Nugroho, Emilius Wahyu (2018) Optimasi Interval Antar Overhaul Pada Pembangkit Listrik Tenaga Uap Dengan Berbasis Resiko Yang Memperhitungkan Faktor Human Error Dan Profit. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Setiap perusahan pembangkit listrik mempunyai standar interval antar overhaul yang berbeda. Perbedaan tersebut dapat disebabkan karena perbedaan metode yang dipergunakan perusahaan tersebut. Akan tetapi metode-metode tersebut belum memperhitungkan aspek resiko, aspek human error dan aspek finansial secara bersamaan. Tujuan dari penelitian ini adalah menentukan interval overhaul yang optimal dengan mempertimbangkan aspek resiko, aspek human error dan aspek finansial secara bersamaan.
Metode penyusunan model reliability plant yang diusulkan menggunakan tool Criticality Risk Matrix dan eleminasi equipment yang dapat dilaksanakan overhaul pada saat plant dalam kondisi operasi berhasil mereduksi jumlah equipment yang perlu dianalisa, dari 210 menjadi 30 equipment. Parameter reliability plant diperoleh β : 0,9755, η : 602,0508, γ : 7,5942. Model reliability plant dikombinasikan dengan reliability yang dipengaruhi human error sehingga menghasilkan model reliability gabungan. Kombinasi model unreliability gabungan kemudian dikalikan dengan Economical Consequences sehingga dapat diperoleh model Total Cost. Pengurangan model pendapatan netto dan total cost akan menghasilkan model profit, sehingga interval optimal overhaul dapat diketahui dengan melakukan optimasi pada model tersebut.
Optimasi model profit diperoleh top1 : 7698 jam yang menunjukkan waktu dimana plant menghasilkan profit tertinggi. Optimasi model total cost dapat dilakukan untuk mengetahui waktu paling lambat plant harus dishutdown untuk dilakukan overhaul dalam rangka menghindari inefisiensi biaya. Waktu optimal total cost diperoleh top2 : 17645 jam.
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Power plant companies have many different standard interval between overhauls. The difference may be due to the different methods used by the company. However, these methods do not take into account aspects of risk, aspects of human error and financial aspects simultaneously. The purpose of this study is to determine the optimal interval overhaul by considering aspects of risk, human error aspects and financial aspects simultaneously.
The propsed method to calculate reliability plant model using the Criticality Risk Matrix tool and elimination of equipment that can be overhauled at the time the plant under operating conditions, succeeds in reducing the number of equipment that needs to be analyzed, from 210 to 30 equipment. Parameter reliability plant obtained β: 0.9755, η: 602,0508, γ: 7,5942. The reliability plant model is combined with reliability constant affected by human error resulting in a combined reliability model. The combination of combined unreliability model, multiply to Economical Consequences so that the Total Cost model can be obtained. The difference between net income model and total cost will produce profit model, so the optimal overhaul interval can be known by doing optimization on the model.
Profit model optimization obtained top1 = 7698 hours which shown time that plant has maximum profit. Optimization of minimization of total cost model can be done to find out the latest time the plant must be shutdown to do overhaul in order to avoid cost inefficiency. Optimal time total cost obtained top2: 17645 hours.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 621.312 132 Nug o |
| Uncontrolled Keywords: | interval, overhaul, risk, human error, profit |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Emilius Wahyu Nugroho |
| Date Deposited: | 04 Dec 2018 06:52 |
| Last Modified: | 29 Sep 2020 02:43 |
| URI: | http://repository.its.ac.id/id/eprint/59652 |
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