Yanuariska, Allredo (2017) ANALISA TERJADINYA KAVITASI PADA POMPA SENTRIFUGAL DI GRAVING DOCK PT. PELINDO MARINE SERVICE. Diploma thesis, POLITEKNIK PERKAPALAN NEGERI SURABAYA.
Full text not available from this repository.Abstract
ABSTRAK Graving dock adalah salah satu fasilitas pengedokan yang berbentuk menyerupai kolam dan berlokasikan di tepi laut/pantai. PT. Pelindo Marine Service menggunakan pompa sentrifugal merk EBARA tipe 300 SZ yang berfungsi menghisap fluida yang ada didalam graving dock tersebut. Diperkirakan pompa tersebut mengalami kavitasi karena timbul suara berisik, adanya getaran dan letak pompa yang kurang tepat dan juga karena lamanya kerja/pengoperasian pompa tersebut dalam sehari. Sehingga hal tersebut juga berpengaruh terhadap kinerja pompa. Hal tersebut menjadi kerugian bagi perusahaan karena pompa akan lebih sering mengalami gangguan/kerusakan. Sehingga akan berdampak juga pada biaya operasional yang akan bertambah besar. Untuk menyelesaikan masalah tersebut, penulis akan melakukan perhitungan dimulai dari laju aliran, perhitungan head pompa, perhitungan daya pompa, perhitungan Net Positive Suction Head Available (NPSHA), dan cara menghindari kavitasi pada pompa. Berdasarkan perhitungan didapatkan nilai daya pompa sebesar 5.598 kW, nilai Net Positive Suction Head Available (NPSHA) sebesar 3.308 m dan Net Positive Suction Head Require (NPSHR) yang merupakan ketentuan dari pabrik sebesar 6 m sehingga pompa mengalami kavitasi. Setelah dilakukan pendesainan ulang dengan mengurangi panjang pompa bagian suction sehingga ketinggian pompa menjadi lebih rendah maka nilai Net Positive Suction Head Available (NPSHA) menjadi 6.323 m. dengan kondisi ini pompa bisa terhindar dari kavitasi. Kata kunci : Graving dock, kavitasi, NPSHA, pompa sentrifugal ABSTRACT Graving dockis one of the docking facility and shaped like a pool, location at the seaside /beach. PT. Pelindo Marine Service uses centrifugal pump EBARA brand SZ 300 type which serves to suck the fluid contained in the graving dock. The pump is estimated to experience cavitation because it,s noises, vibration, and the location of the pump is less right and also because of the long-term of work/operation of the pump in a day. So that it would also affect the performance of the pump. It became a loss for the company because the pump will more often have distruption/damage. So that will impact on operational costs have increase. To resolve these problems, the authors will perform calculations starting from the flow rate, the calculation of the pump head, pump power calculation, calculation of Net Positive Suction Head Available (NPSHA), and way to avoid cavitation in pumps. Based on the calculation, the value of the pump power amount 5.598 kW, the value of Net Positive Suction Head Available (NPSHA) amount 3.308 m and Net Positive Suction Head Require (NPSHR) which is a provision of the factory amount 6 m so that the pump run into cavitation. After the redesign to reduce the length of the pump suction section so that the height of the pump is lower, then the value of Net Positive Suction Head Available (NPSHA) get amount 6.323 m. with this condition can avoid pump cavitation. Keywords: Graving dock, cavitation, NPSHA, centrifugal pump
| Item Type: | Thesis (Diploma) |
|---|---|
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Jurusan Teknik Permesinan Kapal > D3 Teknik Permesinan Kapal |
| Depositing User: | Unnamed user with email repository@ppns.ac.id |
| Date Deposited: | 19 Sep 2018 06:39 |
| Last Modified: | 19 Sep 2018 06:39 |
| URI: | http://repository.ppns.ac.id/id/eprint/963 |
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