Evaluasi Efisiensi Boiler Pulverized Coal pada Co-Firing Sawdust PLTU Pacitan
DOI:
https://doi.org/10.58466/njh5st52Keywords:
boiler efficiency; co-firing; sawdust; pulverized coal; heat lossAbstract
This study evaluates boiler efficiency in a pulverized-coal steam power plant during direct co-firing of sawdust biomass at PLTU Pacitan Unit 1. The analysis uses operational and performance-test data for coal firing and co-firing schemes with 1%, 2%, and 5% sawdust at approximately 295 MW load. Boiler efficiency was calculated using the indirect heat-loss method based on ASME PTC 4, supported by fuel ultimate and proximate analysis, heat-loss components, fuel rate, air-heater gas temperature, and emission measurements. The results show that increasing sawdust composition changes fuel characteristics, especially lower gross calorific value, lower sulfur and ash content, higher total moisture, and lower Hardgrove Grindability Index. Boiler efficiency on an LHV basis reached 91.96% for 100% coal, 92.61% for 1% sawdust, 92.30% for 2% sawdust, and 91.74% for 5% sawdust. At 5% co-firing, fuel consumption increased by about 1.19% compared with coal firing, while SO2, NOx, and particulate emissions decreased and remained below the regulatory limits. The study indicates that sawdust co-firing can support emission reduction, but boiler efficiency and fuel handling require continuous monitoring
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References
[1] American Society of Mechanical Engineers. ASME PTC 4.1-2008: Fired Steam Generators Performance Test Code. New York: ASME; 2008.
[2] Febriani SDA, Purwanto MR. Analysis of boiler engine efficiency Unit 2 PT PJB UP Paiton. Journal of Physics: Conference Series. 2020;1085:2-12. doi:10.1088/1742-6596/1085/1/012012.
[3] Ilham MF, Suedy SWA. Pengaruh co-firing menggunakan sawdust terhadap nilai heat rate PLTU. Jurnal Energi Baru & Terbarukan. 2022;3(2):121-127.
[4] Sidiq AN. Pengaruh co-firing biomassa terhadap efisiensi boiler PLTU batubara. KILAT. 2022;11(1):1-11.
[5] Dwiaji YC. Analisis pengaruh co-firing biomassa terhadap kinerja peralatan boiler PLTU batubara Unit 1 PT XYZ. JAMERE. 2023;3(1):8-16.
[6] Ronaldo R, Riza A, Tanujaya H. Pengaruh air fuel ratio terhadap distribusi temperatur pulverized coal boiler. Indonesian Journal of Applied Science and Technology. 2021;2(2):44-50.
[7] Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia. Peraturan Menteri LHK Nomor P.15/MENLHK/SETJEN/KUM.1/4/2019 tentang baku mutu emisi pembangkit listrik tenaga termal. Jakarta: KLHK; 2019.
[8] Sudirmanto. Buku Materi Kuliah Teknik Tenaga Uap dan Gas. Jakarta: Institut Teknologi PLN; 2023.
[9] PT PLN (Persero). Buku Rencana Kerja dan Anggaran Perusahaan Tahun 2024. Jakarta: PT PLN (Persero); 2024.
[10] Aprilia CA. Analisis Kelayakan Biomass Co-Firing di PLTU Batubara Indonesia. Bandung: Institut Teknologi Bandung; 2022.
[11] Dongfang Boiler Group Co., Ltd. Boiler performance and design document DG1025/17.4-II13. Dongfang Boiler Group; 2009.
[12] PLN Puslitbang dan Universitas Gadjah Mada. Studi potensi biomassa untuk co-firing PLTU pada 38 kabupaten/kota. Yogyakarta: UGM; 2020.
[13] PT PLN Nusantara Power UP Pacitan. Data produksi bahan bakar dan operasi co-firing PLTU Pacitan. Pacitan: PLN NP; 2023.
[14] Presiden Republik Indonesia. Peraturan Presiden Nomor 22 Tahun 2017 tentang Rencana Umum Energi Nasional. Jakarta: Sekretariat Negara; 2017.
[15] Livingston WR. Biomass co-firing technology with policies, challenges, and opportunities. London: IEA Clean Coal Centre; 2016.
[16] Putra TS, Prabowo E, Ramadani F. Pengaruh Overhaul Terhadap Kinerja High Pressure Heater Unit 3 PLTU Banten Lontar. JTM: JURNAL TEKNIK MESIN. 2026 Feb 1;2(1):10-5.
[17] Roni MS, Chowdhury S, Mamun S, Marufuzzaman M, Lein W, Johnson S. Biomass co-firing technology with policies, challenges, and opportunities: A global review. Renewable and Sustainable Energy Reviews. 2017;78:1089-1101.
[18] Tillman DA. Biomass cofiring: the technology, the experience, the combustion consequences. Biomass and Bioenergy. 2000;19(6):365-384.
[19] Baxter L. Biomass-coal co-combustion: opportunity for affordable renewable energy. Fuel. 2005;84(10):1295-1302.
[20] Koppejan J, Baxter L. The status of large scale biomass firing: the milling and combustion of biomass materials in large pulverised coal boilers. IEA Bioenergy Task 32; 2016.
[21] Basu P. Biomass Gasification, Pyrolysis and Torrefaction: Practical Design and Theory. 3rd ed. London: Academic Press; 2018.
[22] Van Loo S, Koppejan J, editors. The Handbook of Biomass Combustion and Co-firing. 2nd ed. London: Earthscan; 2008.
[23] Vassilev SV, Baxter D, Andersen LK, Vassileva CG. An overview of the chemical composition of biomass. Fuel. 2010;89(5):913-933.
[24] Jenkins BM, Baxter LL, Miles TR, Miles TR Jr. Combustion properties of biomass. Fuel Processing Technology. 1998;54(1-3):17-46.
[25] Niu Y, Tan H, Hui S. Ash-related issues during biomass combustion: alkali-induced slagging, silicate melt-induced slagging, and ash deposition. Progress in Energy and Combustion Science. 2016;52:1-61.
[26] Arifin Z, Hidayatno A, Susanto H. Techno-economic analysis of co-firing for pulverized coal boiler power plants in Indonesia. International Journal of Renewable Energy Development. 2023;12(2):310-321.
[27] U.S. Department of Energy. Biomass Cofiring in Coal-Fired Boilers. Washington, DC: Federal Energy Management Program; 2004.
[28] Cengel YA, Ghajar AJ. Heat and Mass Transfer: Fundamentals and Applications. 5th ed. New York: McGraw-Hill Education; 2015.
[29] El-Wakil MM. Powerplant Technology. New York: McGraw-Hill; 1984.
[30] Cengel YA, Boles MA. Thermodynamics: An Engineering Approach. 8th ed. New York: McGraw-Hill Education; 2015.
[31] McKendry P. Energy production from biomass (part 1): overview of biomass. Bioresource Technology. 2002;83(1):37-46.
[32] Demirbas A. Combustion characteristics of different biomass fuels. Progress in Energy and Combustion Science. 2004;30(2):219-230.
[33] Werther J, Saenger M, Hartge EU, Ogada T, Siagi Z. Combustion of agricultural residues. Progress in Energy and Combustion Science. 2000;26(1):1-27.
[34] Pronobis M. Evaluation of the influence of biomass co-combustion on boiler furnace slagging by means of fusibility correlations. Biomass and Bioenergy. 2005;28(4):375-383.
[35] Sami M, Annamalai K, Wooldridge M. Co-firing of coal and biomass fuel blends. Progress in Energy and Combustion Science. 2001;27(2):171-214.
[36] Vamvuka D, Kakaras E, Kastanaki E, Grammelis P. Pyrolysis characteristics and kinetics of biomass residuals mixtures with lignite. Fuel. 2003;82(15-17):1949-1960.
[37] Tumuluru JS, Sokhansanj S, Hess JR, Wright CT, Boardman RD. A review on biomass torrefaction process and product properties for energy applications. Industrial Biotechnology. 2011;7(5):384-401.
[38] Obernberger I, Brunner T, Barnthaler G. Chemical properties of solid biofuels - significance and impact. Biomass and Bioenergy. 2006;30(11):973-982.
[39] Yin C. A review on biomass co-firing in pulverized coal fired power plants. Biomass and Bioenergy. 2013;52:39-46.
[40] Spliethoff H. Power Generation from Solid Fuels. Berlin: Springer; 2010.
[41] Saidur R, Abdelaziz EA, Demirbas A, Hossain MS, Mekhilef S. A review on biomass as a fuel for boilers. Renewable and Sustainable Energy Reviews. 2011;15(5):2262-2289.
[42] Nussbaumer T. Combustion and co-combustion of biomass: fundamentals, technologies, and primary measures for emission reduction. Energy and Fuels. 2003;17(6):1510-1521.
[43] Miles TR, Miles TR Jr, Baxter LL, Bryers RW, Jenkins BM, Oden LL. Boiler deposits from firing biomass fuels. Biomass and Bioenergy. 1996;10(2-3):125-138.
[44] Zevenhoven-Onderwater M, Blomquist JP, Skrifvars BJ, Backman R, Hupa M. The prediction of behaviour of ashes from five different solid fuels in fluidised bed combustion. Fuel. 2000;79(11):1353-1361.
[45] Frandsen FJ. Utilizing biomass and waste for power production - a decade of contributing to the understanding, interpretation and analysis of deposits and corrosion products. Fuel. 2005;84(10):1277-1294.
[46] Munir S, Nimmo W, Gibbs BM. The effect of air staged co-combustion of pulverised coal and biomass blends on NOx emissions and combustion efficiency. Fuel. 2011;90(1):126-135.
[47] Raveendran K, Ganesh A, Khilar KC. Pyrolysis characteristics of biomass and biomass components. Fuel. 1996;75(8):987-998.[48] Putra TS, Prabowo E, Ramadani F. Pengaruh Overhaul Terhadap Kinerja High Pressure Heater Unit 3 PLTU Banten Lontar. JTM: JURNAL TEKNIK MESIN. 2026 Feb 1;2(1):10-5.
