Analisis Pemasangan Underwater Sill Terhadap Laju Sedimentasi Pada PLTU Banten 3 Lontar

Azis, Arsyad Abdul (2024) Analisis Pemasangan Underwater Sill Terhadap Laju Sedimentasi Pada PLTU Banten 3 Lontar. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PLTU Banten 3 Lontar merupakan salah satu PLTU di Indonesia yang berada di bawah naungan PT. PLN Indonesia Power untuk menyuplai listrik di pulau Jawa-Bali. Salah satu permasalahan yang terjadi di PLTU Banten 3 Lontar adalah sedimentasi. Sedimentasi yang terjadi di alur pelayaran dalam kolam jetty dapat mengganggu proses bongkar muat batu bara. Oleh sebab itu, penulis melakukan penelitian tugas akhir ini untuk menganalisis pemasangan underwater sill untuk menghambat laju sedimentasi yang terjadi, sehingga kegiatan maintenance dredging tidak memerlukan biaya yang besar karena volume sedimen yang akan dikeruk berkurang. Penelitian ini menggunakan metode numerik dengan bantuan software MIKE 21 untuk mengetahui kondisi hidrodinamika. Penelitian ini dilakukan dalam tiga kondisi yaitu kondisi eksisting sebelum ada bangunan underwater sill, kondisi setelah dibangun underwater sill dengan konfigurasi setengah lingkaran, serta kondisi setelah dibangun underwater sill dengan konfigurasi persegi panjang. Sebelum dilakukan pemodelan transport sedimen, dilakukan validasi data pasang surut dan arus menggunakan metode Root Mean Square Error (RMSE) dengan tingkat keakuratan yang baik. Hasilnya, apabila dibandingkan dengan kondisi eksisting sebelum dibangun underwater sill, didapatkan penurunan volume sedimen sebesar 29.068,02 m3 dengan membangun underwater sill berkonfigurasi persegi panjang dengan panjang 300 m. Selain itu, biaya yang dikeluarkan untuk 20 tahun ke depan juga berkurang sebesar Rp 9.571.295.473.
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Banten 3 Lontar Power Plant is one of the power plants in Indonesia under the management of PT. PLN Indonesia Power to supply electricity to the Java-Bali island. One of the problems that occur at Banten 3 Lontar Power Plant is sedimentation. Sedimentation in the navigation channel within the jetty basin can disrupt the coal loading and unloading process. Therefore, the author conducted this final project research to analyze the installation of an underwater sill to hinder the rate of sedimentation, thereby reducing the costs associated with maintenance dredging due to the decreased volume of sediment to be dredged. This research uses numerical methods with the help of MIKE 21 software to determine the hydrodynamic conditions. The research was conducted under three conditions: the existing condition before the underwater sill was built, the condition after the underwater sill was built with a semicircular configuration, and the condition after the underwater sill was built with a rectangular configuration. Before modeling sediment transport, data validation for tides and currents was performed using the Root Mean Square Error (RMSE) method with a high degree of accuracy. The results showed that, compared to the existing conditions before the underwater sill was built, there was a reduction in sediment volume of 29,068.02 m3 by constructing a rectangular underwater sill with a length of 300 m. Additionally, the costs incurred for the next 20 years were reduced by IDR 9.571.295.473.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	alur pelayaran, laju sedimentasi, underwater sill, maintenance dredging, shipping channel, sedimentation rates, underwater sill, maintenance dredging
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC175.2 Sediment transport T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Arsyad Abdul Azis
Date Deposited:	31 Jul 2024 07:50
Last Modified:	24 Sep 2024 06:25
URI:	http://repository.its.ac.id/id/eprint/109462

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