KURANGNYA TEKANAN HYDROPHORE TANK YANG BERPENGARUH TERHADAP MENURUNNYA SUPPLY AIR TAWAR KE AKOMODASI DI MV. TANTO NUSANTARA

INTISARI Prasetyo, Zuhdi,2020, NIT: 52155819 T, “Kurangnya tekanan Hydrophore Tank yang berpengaruh terhadap menurunnya Supply air tawar ke akomodasi di MV. Tanto Nusantara”, skripsi Program Studi Teknika, Program Diploma IV, Politeknik Ilmu Pelayaran Semarang, Pembimbing I: H. Rahyono, SP.1, MM, M.Mar.E, Pembimbing II: R.A.J Susilo Hadi Wibowo,S.IP,MM. Hydrophore Tank adalah tanki air tawar bertekanan yang berfungsi untuk mensuplai air tawar ke akomodasi guna memenuhi kebutuhan air tawar bagi crew kapal. Tujuan dari skripsi ini adalah 1)menganalisa kerusakan pada mechanichal seal feed water pump hydrophore tank, 2)menganalisa bocornya packing pada sambungan pipa hydrophore tank, 3)menganalisa kerusakan pada spring atau pegas delivery valve. Metode penelitian yang penulis gunakan adalah metode fishbone analysis, dimana fishbone analysis digunakan untuk menganalisa dari permasalahan, dan digunakan untuk pembahasan dan menentukan upaya permasalahan. Hasil yang diperoleh dari penelitian ini menunjukan bahwa penyebab ketidak normalan kerja hydrophore tank terhadap supply air tawar ke akomodasi adalah feed water pump tidak bekerja dengan normal, mengalami masalah pada tidak kedapnya packing dan mengalami masalah pada delivery valve. Cara mengatasi permasalahan di atas adalah melakukan menggantian komponen yang rusak dengan yang baru dan sesuai dengan manual book, melakukan pengecekan dan perawatan secara periodik/berkala terhadap komponen dan system dari hydrophore tank agar sistem hydrophore tank dapat berjalan dengan baik dan normal kembali. ABSTRACT Prasetyo Zuhdi.2020, NIT: 52155806 T, “Lack Of Hydrophore Tank Pressure Wich Has An Effact on Decreasing Supply Of Fresh Water To Accomodation In MV. Tanto Nusantara”, Thesis of Engineering Study Program, Diploma IV Program, Merchant Marine Polytechnic of Semarang, Advisor I: H. Rahyono, SP.1,MM M.Mar.E, Advisor II: R.A.J Susilo Hadi Wibowo, S.IP.,M Hydrophore Tank is a pressurized freshwater tank that serves to supply fresh water to accommodation to meet the freshwater needs of the crew. The water in the tank is flowed into a building distribution. The pump works automatically which is regulated by a pressure detector, which closes / opens the switch of the pump motor electric motor. The pump stops working if the tank pressure has reached a specified minimum limit. In this system compressed air will press water into the distribution system and after repeatedly expanding and compressing over time it will decrease, because it dissolves in water or gets carried out of the tank. The tank press system is usually designed so that the air volume of no more than 30% of the tank volume is 70% the volume of the tank containing water. The purpose of this paper is 1) to analyze the abnormalities of hydrophore tank work, 2) to analyze the effects of hydrophore tank abnormalities, 3) efforts made so that the work of hydrophore tanks can be normal again. The research method that I use is the method of fishbone analysis , where fishbone analysis is used to analyze problems, and used to discuss and determine the problem effort. The results obtained from this study indicate that the cause of the normal working hydrophore tank for freshwater supply to the accommodation is that the feed water pump does not work normally, has problems with the impermeability of packing and has problems with the delivery valve. The way to overcome the above problems is to replace the damaged components with new ones and in accordance with the manual book, periodically check and maintain the components and systems of the hydrophore tanks so that the hydrophore tank system can run properly and normally again