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Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
Hrsg  & turbine as run energy efficiency assessment
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Hrsg & turbine as run energy efficiency assessment

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  • 1. AS RUN ENERGY EFFICIENCY ASSESSMENT OF HEAT RECOVERY STEAM GENERATORS &TURBINES OBJECTIVE: • TO ASSESS THE AS RUN PERFORMANCE OF HEAT RECOVERY STEAM GENERATORS TOWARDS MAINT.PLG. AND UPKEEP AS RUN MEASUREMENTS INVOLVED:• G.T. AND S.T . OUTPUT MW• Flue Gas TEMP AT HPSH INLET& OUTLET• Flue Gas TEMP AT HP ECONOMISER INLET& OUTLET• Flue Gas TEMP AT LPSH INLET& OUTLET• Flue Gas TEMP AT LP ECONOMISER INLET& OUTLET• Flue Gas TEMP AT LP EVAPORATOR INLET & OUTLET• Flue Gas TEMP AT COND.PREHEATER INLET& OUTLET• FEED WATER FLOW AND TEMP.• PRESSURE & SUPER HEAT AT LP SUPER
  • 2. HEAT RECOVERY STEAM GENERATORS (Illustrative as run values) S.No. ITEM REFERENCE VALUE. G.T.OUTPUT MW 89.62. S.T.OUTPUT MW 104.71. H.P.STEAM FLOW TPH 161.00. L.P. STEAM FLOW TPH 37.62. H.P. STEAM PRESSURE BAR 64.75. L.P. STEAM PRESSURE BAR 5.11. H.P.SUPER HEATER TEMP.oC 517.00. H.P.SUPER HEATER STEAM 827.00 ENTHALPY kCal/kg. H.P. SATURATED STEAM 663.70 ENTHALPY kCal/kg0. Flue Gas TEMP. HP SUPER HTR. 527.00 INLET oC1. Flue Gas TEMP TO HPSH OUT 435/4512. HEAT PICK-UP IN HPSH 26.291 (MkCal/hr) Item 3*103(Item 8 - Item 9)
  • 3. HRSG PERFORMANCE FEATURES (Illustrative as run values) S.No. ITEM REFERENCE VALUE3. Flue Gas TEMP. AT HP EVAP. 435/451 INLET oC4. Flue Gas TEMP. AT HP EVAP. 290/291 OUTLET oC5. ECONOMISER-2 OUT WATER 280.90 ENTHALPY6. HEAT PICK-UP IN H.P. 61.63 EVAPORATOR(MkCal/hr) Item 3*103(Item 9 - Item 15)7. Flue Gas TEMP @ HP ECON.-2 290/291 INLET oC8. FG TEMP @ HP ECON.-2 225.00 OUTLET oC9. WATER TEMP & ENTHALPY 106.90 @ HP ECON.1 INLET0. HEAT PICK-UP IN H.P. 28.01 ECONOMISERS-1 &2 (MkCal/hr) Item 3*103(Item 15 - Item 19)
  • 4. HRSG PERFORMANCE FEATURES ((Illustrative as run values))S.No. ITEM REFERENCE VALUE21. FG TEMP. AT LP SUPER HTR. 225.00 INLET O C22. FG TEMP. AT LP SUPER HTR. 224.00 OUTLET o C23. LP SUPER HTR. TEMP.O C 197.2024. ENTHALPY OF LP SUPER 680.00 HEATER STEAM (kCal/kg)25. ENTHALPY OF LP SATURATED 650.50 HEATER STEAM (kCal/kg)26. HEAT PICKUP IN LP SUPER 0.889 HEATER ( MkCal/hr) item-4 * 103 (Item-24-Item-25)
  • 5. HRSG PERFORMANCE FEATURES (Illustrative as run values)S.No. ITEM REFERENCE VALUE27. Fl.Gas TEMP. AT LP EVAP.224.00 INLET oC28. Fl.Gas TEMP. AT LP EVAP. 169.00 OUTLET oC29. F.WATER ENTHALPY AT 160.70 EVAP. INLET kCal/kg30. H. PICK-UP IN L.P. 18.727 EVAP (Mkcal/hr) Item 4*103(Item 25 - Item 29)
  • 6. HRSG PERFORMANCE FEATURES (Illustrative as run values)S.No. ITEM REFERENCE VALUE 31. FG TEMP. AT LP/HP1 169/169 ECONOMISER INLET oC 32. FG TEMP. AT LP/HP1 120/133 ECONOMISER OUTLET oC 33. FG TEMP. AT LP ECONOMISER 104.60 INLET oC 34. HEAT PICK-UP IN L.P. 0.889 ECONOMISER-1 (Mill.kcal/hr) (Item 4*103(Item 29 - Item 33)
  • 7. HRSG PERFORMANCE FEATURES (Illustrative as run values) S.No. ITEM REFERENCE VALUE35. FG TEMP. AT CONDENSATE 120/133 PRE HEATER INLET oC36. FG TEMP. AT CONDENSATE 105.00 PRE HEATER OUTLET oC37. FLOW THROUGH CONDENSATE 190.62 PRE HEATER TPH (Item3-Item4)38. FW TEMP. AT CONDENSATE 47.00 PRE HEATER INLET OC39. FW TEMP. AT CONDENSATE 94.10 PRE HEATER OUTLET OC40. HEAT PICKUP IN 9.355 CONDENSATE PREHEATER (MkCal/hour)41. TOTAL HEAT PICKUP BY 47.00 HRSG BY WATER & STEAM CIRCUIT (MkCal/hr)
  • 8. BREAK UP OF HEAT PICKUP IN VARIOUS HEAT TRANSFER SURFACES S.No. ITEM REFERENCE VALUE 1. PERCENTAGE BREAKUP OF HEAT PICKUP IN VARIOUS HEAT TRANSFER SURFACES: A. HP SUPER HEATER 17.89 B. HP EVAP. 41.95 C. HP ECON. 1&2 19.06 D. LP SUPER HEATER 8.55 E. LP EVAP. 12.74 F. LP ECON. 1.42 G. CONDENSATE PREHEATER 6.36 2. AMBIENT AIR TEMP. OC 29.00 3. THERMAL EFFY. OF HRSG 84.43 (Item10 - Item36/ (Item10 - Item43)*100 Comparing the above as run values with design data Would serve as an audit and diagnostics tool for Improvements.
  • 9. COMB.CYCLE STEAM TURBINES OBJECTIVE• TO ASSESS THE AS RUN PERFORMANCE AND EFFICIENCY OF STEAM TURBINE SYSTEMS AS RUN MEASUREMENTS INVOLVED:• HRSG HP SUPER HEATED STEAM FLOW TO TURBINE IN MT/HR• HRSG LP SUPER HEATED STEAM FLOW TO TURBINE IN MT/HR• HP STEAM PRESSURE IN BAR• LP STEAM PRESSURE IN BAR• HP SUPER HEATED STEAM TEMPERATURE IN OC• LP SUPERHEATED STEAM TEMPERATURE IN OC• CONDENSER VACUUM (MILLI BAR)• STEAM TURBINE GENERATOR ACTIVE POWER IN MW• DRYNESS FRACTION OF TURBINE EXHAUST : ESTIMATED AS WARRANTED
  • 10. STEAM TURBINE PERFORMANCE ASSESSMENT ILLUSTRATIVE CALCULATION1) Trial Duration : (As run Sample Reference)2) HP Steam Flow : 350.26 TPH3) HP Steam Pressure & : 65.44 bar, 518 oC Temperature4) HP Steam Enthalpy : 3459.50 kJ/KG5) LP Steam Flow in TPH : 79.58 TPH6) LP Steam Pressure & : 4.35 bar, 194.2 oC Temperature7) LP Steam Enthalpy : 2842.40 kJ/KG8) Condenser Vacuum m : 93.50 bar9) Condenser Saturated : 44.5 oC and 186 Temperature & Enthalpy10) Exhaust Steam : 2144.20 Enthalpy for 0.82 Dryness Fraction in kJ/KG
  • 11. 11) Condensate Enthalpy : 186.0 kJ/KG12) Heat Input to Steam : [(Total HP Steam Flow in TPH) Turbine 1000 * kJ/Hr. * (HP Steam Enthalpy – LP Exhaust Enthalpy) + (Total LP Steam Enthalpy - LP Exhaust Enthalpy)] : [(Item 2)(Item 4 - Item 10) + (Item 5) (Item 7 - Item 10)] : (350.26)(3459.5 - 2144.2) + (79.58)(2842.40 - 2144.2) : 460696.97 + 55562.76 : 516259.7313) Theoretical Heat Input : Heat Input to Turbine in KJ/HR to Turbine in MW 1000 * 3600 : Item 12/3600 : 143.4014) Actual Generator : 112.43 Output (MW)15) Turbine + Generator : Generator Output/Turbine Efficiency Input : Item 14 / Item 13 : 78.40%
  • 12. 16) Turbine Heat Input with : [(Total HP Steam Flow in TPH) Reference to * (Heat Steam Enthalpy - condensate Enthalpy Condensate Enthalpy) + (total (1000 * kJ/Hr) LP Steam Flow in TPH) * (LP Steam Enthalpy - Condensate Enthalpy)] : [(Item 2)(Item 4 - Item 11) + (Item 5)(Item 7 - Item 11)] : [(350.26)(3459.5 - 186) + (79.58)(2842.4 - 186)] : 1146576.10 + 211396.30 : 1357972.4017) Feed Water and Steam : (Turbine Heat Input w.r.t. Turbine System Heat condensate Enthalpy in Rate in Kcal/kWh Kcal)/(TG Output in kWh) : (Item 16) / 4.18 * 1/(Item 14) : 2889.56 Kcal/ kWh18) TG Output as % of 100% : (Item 14) * 100 = (112.43) * 100 Base Load Rating 115.69 115.69 : 97.18%

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