Desain Tunnel Sistem Pendingin Alami Mesin Induk Dengan Ujung Kerucut Untuk Penambahan Gaya Dorong Pada Kapal Ikan

Ilmi, Fauzani Nurul (2016) Desain Tunnel Sistem Pendingin Alami Mesin Induk Dengan Ujung Kerucut Untuk Penambahan Gaya Dorong Pada Kapal Ikan. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Mesin induk pada kapal dilengkapi dengan sistem pendingin. Tugas akhir ini menganalisa aliran air laut sebagai pendingin air tawar pada jacket cooling water system pada kapal. Sistem ini menggunakan lubang tunnel bersudut pada lambung kapal yang merupakan pengganti fungsi cooler box (heat exchanger) antara air tawar dan air laut dengan memanfaatkan konveksi alami air laut ketika kapal melaju dan bantuan impeller ketika kapal dalam keadaan diam atau manouvering. Penelitian dilakukan dengan memvariasikan kecepatan kapal, suhu air laut dan luas permukaan pipa heat exchanger. Kecepatan kapal divariasikan 10,8,6,4,2, dan 0 knot, suhu air laut 25-30oC dan luas permukaan divariasikan dengan menambah panjang pipa koil dengan diameter pipa tetap, yakni 0,1356 m2, 0,16956 m2 dan 0,20347 m2. Hasil yang didapatkan adalah kecepatan kapal tidak berpengaruh besar terhadap perpindahan panas, namun luas permukaan dan suhu air laut berpengaruh besar terhadap perpindahan panas. Kemudian pada sisi keluaran tunnel, diameter diperkecil 50% dan mengakibatkan kecepatan aliran bertambah dan menambah gaya dorong hingga 37,18 kN. ====================================================================================================== Main engine on the vessel is equipped with a cooling system. This final project analyze the flow of seawater as a coolant of fresh water jacket cooling water systems on ships. The system uses an angled tunnel hole in the hull which is to replace the function of cooler box (heat exchanger) between freshwater and seawater by utilizing the natural convection of sea water when the vessel move forward and use impeller when the vessel is stopping or manouvering. The study was conducted by varying the speed of the vessel, the temperature of the sea water and surface of heat exchanger pipe. Vessel speed is varying about 10,8,6,4,2, and 0 knots, the sea water temperature 25-30oC and surface area of pipe is varied by increasing the length of the pipe coil with diameter pipe fixed, ie 0.1356 m2, 0.16956 m2 and 0.20347 m2. The results obtained are the vessel's speed not affect heat transfer, but the surface area and the temperature of sea water big influence on heat transfer. Then on the output side of the tunnel, the diameter is reduced by 50% and resulted in the flow velocity increases and adds up to 37.18 kN thrust.

Item Type: Thesis (Undergraduate)
Additional Information: RSSP 621.402 5 Ilm d
Uncontrolled Keywords: sistem pendingin, heat exchanger, tunnel, nozzle
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers
Divisions: Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 18 Dec 2019 03:01
Last Modified: 18 Dec 2019 03:01
URI: http://repository.its.ac.id/id/eprint/72414

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