ANALISA EFISIENSI ISENTROPIK TURBIN UAP PADA PLTU 1 JAWA BARAT INDRAMAYU ( ISENTROPIC EFFICIENCY ANALYSIS ON STEAM TURBINE PLTU 1 JAWA BARAT INDRAMAYU )

Pamungkas, Bayu and Handayani, Sri Utami (2015) ANALISA EFISIENSI ISENTROPIK TURBIN UAP PADA PLTU 1 JAWA BARAT INDRAMAYU ( ISENTROPIC EFFICIENCY ANALYSIS ON STEAM TURBINE PLTU 1 JAWA BARAT INDRAMAYU ). Undergraduate thesis, D3 Kerjasama PT. PLN Bidang Mesin Fakultas Teknik.

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Abstract

Turbin pada PLTU 1 Jawa Barat Indramayu telah dioperasikan sejak tahun 2011 sehingga dimungkinkan terjadi penurunan kinerja. Untuk mengetahui penurunan kinerja dilakukan perhitunan efisiensi dengan membandingkan daya aktual dan daya isentropik turbin. Analisa efisiensi dilakukan pada unit #2. Perhitungan dilakukan untuk mencari besarnya nilai efisiensi isentropik (ɳis ), daya aktual turbin (Pact), daya turbin isentropis (Pis). Data parameter yang dibutuhkan untuk perhitungan diambil dari komputer pemantau operasi di central control room dan data pada performance test. Dari analisa efisiensi isentropik turbin diketahui bahwa efisiensi turbin tekanan rendah turun dari 95,6% menjadi 54,5% seiring dengan kenaikan beban. Penurunan di turbin tekanan rendah terjadi akibat kenaikan flow sehingga dayanya berkurang. Pada turbin tekanan menengah terjadi kenaikan efisiensi dari 72% menjadi 90,5% karena adanya kenaikan tekanan uap yang masuk ke reheater. Pada turbin tekanan tinggi efisiensinya konstan sekitar 80%.Untuk analisa daya aktual terhadap beban diperoleh selisih sekitar 0,4%-1,5%, hal itu menunjukan bahwa performa turbin dan generator masih baik. Kata Kunci : Efisiensi Isentropik, Turbin Uap, PLTU. Steam turbine in PLTU 1 Jawa Barat Indramayu has been operated since early 2011, therefore its performance may has decreased. Calculation of efficiency is needed to find out the decrease of performance by comparing between the actual power and isentropic power of steam turbine. The object of analyzis is turbine unit #2. Calculated performance indicator includes isentropic efficiency, actual power of steam turbine and isentropic power of steam turbine. Data of parameter required in calculation are obtained from operation monitoring computer in central control roo and data from performance test. From the analysis of isentropic efficiency, low pressure turbin efficiency decreased from 95,6% to 54,5% within the increase of unit load. This decrease is due to the increase of steam extraction flow that reduce power prodoced. Efficiency increase was found in intermediate pressure turbine from 72% to 90,5% due to increase of pressure in reheating process. Efficiency of high pressure turbine was found out constant. In comparation between actual power and unit load, a difference of 0,4%-1,5% shows that steam turbin and generator still in good condition. Keyword : Steam Turbine Isentropik Efficiency , Power .

Item Type:Thesis (Undergraduate)
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Faculty of Engineering > Diploma in Mechanical Engineering
Faculty of Engineering > Diploma in Mechanical Engineering
ID Code:47390
Deposited By:Mrs Wahyu D3 Teknik Mesin
Deposited On:20 Jan 2016 08:46
Last Modified:20 Jan 2016 08:46

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