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Patel Vraj

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Co-firing is important than coal firing

Co-firing is important than coal firing oOPx9

This paper examines the result of cofiring test to evaluate the aspect of operational, economic and environmental in 300 MW coal-fired power plant. The test conducted by mixing 5% of sawdust and 95% of coal as the fuel to compare with the result of using 100% coal firing (no sawdust added). Subsequently, the research found that in term of operational aspect, the NPHR value was 2587. 62 kCal/kWh and the SFC value was 0. 58 for cofiring tested. Furthermore, the research used coal prices and cofiring (combination of coal and sawdust) in kilograms (kg) to evaluate the economic aspect of cofiring tested. Consequently, there was a saving of production cost for coal purchase which accounted for Rp 128, 225, 473/MWh. Moreover, the value of SOx and NOx from the CEMS are used to evaluate the environmental aspect of cofiring. The result showed that the number of SOx and NOX tested in cofiring was not significantly difference to the test of using 100% coal firing. Additionally, the value was still bellow the minimum level of emission for Coal-Fire Power Plant or it was still meet the requirement from the Minister of the Environment of Indonesia. The future research is suggested to increase the proportion of sawdust to 20% until 30% in coal blending. The drying step is also required to avoid the wet sawdust being mixed automatically while blending the coal. Other thing that also need to be considered is cofiring test need to considering the slagging and the fouling which probably occurred faster rather than using 100 of coal as the main fuel while observed from the metal temperature in boiler area.

This paper examines the result of cofiring test
 to evaluate the aspect
 of operational, economic and environmental in 300 MW coal-fired power plant. The test
 conducted by mixing 5% of sawdust and 95% of coal as the fuel to compare with the result of using 100% coal firing (no sawdust added
). Subsequently
, the research found that in term of operational aspect
, the NPHR value
 was 2587. 62 kCal/kWh and the SFC value
 was 0. 58 for cofiring tested
. Furthermore
, the research used
 coal prices and cofiring (combination of coal and sawdust) in kilograms (kg) to evaluate the economic aspect
 of cofiring tested
. Consequently
, there was a saving of production cost for coal purchase
 which accounted for Rp 128, 225, 473/MWh. Moreover
, the value
 of SOx and NOx from the CEMS are used
 to evaluate the environmental aspect
 of cofiring. The result showed
 that the number of SOx and NOX tested
 in cofiring was not significantly
 difference to the test
 of using 100% coal firing. Additionally
, the value
 was still
 bellow the minimum level of emission for Coal-Fire Power Plant or it was still
meet
 the requirement from the Minister of the Environment of Indonesia. The future research is suggested
 to increase the proportion of sawdust to 20% until 30% in coal blending. The drying step is also
 required to avoid the wet sawdust being mixed
automatically
 while blending the coal. Other thing that also
 need to be considered
 is cofiring test
 need to considering the slagging and the fouling which probably
 occurred faster rather
 than using 100 of coal as the main fuel while observed from the metal temperature in boiler area. 

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IELTS essay Co-firing is important than coal firing

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