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Improving Efficiency Reliability of STEAM TURBINE Through R M BY: AMITABH SRIVASTAVA SR.DGM, BHEL HARDWAR

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Improving Efficiency Reliability of STEAM TURBINE Through R M BY: AMITABH SRIVASTAVA SR.DGM, BHEL HARDWAR

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    1. Improving Efficiency & Reliability of STEAM TURBINE Through R & M BY: AMITABH SRIVASTAVA SR.DGM, BHEL HARDWAR

    3. RESULTING TO ENHANCED EMPHASIS ON => REDUCTION IN GENERATION COST ? HIGH EFFICIENCY OF TG CYCLE ? LOWER EQUIPMENT COST ? SHORTER GESTATION PERIOD ? REDUCED MAINTENANCE TIME => INCREASED RELIABILITY => MINIMIZING ENVIRONMENTAL HAZARDS

    5. IMPROVEMENT IN STEAM TURBINE PERFORMANCE

    7. CONSIDERATIONS IN RETROFITTING & UPGRADATION OF OLDER SETS

    8. RETROFITTING & UPGRADATION OF OLDER SETS

    9. RETROFITTING & UPGRADATION OF OLDER SETS MAJOR MODIFICATIONS IN GUIDE & MOVING BLADE (LATEST STATE OF ART PROFILE) STEAM FLOWPATH ROTORS & INNER CASINGS OF TURBINE SHAFT SEALINGS [ADVANTAGE IN HEATRATE / OUTPUT CAN BE WORKED OUT ON CASE TO CASE BASIS]

    10. Retrofitting of HP Turbine with STATE OF ART REACTION BLADING

    14. EXISTING IMPULSE BLADING ( PRESSURE DROP ONLY IN STATIONARY BLADES) EFFICIENCY : 83.6 % (FOR NEW MACHINE) EFFICIENCY FOR EXISTING CONDITION : ~ 80% NEW REACTION BLADING ( PRESSURE DROP IN STATIONARY AS WELL AS MOVING BLADES EFFICIENCY : 86.5 % HP TURBINE

    15. ACTIVITIES INVOLVED REMOVAL OF EXISTING HP ROTOR, LINERS AND DIAPHRAGMS INSTALLATION OF NEW LINERS FITTED WITH STATIONARY BLADES AND NEW HP ROTOR FITTING DIMENSIONS ARE TO BE MEASURED DURING PREVIOUS OVERHAUL AND LINERS ARE MACHINED ACCORDINGLY. REMOVED HP ROTOR AND DIAPHRAGMS CAN BE USED AS SPARE FOR OTHER SETS

    16. THE RETROFIT CAN BE DONE WITHIN NORMAL OVERHAUL PERIOD. PAY BACK PERIOD IS LESS THAN 3 YEARS

    19. EXPECTED PERFORMANCE IMPROVEMENT IN THE EXISTING IMPULSE DESIGN SET DUE TO HP TURBINE REFURBISHMENT INCREASE IN POWER OUTPUT : 8.6 MW IMPROVEMENT IN HEATRATE : 4% (FROM EXISTING PERFORMANCE LEVEL OF THE SET WITH RATED STEAM PARAMETERS & THROTTLE STEAM FLOW)

    30. EXPECTED PERFORMANCE IMPROVEMENT IN THE EXISTING SET DUE TO LP TURBINE REFURBISHMENT INCREASE IN POWER OUTPUT : 10.1 MW IMPROVEMENT IN HEATRATE : 102 KCAL / KWH (FROM EXISTING PERFORMANCE LEVEL OF THE SET WITH RATED STEAM PARAMETERS & THROTTLE STEAM FLOW)

    35. TECHNICAL PROPOSAL

    36. CROSS SECTIONAL VIEW OF 210 MW STEAM TURBINE

    37. EXISTING DESIGN:

    39. HP INLET INSERTS

    40. HP INLET INSERTS

    41. IMPROVEMENTS IN PROPOSED DESIGN:

    42. IMPROVEMENTS IN PROPOSED DESIGN: (CONTD.)

    43. IMPROVEMENTS IN PROPOSED DESIGN: (CONTD.)

    44. HP EXHAUST ELBOWS

    45. HP EXHAUST ELBOWS

    46. HP EXHAUST ELBOWS

    47. SCOPE OF SUPPLY

    48. 210 MW STEAM TURBINE (REACTION DESIGN SET-KWU)

    49. SCOPE OF SUPPLY (CONTD.)

    50. WORK REQUIRED TO BE DONE AT SITE:

    51. WORK REQUIRED TO BE DONE AT SITE: (FOR HP Turbine)

    52. WORK REQUIRED TO BE DONE AT SITE:(CONTD.)

    53. WORK REQUIRED TO BE DONE AT SITE:(CONTD.)

    54. WORK REQUIRED TO BE DONE AT SITE:FOR IP Turbine

    55. CONDITION AFTER R & M OF HPT & IPT (UNDER RATED CONDITION):

    56. EXPECTED PRESENT PERFORMANCE:

    57. COMPARISON OF PERFORMANCE:

    58. PAY BACK PERIOD

    59. PAY BACK PERIOD

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