OPTIMISASI PERANCANGAN AIR TO FUEL RATIO CONTROL (AFRC) PADA TURBIN GAS MENGGUNAKAN METODE PLANTWIDE CONTROL

Amalia, Novita (2020) OPTIMISASI PERANCANGAN AIR TO FUEL RATIO CONTROL (AFRC) PADA TURBIN GAS MENGGUNAKAN METODE PLANTWIDE CONTROL. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Turbin gas adalah mesin penggerak fluida dengan memanfaatkan gas sebagai fluida kerja. Salah satu sistem pengendali yang perlu diperhatikan adalah masukan dari tungku pembakaran. Tungku pembakaran adalah komponen penting pada turbin gas yang berfungsi sebagai penghasil kalor. Pada penelitian ini dilakukan optimisasi sistem pengendali air to fuel ratio control (AFRC) menggunakan metode plantwide control (PWC). AFRC dibuat dengan memasang sistem pengendali cascade antara daya turbin dengan laju aliran massa bahan bakar. Laju aliran massa bahan bakar dihubungkan dengan laju aliran massa udara melalui kontrol rasio agar perbandingan diantara keduanya sesuai dengan AFR stoikiometri ataupun AFR optimum agar daya yang dihasilkan turbin maksimal. Rancangan AFRC ini merupakan perbaikan sistem pengendali turbin gas di PT. SIPL. Rancangan ini memiliki nilai maximum overshoot serta steady state error dibawah 2%. Nilai settling time dari laju aliran massa bahan bakar dan laju aliran massa udara ketika naik adalah 237 detik dan 268 detik. Sedangkan ketika turun adalah 207 detik dan 256 detik. AFRC ini mampu melakukan optimisasi daya turbin dari nilai semula 2093 kW menjadi 3199 kW dengan AFR optimum 20,53. Peningkatan daya ini dapat melakukan penghematan sebesar 785,864 US$/MMBTU ============================================================ A gas turbine is a fluid driving machine by utilizing gas as a working fluid. One control system that needs to be considered is the input from the furnace. The furnace is an important component in a gas turbine that functions as a heat producer. In this final project, and optimization of the air to fuel ratio control (AFRC) control system is done using the plantwide control (PWC) method. AFRC is made by installing a cascade control system between the power turbine and the mass flow rate of the fuel. Fuel mass flow rate with mass flow rate through the control ratio to match the stoichiometric AFR or AFR power so that the maximum turbine produced is optimal. This AFRC design is an improvement of the gas turbine control system at PT. SIPL. This design has a maximum overshoot value and also a steady-state error of under 2%. The completion time value of the mass flow rate of the fuel and the mass airflow compilation rate increased by 237 seconds and 268 seconds. Where as the compilation down is 207 seconds and 256 seconds. This AFRC can optimize turbines from their original value of 2093 kW to 3199 kW with an optimum AFR of 20,53. This increased power can make savings of 785,864 US$ / MMBTU

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Turbin Gas, Air to Fuel Ratio Control, Plantwide Control ========================================================= Gas Turbine, Air to Fuel Ratio Control, Plantwide Control
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ217 Adaptive control systems
T Technology > TS Manufactures > TS155 Production control. Production planning. Production management
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Novita Amalia
Date Deposited: 12 Aug 2020 04:56
Last Modified: 12 Aug 2020 04:56
URI: https://repository.its.ac.id/id/eprint/77644

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