Analisa Pengaruh Pemotongan Sudu Turbin Terhadap Kinerja Turbin Gas Mitsubishi 701 D Di Pltgu Gresik

Rahman, Fahmi Auliya (2019) Analisa Pengaruh Pemotongan Sudu Turbin Terhadap Kinerja Turbin Gas Mitsubishi 701 D Di Pltgu Gresik. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Turbin merupakan salah satu komponen utama dalam unit turbin gas. Turbin sendiri berfungsi merubah energi mekanik menjadi energi kinetic. Energi kinetic sendiri didapatkan dari gas bertekanan hasil pembakaran dari ruang bakar. Gas tersebut yang menggerakkan turbin gas sehingga dapat berputar dan menghasilkan listrik pada generator. Dengan gas bertekanan dan temperature yang tinggi serta jam operasi (lifetime) yang lama, dapat terjadi pemuaian pada rumah sudu (blade ring). Terjadinya pemuaian tersebut membuat jarak antara sudu dan rumah sudu (tip clearance) melewati standar sehingga terjadi pemotongan (grinding) pada sudu turbin agar tip clearance kembali semua. Pemotongan sudu membuat terjadinya perubahan pada kinerja turbin gas itu sendiri. Pada kinerja turbin gas dianalisa secara termodinamika dan melalui segitiga kecepatan. Pada Analisa termodinamika dilakukan dengan perbandingan unit turbin gas dengan pemotongan pada sudu dan unit turbin gas tanpa pemotongan pada sudu nya dengan beban 100 MW. sedangkan Analisa pada segitiga kecepatan dilakukan perhitungan pada kerja turbin dengan variasi pemotongan 1 mm pada diameternya. Dari hasil perhitungan dengan Analisa termodinamika didapatkan peningkatan pada daya turbin sebesar 1,441834 MW, Spesific Fuel Consumtion naik sebesar 0,926 %, Work Ratio naik sebesar 0,816 %, dan efisiensi siklus turun sebesar 1,01 %. Pada analisa segitiga kecepatan didapatkan penurunan pada kerja turbin dengan variasi pemotongan 1 mm pada diameternya sekitar 128,186 J/kg setiap mm.
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Turbine is one of the main components in the gas turbine unit. Turbine itself functions to convert mechanical energy into kinetic energy. Kinetic energy itself is obtained from pressurized gas from combustion results from the combustion chamber. The gas that drives the gas turbine so that it can spin and produce electricity at the generator. With high pressure and temperature gas and long lifetime, there can be expansion of the blade ring. The expansion makes the distance between the blade and tip clearance pass through the standard so that there is grinding on the turbine blade so that all tip clearance returns. Blade cutting causes a change in the performance of the gas turbine itself. The performance of the gas turbine is analyzed thermodynamically and through a speed triangle. Thermodynamic analysis is carried out by comparing the gas turbine unit with cutting on the blade and the gas turbine unit without cutting on the blade with a load of 100 MW. While the analysis of the speed triangle is calculated on the work of the turbine with a variation of 1 mm cutting on its diameter. From the results of calculations with thermodynamic analysis, an increase in turbine power of 1.441834 MW, Specific Fuel Consumtion increased by 0.926%, Work Ratio increased by 0.816%, and cycle efficiency decreased by 1.01%. In the analysis of the velocity triangle, a decrease in turbine work with a variation of 1 mm cutting at a diameter of about 128,186 J/kg per mm.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	sudu turbin gas, pemotongan sudu, pengaruh pemotongan pada kinerja gas turbine blade, blade cutting, the effect of cutting on performance.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1058 Rotors T Technology > TJ Mechanical engineering and machinery > TJ1230 Cutting and sawing machinery T Technology > TJ Mechanical engineering and machinery > TJ174 Maintenance and repair of machinery T Technology > TJ Mechanical engineering and machinery > TJ254.7 Combustion chambers T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General) T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Rahman Fahmi Auliya
Date Deposited:	13 Aug 2026 06:53
Last Modified:	13 Aug 2026 06:53
URI:	http://repository.its.ac.id/id/eprint/70129

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