The document discusses methods for assessing the energy efficiency of boiler performance. It describes standards from British and ASME for testing boilers under steady load conditions. The direct and indirect methods for determining boiler efficiency are outlined. Instruments required are listed, including flue gas analyzers, temperature indicators, and facilities for analyzing fuel and water samples. Key aspects of indirect method heat balance calculations for a coal-fired boiler are mentioned. Best practices are listed for improving boiler selection, operation and maintenance for energy efficiency.

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 .

15. Summary of As run heat balance for Coal Fired Boiler

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