Characteristics of medium-low rank coal blending on performance and efficiency steam power plant

Coal that is often used in Steam Power Plants is a type of Low Rank Coal (Low Rank Coal) which has a caloric value of 4200 kcal / kg with a moisture content of 40%. Coal with water content that reaches 40% can cause the efficiency process of the plant to be not optimal. Low efficiency values will cause the use of electricity to increase and the combustion process to be incomplete so that it can cause many losses to the Steam Power Plant. From this problem, there needs to be a process of drying coal in order to reduce water content, the technology used in the process of drying coal is coal dryer. Design of coal dryer required source of steam or heat for drying process. Steam Power Plant there is steam waste extraction from turbines that can be used as a heat source to heat coal. If this extraction vapor is utilized, it can reduce the load from the condenser. The amount of turbine extraction steam that can be received by the coal dryer depends on the design of the coal dryer, because the design process of the coal dryer will affect the availability of energy in the coal dryer. This paper will discuss about optimization calculation with genetic algorithm method, to obtain the best design of coal dryer so that the heat received can be maximized so that the drying process becomes faster.

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A study on the Performance and Reliability Effect of Low-Rank Coal to the Steam Power Plant

Journal of Physics Conference Series ◽

10.1088/1742-6596/1845/1/012053 ◽

2021 ◽

Vol 1845 (1) ◽

pp. 012053

Author(s):

H Yudisaputro ◽

W Caesarendra ◽

M N Yuniarto ◽

Yohanes

Keyword(s):

Power Plant ◽

Low Rank ◽

Low Rank Coal ◽

Steam Power ◽

Steam Power Plant

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The performance of Pacitan Power Plant (pulverized boiler) toward the blending coal: an experimental

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/882/1/012039 ◽

2021 ◽

Vol 882 (1) ◽

pp. 012039

Author(s):

Rasgianti ◽

N Cahyo ◽

E Supriyanto ◽

R B Sitanggang ◽

M Triani ◽

...

Keyword(s):

Power Plant ◽

Heat Rate ◽

Plant Performance ◽

Low Rank ◽

Low Rank Coal ◽

Balanced Approach ◽

Coal Blending ◽

Rate Calculation ◽

Loss Method ◽

The Impact

Abstract Coal blending testing of medium rank coal (MRC) and low-rank coal (LRC) in the Pacitan power plant with pulverized boiler type was conducted to increase the use of readily available coal. It was necessary to ensure the impact of the blending coal on the boiler performance. Therefore, this study was aimed to examine the performance of the plant. There were two coal blending configurations in testing; a) Combo #1: 75% of LRC and 25% MRC; b) Combo #2: 60% of LRC and 40% MRC. Each combination was held in 4 schemes of load at 165 MW, 210 MW, 255 MW, and 300 MW. Heat rate calculation was determined with the heat loss method (energy balanced approach). As a result, compared to the commissioning test (2,270 kCal/kWh), the power plant performance decreased. The performance of combo #1 obtained 2,517 kcal/kWh; meanwhile, combo #2‘s performance showed 2,360 kcal/kWh.

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