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KEY RESULT AREAS IN THERMAL POWER PLANT. A) HT/LT AUXILIARIES FD fans ID fans Boiler feed Water pumps Condensate extraction pumps Circulation Cooling Water Pumping system Cooling Towers CT Fans PA fans Coal Mills. KEY RESULT AREAS IN THERMAL POWER PLANTS. B) OFF-SITES

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KEY RESULT AREAS IN THERMAL POWER PLANT


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    Presentation Transcript
    1. KEY RESULT AREAS IN THERMAL POWER PLANT • A) HT/LT AUXILIARIES • FD fans • ID fans • Boiler feed Water pumps • Condensate extraction pumps • Circulation Cooling Water Pumping system • Cooling Towers • CT Fans • PA fans • Coal Mills

    2. KEY RESULT AREAS IN THERMAL POWER PLANTS • B) OFF-SITES • Raw Water pumping system • Coal handling plant • Ash handling plant • Compressed air • Refrigeration & air conditioning • Lighting • C) THERMAL AREAS • Boilers • Turbines • Condensers • Regenerative Feed heaters • Economizers • Air Pre-heaters

    3. KEY RESULT AREAS IN THERMAL POWER PLANT • D) OTHER SUB-SYSTEMS • Insulation studies to reduce heat losses • Thermography studies of switch yards & transformers • Fuel oil system

    4. TYPICAL ENERGY AUDIT SPECIFICS BOILER FEED PUMPS • 20 % OF TPS AUXILIARY CONSUMPTION IN BFP’s ALONE • ESTABLISH PERCENTAGE LOADING ON HEAD, FLOW, AND EFFICIENCY • IMPROVEMENT AREAS INCLUDE: • FRS PRESSURE DROP OPTIMISATION • TIMELY CATRIDGE REPLACEMENT • TDBFP IN PLACE OF MD BFP • O & M RELATED MEASURES AND IMPROVEMENTS

    5. TYPICAL ENERGY AUDIT SPECIFICS DRAFT SYSTEM

    6. TYPICAL ENERGY AUDIT SPECIFICS COAL HANDLING PLANT • SPECIFIC ENERGY CONSUMPTION • COMPARISON BETWEEN DIRECT BUNKERING VERSUS STACKER RECLAIMER ROUTE • AVOIDING SHORT TIME OPERATION OF THE SYSTEMS • MINIMISING IDLE/LOW LOAD CONVEYOR RUNS • O & M MEASURES ON CONVEYORS, CRUSHERS • BETTER SCREENING OF COAL BY GRIZZLEYS, BYPASSING, ETC. • DELSTAR STARTERS IN DE FANS

    7. TYPICAL ENERGY AUDIT SPECIFICS ASH HANDLING PLANT • OPTIMISING ASH TO WATER RATIOS CLOSE TO DESIGN (1 : 7 CAN GO UPTO 1 : 20) • TIMELY REPLACEMENT OF SLURRY PUMP INTERNALS AND SLURRY PUMP FOR HIGH ENERGY • OPTIMISING SYSTEM RUNNING HOURS • WATER SAVINGS BY BETTER NOZZLES, NOZZLE SIZE REDUCTION

    8. TYPICAL ENERGY AUDIT SPECIFICS MILLING SYSTEM • BETTER SCREENING TO AVOID UNDERSIZED / LARGE LUMPS CRUSHING • ENSURING PROPER AIR TO COAL RATIO, PRIMARY AIR COAL TEMPERATURE • O & M PRACTICES IN FINE SEPARATORS, MILL LOADING IMPROVEMENTS, REJECTS CONTROL • FOUR MILL OPERATION • TIMELY REPLACEMENT OF GRINDING MEDIA.

    9. TYPICAL ENERGY AUDIT SPECIFICS CW SYSTEM • ON-LINE CLEANING FOR MINIMISING FOULING FACTOR, HEAT TRANSFER EFFECTIVENESS • ENSURING ADEQUACY OF CW FLOW FOR GIVEN THERMAL LOAD • BETTER CT OPERATIONS FOR MINIMISING INLET CWT • 1OC CWT = 5 k Cal HEAT RATE BENEFITS

    10. TYPICAL ENERGY AUDIT SPECIFICS CW SYSTEM – COOLING TOWERS • ESTABLISH RANGE, APPROACH, TTD, THERMAL LOAD W.R.T. DESIGN • ESTABLISH ACTUAL L / G RATIOS VIS-À-VIS DESIGN • OPTIONS TO IMPROVE INCLUDE: • COC IMPROVEMENTS AS TECHNOLOGY MEASURE • ADJUSTING WATER LOADING IN CT CELLS • BLADE ANGLE ADJUSTMENT IN CT FANS • FRP BLADES IN CT FANS

    11. TYPICAL ENERGY AUDIT SPECIFICS WATER BALANCE • ADEQUACY OF CW FLOW TO CONDENSERS • OPTIONS FOR ASH-WATER RATIO IMPROVEMENTS • LOSSES AVOIDABLE IN RAW WATER, CLARIFIED WATER, DM WATER STREAMS

    12. TYPICAL ENERGY AUDIT SPECIFICS LT AUXILIARIES • LIGHTING RELATED IMPROVEMENTS • ESP [CHARGE RATIO CONTROL] • CONVEYORS (IDLE/PART LOAD OPERATION] • AIR COMPRESSORS (LEAKAGES, INTER-COOLER / AFTER COOLERS PERFORMANCE, ETC. • A/C PLANTS (ADEQUACY OF CHILLED WATER, CONDENSER WATER, O & M UPKEEP, ETC.]

    13. TYPICAL ENERGY AUDIT SPECIFICS INFRA-RED THERMOGRAPHY • SURVEY SWITCHYARD EQUIPMENTS, OVERHEAD TRANSMISSION LINES, • THERMAL INSULATION FOR HOT SPOTS, • O & M IMPROVEMENT OPTIONS

    14. PAST NPC STUDIES IN POWER PLANTS • For NTPC plants – Addressing various systems, at : NTPC VINDHYACHAL , SHAKTINAGAR, RIHAND, RAMAGUNDAM, TALCHER –KANIHA, TALCHER ANGUL, SIMHADRI, KORBA, KAWAS, FARAKKA, DADRI, AURIYA, UNCHAHAR, KAYAMKULAM,BALCO. • State plants of GTPS Gandhinagar • Secondary oil studies for PCRA , Normative coal consumption for Coal India ltd.

    15. PREPARATORY ACTIVITIES ENVISAGED FOR PERFORMANCE IMPROVEMENT STUDIES AT STATIONS • Plant/equipment Technical specifications and monthly operating data on Unitwise performance. • Inputs on specific areas of concern. • Based on the above, and, audit study findings, a Road map / action plan for achieving MOU targets/ERC Targets by can be prepared by NPC.

    16. Any Questions ?

    17. THANK YOU