Standard Technical Features of BTG System for Supercritical 660 ...

Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Units13.2.3 Design parameters for condenser and associated systemsi) Condenser Design Parametersa) Number of pressure stages Single pressure/ dualpressureb) Number of passes Single pass/ double passc) Number of shells One/ twod) Design cold water temp 33 0 C 5e) Water velocity in the tubes 1.6 to 2.2 m/sf) Maximum design condenser pressure 77 mm Hg (abs) 6g) Max. tube length between tube plates 15 m (indicative)h) Temperature rise of circulating water 9 to 11 deg C 7across the condenseri) Cleanliness factor 0.9j) Fouling factors As per HEIk) Tube plug margin 5% under designconditionii)l) Max. CW side pressure drop acrosscondenser and associated piping systemat design flow with tube cleaning systemin operation5 mwc for singlepressure condenser &9 mwc for dual pressurecondenserm) Maximum/minimum temperature of 36 deg C 8 /15 deg Ccirculating watern) Condenser arrangement Perpendicular to TGaxiso) Water box design pressure 5.0 kg/cm 2 (g) and 0.1kg/cm 2 (abs)p) Water box test pressure 1.3 times the designpressure (minimum)q) Water box design temperature 60 0 Cr) Shell side design pressure Full vacuum and 1.08kg/cm 2 (g)s) Shell side design temperature 120 0 CDesign Parameters for Isolating Butterfly Valves, Expansion Jointsand CW Piping etc.a) Design pressure 5 kg/ cm 2 (g) and 0.1kg/cm 2 (abs)b) Design temperature 60 0 Cc) Test pressure 1.3 times the designpressure (minimum)5 30 00 C for sea water based once- through type CW system6 60mm Hg (abs) for sea water based once- through type CW system7 Not to exceed 7 0 C for sea water based once- through type CW system8 33 0 C for sea water based once- through type CW system101