Analisa Pengaruh Unjuk Kerja Air Preheater Sebelum Dan Sesudah Overhaul Terhadap Efisiensi Boiler PT. Paiton Operation & Maintenance Indonesia Unit 8

Han, Dhewana Alnafis (2023) Analisa Pengaruh Unjuk Kerja Air Preheater Sebelum Dan Sesudah Overhaul Terhadap Efisiensi Boiler PT. Paiton Operation & Maintenance Indonesia Unit 8. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Air Preheater adalah alat untuk memanaskan udara yang disuplai menuju boiler. Air Preheater PLTU Paiton Unit 8 menggunakan Rotary Air Preheater jenis Ljungstrom yang digunakan untuk memanfaatkan sumber panas dari flue gas atau sisa pembakaran dari boiler dan kemudian terjadi perpindahan panas melalui elemen pemanas sehingga temperatur udara pembakaran primer dan sekunder akan meningkat. Air preheater yang dipakai secara berkelanjutan dalam beberapa waktu mengakibatkan penurunan efektivitas yang disebabkan oleh banyak faktor sehingga mempengaruhi efisiensi boiler sehingga perlu dilakukan overhaul pada air preheater. Penelitian ini bertujuan untuk melakukan analisa performansi pada Air Preheater sebelum dan sesudah Overhaul, melakukan analisa performansi boiler Sebelum dan sesudah Overhaul air preheater, dan mengetahui pengaruh overhaul Air Preheater terhadap performa air preheater dan efisiensi boiler.
Tahapan pada proyek kali ini melalui beberapa tahapan yaitu menghitung unjuk kerja air preheater menggunakan effectiveness NTU methode, dan air leakage serta X-ratio, yang mengacu pada Standar ASME (American Society of Mechanical Engineers) PTC 4.3 Performance Test Code for Air Heaters. Menghitung unjuk kerja boiler menggunakan indirect method mengacu pada Standar ASME 4.1 Power Test Code for Steam Generating Units. Melakukan analisa studi korelasi dan penarikan kesimpulan.
Hasil dari penelitian yang dilakukan menunjukan setelah overhaul, efektivitas ketiga unit air preheater mengalami peningkatan. Efektivitas pada Primary Air Preheater naik dari 90,03% menjadi 93,4%, sementara Secondary APH B meningkat dari 91,05% menjadi 93,5%. Secondary APH A setelah overhaul meningkat, yaitu 94,64% dibandingkan dengan sebelumnya yaitu 92,62%. 2. Akibat dari peningkatan kinerja tersebut, terjadi penurunan suhu keluaran flue gas dari 166,317 °C menjadi 155,454 °C. Perbaikan ini juga berdampak pada peningkatan efisiensi boiler dari 83,6842% menjadi 84,4371%.
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The Air Preheater is a device used to heat the air supplied to the boiler. The Air Preheater in Paiton Power Plant Unit 8 utilizes a Ljungstrom rotary air preheater, which is employed to utilize the heat source from the flue gas or combustion residuals of the boiler. Heat transfer occurs through heating elements, resulting in an increase in the temperature of the primary and secondary combustion air. Continuous usage of the air preheater over time leads to a decrease in its effectiveness, caused by various factors that affect the boiler's efficiency. Therefore, an overhaul of the air preheater is necessary. This research aims to understand the working principles of the Air Preheater, analyze the performance of the Air Preheater before and after the overhaul, analyze the boiler performance before and after the overhaul of the air preheater, and determine the impact of overhauling the Air Preheater on its performance and the boiler's efficiency.
The project consists of several stages, including calculating the performance of the air preheater using the effectiveness-NTU method, air leakage, and X-ratio, referring to the ASME (American Society of Mechanical Engineers) PTC 4.3 Performance Test Code for Air Heaters. Additionally, calculating the boiler performance using the indirect method, referring to the ASME 4.1 Power Test Code for Steam Generating Units. Lastly, conducting correlation analysis and drawing conclusions from the study.
The results of the research show that after the overhaul, the effectiveness of all three units of the air preheater improved. The effectiveness of the Primary Air Preheater increased from 90.03% to 93.4%, while the Secondary APH B increased from 91.05% to 93.5%. The Secondary APH A also experienced an increase after the overhaul, reaching 94.64% compared to the previous value of 92.62%. As a result of this performance improvement, the flue gas outlet temperature decreased from 166.317 °C to 155.454 °C. This improvement also led to an increase in the boiler's efficiency from 83,6842% to 84,4371%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Air Preheater, Overhaul, Efisiensi Boiler, Effectiveness-NTU
Subjects:	Q Science > QC Physics > QC320 Heat transfer T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers T Technology > TJ Mechanical engineering and machinery > TJ263.5 Boilers (general)
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Dhewana Alnafis Han
Date Deposited:	18 Jan 2024 07:40
Last Modified:	18 Jan 2024 07:40
URI:	http://repository.its.ac.id/id/eprint/102805

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