Analisa Geometri Pontoon dan Mooring Line Terhadap Respon Hidrodinamik - Studi kasus MV Barges Waduk Cirata, Jawa Barat.

Harahap, Daniel Haposan (2024) Analisa Geometri Pontoon dan Mooring Line Terhadap Respon Hidrodinamik - Studi kasus MV Barges Waduk Cirata, Jawa Barat. Masters thesis, Institut Teknologi Sepuluh November.

Text 60472221059_Master_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 July 2026. Download (4MB) | Request a copy

Abstract

FPV (Floating PhotoVoltaics) merupakan teknologi penghasil energi terbarukan yang memanfaatkan tenaga surya dan cocok untuk kondisi operasional di danau wilayah Indonesia. Keseluruhan sistem kerja komponen teknologi transformasi energi dari FPV bekerja diatas bangunan apung jenis pontoon. FPV berkapasitas 145MW dirancang untuk beroperasi di Waduk Cirata diatas pontoon sepanjang 16.5 meter. Terobosan pemikiran dan ide saat ini menciptakan variasi desain lambung pontoon yang berbeda dengan pertimbangan biaya dan efisiensi kerja yang baik. Kinerja pontoon akan memengaruhi efisiensi sistem pembangkit energi pada kondisi lingkungan operasi dan ekstrim. Diusulkan dua model operasi dengan satu ukuran principal dimension terhadap geometri yang berbeda. Analisis dilakukan dengan tinggi gelombang 0.2 meter pada kondisi operasional dan 0.88 meter di kondisi ekstrem. Kecepatan angin pada posisi 10 meter diatas permukaan air laut sebesar 20 meter/detik pada kondisi operasi dan 39.9 meter/detik pada kondisi ekstrem. Prinsip konfigurasi sistem tambat menggunakan spread mooring dengan 8 tali yang terbagi menjadi 4 group dengan jarak 50 satu sama lain. Ujung mooring tertancap pada anchor di dasar air dengan komponen studless mooring chain berukuran 22milimeter diameter berkapasistas 400kN. Analisis tegangan tarik dilakukan sepanjang mooring line dengan dua skema konfigurasi 8 tali dan 7 tali (satu tali diputus) pada kondisi lingkungan operasi dan ekstrem. Kondisi pontoon pada analisa free floating menghasilkan nilai RAO (Response Amplitude Operator) untuk gerak rotasi dan translasi. Model A menghasilkan respon maksimum yang lebih kecil daripada model B dengan nilai RAO roll 22.029 (deg/m) dan 0.982 (m/m) sway. Tegangan maksimum yang terjadi pada mooring line pada analisa ULS (Ultimate Limity State) di kondisi operasi dan ekstrem pada kedua model variasi dinyatakan aman dengan maximum tension 138.39 kN masih diatas angka safety 2.5 pada kondisi ekstrem. Namun pada analisa ALS (Accidental Limit State) di kondisi ekstrem kedua model mengalami kegagalan dengan nilai tegangan maksimum melewati batas safety factor yang terjadi pada mooring line 1, 2, 5, 6. Kegagalan akibat tegangan maksimum terkecil pada model A sebesar 164.39 kN dengan SF 2.4 dan pergeseran kapal maksimum pada model A sebesar 16 meter pada kondisi ekstrem
=====================================================================================================================================
FPV (Floating PhotoVoltaics) is a renewable energy producing technology that utilizes solar power and is suitable for operational conditions in Indonesian lakes. The entire working system of the energy transformation technology components of FPV works on a pontoon type floating building. The 145MW capacity FPV is designed to operate in the Cirata Reservoir on a 16.5 meter long pontoon. Current breakthroughs in thinking and ideas create different variations of pontoon hull designs with good consideration of cost and work efficiency. Pontoon performance will affect the efficiency of the energy generation system in operating and extreme environmental conditions. Two operating models with one principal dimension for different geometries are proposed. The analysis was carried out with a wave height of 0.2 meters in operational conditions and 0.88 meters in extreme conditions. Wind speed at a position 10 meters above sea level is 20 meters/second in operating conditions and 39.9 meters/second in extreme conditions. The principle of mooring system configuration uses spread mooring with 8 ropes divided into 4 groups with a distance of 50 from each other. The end of the mooring is stuck to an anchor at the bottom of the water with a studless mooring chain component measuring 22 millimeters in diameter with a capacity of 400 kN. Tensile stress analysis was carried out along the mooring line with two configuration schemes of 8 ropes and 7 ropes (one rope was broken) in operating and extreme environmental conditions. Pontoon conditions in free floating analysis produce RAO (Response Amplitude Operator) values for rotational and translational motion. Model A produces a smaller maximum response than model B with RAO roll values of 22.029 (deg/m) and 0.982 (m/m) sway. The maximum tension that occurs on the mooring line in the ULS (Ultimate Limity State) analysis in operating and extreme conditions in both variation models is declared safe with a maximum tension of 138.39 kN, still above the safety figure of 2.5 in extreme conditions. However, in the ALS (Accidental Limit State) analysis in extreme conditions, both models failed with the maximum stress value exceeding the safety factor limit which occurred on mooring lines 1, 2, 5, 6. Failure due to the smallest maximum stress in model A was 164.39 kN with SF 2.4 and the maximum ship displacement in model A is 16 meters in extreme conditions

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Maximum Tension, Offset, Pontoon, RAO, SF
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power. T Technology > TC Hydraulic engineering. Ocean engineering > TC363 Floating harbors. Including floating docks, piers, etc
Divisions:	Interdisciplinary School of Management and Technology (SIMT) > 61101-Master of Technology Management (MMT)
Depositing User:	Daniel Haposan Harahap
Date Deposited:	06 Feb 2024 06:26
Last Modified:	06 Feb 2024 06:26
URI:	http://repository.its.ac.id/id/eprint/106292

Actions (login required)

View Item