Utomo, Imam Siswo (2020) Study Eksperimental Pengaruh Nilai Persentase Excess Air Dan Ukuran Coal Fineness Batubara Terhadap Nilai Unburned Carbon Dan Efisiensi Boiler Dengan Batubara Nilai Kalori ± 4200 Kkal/Kg Pada PLTU Dengan Beban 500 MW. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PLTU Banten 1 Suralaya Operation and Maintenance Unit (BSLA OMU) adalah satu dari 12 unit Operation and Maintenance Unit (OMU) di dalam lingkungan PT Indonesia Power yang mendapat penugasan untuk memegang Operation and Maintenance (O&M) di PLTU Banten 1. Saat ini di PLTU Banten 1 Suralaya, pasokan batubara tersebut dipasok oleh 10 pemasok batubara dengan range nilai kalor batubara antara 4.200-4.900 kcal/kg HHV. Menurut desain awal, pola operasi pengisian batubara adalah dengan batubara nilai kalor ± 4200 kkal/kg, akan tetapi batubara nilai kalori ± 4200 kkal/kg itu sendiri memiliki berbagai macam variasi kadar ultimate. Variasi kadar ultimate dari batubara akan mempengaruhi udara pembakaran yang dibutuhkan dan kualitas coal fineness yang dihasilkan, sehingga kajian mendetail terhadap pengaruh kebutuhan udara berlebih (excess air) dan ukuran coal fineness terhadap effisensi boiler pada beban ± 625 MW. Akan tetapi karena kondisi material di boiler yang sudah berkurang kekuatannya maka pengambilan data untuk beberapa variasi kadar ultimate batubara nilai kalor ± 4200 kkal/kg dilakukan di PLTU pada saat beban 500 MW untuk menentukan kebutuhan udara pembakaran yang paling optimum. Efisiensi thermal boiler didefinisikan sebagai energi panas masuk yang digunakan secara efektif untuk menghasilkan uap. Ada dua metode pengkajian efisiensi boiler yaitu metode langsung (metode input output) dan metode tidak langsung (Heat Loss). Metode eksperimental yang dilakukan pada penelitian ini adalah dengan melakukan eksperimental dan mengambil data pada boiler PLTU pada saat beban 500 MW dengan batubara LRC dengan nilai kalori ± 4200 kkal/kg dengan variasi kadar ultimate batubara. Dari variasi kadar ultimate batubara dapat dihitung udara teoritis yang diperlukan. Tesis ini menggunakan study eksperimental variasi persentase excees air dan ukuran coal fineness terhadap unburn carbon dan efisiensi boiler yang dihasilkan Dari hasil eksperimen ini didapatkan kesimpulan bahwa nilai optimum excess air terhadap unburned carbon adalah diangka 10-12%. Sedangkan nilai optimum excess air terhadap efisiensi boiler adalah di 12% untuk batubara dengan nilai kalori ± 4200 kkal/kg pada beban 500 MW.
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Operation and Maintenance Unit of PLTU Banten 1 Suralaya (BSLA OMU) is one of 12 Operation and Maintenance Unit (OMU) within the PT INDONESIA POWER group that were assigned to hold Operation and Maintenance (O & M) at Banten 1 Suralaya Steam Power Plant. Currently, at Banten 1 Suralaya Steam Power Plant, The coal supply is supplied by 10 coal suppliers with a range of coal heat values ranging from 4,200-4,900 kcal/kg HHV. According to the initial design, the coal filling operation pattern is with coal a heating value of ± 4200 kcal/kg. But, the calorific value of ± 4200 kcal/kg coal itself has various variations in the ultimate analysis. The ultimate analysis variation of coal content will affect the required combustion air and the quality of coal fineness produced, so a detailed study of the effect of excess air and coal fineness on boiler efficiency at a load of ± 625 MW for several variations of the ultimate analysis levels of coal with heating value ± 4200 kcal/kg needs to be done at the Steam Power Plant at a load of 625 MW to determine the most optimum combustion air requirements. Because of degradation material tube boiler, maximum pressure in boiler was limited. So maximum load now at 500 MW. Thermal boiler efficiency is defined as the incoming heat energy that is used effectively to produce steam. There are two methods for evaluating boiler efficiency, namely direct method (input output method) and indirect method (Heat Loss). Because of material strenghtness boiler has decreased so that the experimental method carried out in this study was to conduct experiments and retrieve data on steam power plant boilers with a capacity of 500 MW with LRC coal with a calorific value of ± 4200 kcal / kg with variations in the ultimate levels of coal. From variations in the ultimate levels of coal theoretical air can be calculated as needed. This thesis uses an experimental study of variations in the percentage of water excees and the size of coal fineness on unburn carbon and the efficiency of the boilers produced. The Result of this experiment is that optimum excess air versus unburned carbon is in the range of 10-12%. while the optimum excess air on boiler efficiency is at 12% for coal with a calorific value of ± 4200 kcal/kg at a load of 500 MW.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 621.183 Uto s-1 2020 |
| Uncontrolled Keywords: | Efisiensi thermal, Boiler, Excess air, Unburned Carbon, Coal fineness |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ263.5 Boilers (general) |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Imam Siswo Utomo |
| Date Deposited: | 06 Mar 2025 06:26 |
| Last Modified: | 06 Mar 2025 06:26 |
| URI: | http://repository.its.ac.id/id/eprint/75357 |
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