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As run boiler performance assessment for energy efficiency

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  • 1. AS RUN BOILER PERFORMANCE ASSESSMENT FOR ENERGY EFFICIENCY D PAWAN KUMAR
  • 2.   Useful reference standards British standard, BS845: 1987 This describes the methods and conditions under which a boiler should be tested. Boiler should be operated under steady load conditions (generally full load) for a period of one hour before taking reading ASME Standard: PTC-4-1 _Power Test Code for Steam Generating Units            Part One: Direct method (also called as Input -output method)         Part Two: Indirect method (also called as Heat loss method)   IS 8753: Indian Standard for Boiler Efficiency Testing   All standards do not include blow down as a loss in the efficiency determination process.
  • 3. Direct Method of as run Trials:
  • 4. Indirect Method of as run Trials:
  • 5. INSTRUMENTS REQUIRED: Flue gas analysers Portable temperature indicator On-line instruments of boiler control room. Facilities of the chemistry lab or outside lab for coal / ash / water analysis. (coal proximate or ultimate analysis, un-burnt in bottom and fly ash, TDS, pH of feed water / blow-down / condensate. Power analyser for power measurement of ID fan, FD fan, ESP, crushers, BFP (boiler feed water pump) cool handling plant/ash handling plant, etc.
  • 6. The illustrative data collected is for a boiler using coal as fuel. Assessing the as run boiler efficiency by indirect method .
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  • 15. Summary of As run heat balance for Coal Fired Boiler
  • 16.
    • Good Practices in Boiler selection and O&M for energy efficiency:
    • Fuel shift
    • Drivers – cost, availability & CDM
    • Technology shift to Fluidized bed combustion boilers
    • Drivers – compatibility with low grade and agro fuels, and cost economy and CDM
    • Adopting Burners with oxygen trim systems for excess air control
    • Surface blow down control with blow down heat recovery systems
    • Adopting boiler house automation for draft & level control, for efficient operation
    • Optimizing Waste heat recovery (economizers and air pre-heaters)
    • Adopting Saturated steam turbines
    • Variable speed drives adoption for Boiler feed water pumps, FD/ID fans for capacity control
    • Adopting Steam accumulators where feasible
    • Good use of Energy Audit instruments
  • 17. THANK YOU

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