AS RUN BOILER PERFORMANCE ASSESSMENT FOR ENERGY EFFICIENCY D PAWAN KUMAR
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.
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.
The illustrative data collected is for a boiler using coal as fuel. Assessing the as run boiler efficiency by indirect method .