X A X V ) Length of the tubes required ( A = Pi X d X N X L) Diameter of the condenser required D=Tube OD X sqrt(no of tubes / 0.27
Pressure drop across the condenser P=
Lt x (Rt x R2 x R1) + (Re1+Re2+Re3)
HEI for Surface Condenser- 9th edition with Addendum
