Abstract:
This study aims to determine the value of commissioning boiler efficiency
compared with current value and to know the causes of efficiency decrease in Unit
2 Boiler of Asam Asam Coal Fired Steam Power Plant. This research begins with
collecting data of Performance Test during commissioning and current four years
data from 2014 until 2018. Furthermore, heat losses that carried out are calculated
and compared. Calculations performed using ASME PTC 4-2008 Standard Heat
Loss Method. Based on the calculation results, it can be conclude that the highest
HHV base Boiler Efficiency value in Unit 2 of Asam Asam Power Plant is
86.23% at Commissioning and the second highest HHV Base Boiler Efficiency
value is 84.42% on August 9, 2017, while the lowest HHV base Boiler Efficiency
is 82.12% on October 2, 2014. Heat loss that most affects the efficiency of Unit 2
Boiler is Heat Loss due to Heat in Dry Flue Gas (5.79% - 7.96%), Heat Loss due
to Moisture in Fuel (4.07% - 5.57) %) and the Heat Loss due to Moisture from
Burning of Hydrogen in Fuel (3.85% - 5.04%).
