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KAJI TERMODINAMIKA SIKLUS CETUS-BINER PLTP LAHENDONG

THERMODYNAMICS STUDY OF FLASH-BINARY CYCLE IN THE LAHENDONG GEOTHERMAL POWER PLANT

Undergraduate Theses from JBPTITBPP / 2017-09-27 10:40:53
Oleh : CHRISTIAN GUNAWAN (NIM : 13106008); Pembimbing 1 : Dr. Ir. Ari Darmawan Pasek; Pembimbing 2 : Prof. Dr. Ir. T.A. Fauzi Soelaiman, S1 - Department of Mechanical Engineering
Dibuat : 2010, dengan 7 file

Keyword : Siklus Cetus-Biner, Optimasi, Penukar Panas dan Fluida Kerja Organik

Penelitian ini dilakukan untuk mengetahui kinerja siklus cetus-biner bila diterapkan pada Pembangkit Listrik Tenaga Panas Bumi (PLTP), dimana sumber panasnya berasal dari brine sisa separator yang umumnya diinjeksikan kembali ke


dalam sumur. Dalam mengkaji siklus cetus-biner, digunakan empat jenis fluida kerja organik untuk siklus binernya, yaitu i-pentana, n-pentana, i-butana, dan n-butana.


Dilakukan proses optimasi terhadap kinerja sistem pembangkit, sehingga diperoleh kondisi paling optimum yang dapat menghasilkan daya netto maksimum. Dari penelitian ini, dilakukan juga proses perancangan termal untuk beberapa komponen pada sistem pembangkit, yaitu preheater, evaporator dan kondensor berpendingin udara.


Proses simulasi dan perancangan penukar panas dibantu dengan paket program HYSYS, Heat Transfer Research Inc. (HTRI), dan metode yang ada pada Gas Processors Supplier Association (GPSA). Hasil penelitian menunjukan pengaruh setiap parameter yang divariasikan (tekanan cetus, tekanan evaporator, 4 temperatur pinch, pembentukan kerak dan jenis fluida kerja organik) dalam menghasilkan daya netto maksimum pada PLTP.


Dari hasil kajian, didapatkan kesimpulan bahwa fluida kerja organik yang dapat menghasilkan daya netto maksimum sebesar 3077,64 kW adalah fluida kerja ipentana, pada kondisi tekanan cetus 600 kPa, tekanan evaporator 1500,60 kPa, dan


4 temperatur pinch 5 oC. Daya netto tersebut didapatkan setelah memperhatikan kemungkinan terbentuknya kerak pada temperatur brine keluar 122oC. Setelah dilakukan proses perancangan termal pada preheater, evaporator dan kondensor berpendingin udara, diperoleh daya netto siklus cetus-biner sebesar 2991,98 kW, efisiensi termal (ηt) 12,29% dan efisiensi utilisasi ( ηu) 23,06%.

Deskripsi Alternatif :

This study was conducted to evaluate the performance of a flash-binary cycle if applied to Geothermal Power Plant (PLTP), where the source of heat comes from the residual brine from the separator which is generally re-injected into wells.


In the study of flash-binary cycle, there are four types of organic working fluids considered for the binary cycle, namely i-pentane, n-pentane, i-butane, and n-butane.


Optimization process was carried out on the performance of plant systems. In order to obtain the optimum conditions that can produce the maximum net power, several components were also thermally designed in this study, such as: preheater, evaporator, and air cooled condenser.


Process simulation and design of heat exchangers were carried out by HYSYS, Heat Transfer Research Inc. (HTRI) program package, and methods that existed at the Gas Processors Supplier Association (GPSA). The results showed the influence of each parameter which was varied (flash pressure, evaporator pressure, 4 pinch temperature, scale formation and type of organic working fluid) to obtain the


optimum conditions required to produce the maximum net power at the Geothermal Power Plant and the main dimensions of the preheater, evaporator, and air-cooled condenser. From the study, it was concluded that i-pentane working fluid can produce a maximum net power of 3077,64 kW, in the condition of 600 kPa flash pressure, evaporator pressure of 1500,60 kPa, and 4 pinch temperature of 5 oC. Net power is


obtained after considering the possibility of formation of scale on the outlet brine temperature 122oC. After the thermal design process was performed for the preheater, evaporator and air-cooled condenser, the net power of flash-binary cycle was calculated is 2991,98 kW, thermal efficiency (ηt) of 12,29% and the efficiency of utilization (ηu) is 23,06%.

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NegaraIndonesia
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Kontributor...

  • Pembimbing 1 : Dr. Ir. Ari Darmawan Pasek;


    Pembimbing 2 : Prof. Dr. Ir. T.A. Fauzi Soelaiman
    , Editor: PKL-UIN-Raden Fatah

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