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All Journal The Indonesian Journal of Naval Architecture Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Ferry M
Department of Maritime Technology, Universiti Malaysia Terengganu,
Civil Engineering, Building, Construction & Architecture Engineering

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COMPARATIVE STUDY OF HYBRID CATAMARAN VERSUS DIESEL MONOHULL BOAT AS FERRY FOR SHORT DISTANCE ROUTES. M, Ferry
The Indonesian Journal of Naval Architecture Vol 1, No 1 (2013): Indonesian Journal of Naval Architecture
Publisher : Diponegoro University

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Abstract

The increasing of fossil’s fuel prices and environmental awareness urges engineers try to hybrid diesel with green energy such as solar energy. Through photovoltaic cells, solar energy is converted into electricity that could power the electric motors as the prime mover at a catamaran that has more slimmer and shallower cross-section area than single hull boat of an equivalent displacement has less draught, more deck area and more stable.. Electric motor maintains high efficiency over a wide range of loads and speeds has a small weight and need low maintenance and repair cost compared to diesel engines or outboard motors. At countries like Malaysia and Indonesia where solar energy is available during average six to seven hours a day is a quite good time range to charge the batteries until reach its full capacity, but when solar radiation is not available the battery charging is taken over by diesel generator. Such hybrid system is efficiently to be used for catamaran boat on rivers, between ports at coastal area and between closed islands due to its less the operational cost, maintenance cost and less carbon emission compare with fully diesel system, hence this is a more environmental friendly system.
STUDY OF CORROSION PERFORMANCE OF ZINC COATED STEEL IN SEAWATER ENVIRONMENT M, Ferry; N.I., Mohd Sukarnoor
The Indonesian Journal of Naval Architecture Vol 1, No 1 (2013): Indonesian Journal of Naval Architecture
Publisher : Diponegoro University

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In this study, the corrosion protective mechanisms of zinc coating for mild steel in seawater were examined using weight  loss,  and  electrochemical impedance  spectroscopy  methods (EIS).  Coating is  a  technique to control the corrosion of a metal by providing an impervious metallic barrier by using sacrificial anode. The samples used in this study were fully zinc coated steel, zinc coated steel with scratch and mild steel as a control. Each sample undergoes the immersion process in seawater for 40 days. The results showed the corrosion rate of fully zinc coated steel decreases with immersion time from 0.03 mm/y to 0.01 mm/y and for zinc coated with scratch, from 0.034 mm/y to 0.012 mm/y. Impedance measurements studies revealed that fully zinc coated steel behave predominantly to be more practical anode in applying a great protection barrier for mild steel
TECHNO-ECONOMIC STUDY OF ALUMINIUM ALLOY AND STEEL AS MATERIALS FOR DECKHOUSES OF OFFSHORE SUPPORT VESSELS M, Ferry
The Indonesian Journal of Naval Architecture Vol 1, No 1 (2013): Indonesian Journal of Naval Architecture
Publisher : Diponegoro University

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Abstract

Aluminium alloy is a relatively more expensive material than steel although its weight is one-third of the steel. Thus the use of steel as a structure adds additional weight by 60%; and when used as deckhouses would raise the GM and scarifying the stability of the offshore support vessel. This paper reviews the merit and demerit of Aluminium alloy and steel focusing on fabrication and assembly, and maintainability cost typical of a 60.0m offshore support vessel operating between Kemaman port and offshore oil rigs in the South China Sea. Mathematical equation was used to calculate the weight of the materials used to construct the deckhouses. Also, net present value and payback period calculations were performed to indicate the economic benefit between the two materials. The initial construction cost for Aluminium and Steel are USD 45506 and USD 6808 respectively involving 23.5 metric ton for Aluminium and 67.0 metric tons for steel. In term of investment, offshore support vessels using Aluminium have shorter payback period of 7.9 years and 8.4 years for steel inclusive of the costs of maintenance and operation. This exercise indicates Aluminium alloy is more economical than steel as construction material for deckhouse of offshore support vessel due to its light weight, lower maintenance and increase earning capacity (more cargo).
Analisis Keberadaan Dan Pengembangan Gardu Induk Distribusi 20 kV Di Kota Pekanbaru M, Ferry; Sukma, Dian Yayan; Ervianto, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Substation as a component of power system plays an important role in the continuity of the supply of electric to consumers that continues to increase each year. If the electrical load is borne by the substation is greater than the capacity of the substation, the substation will experience overload which resulted in the supply of electricity to consumers stalled. These condition must be anticipated as early as possible by PT. PLN (Persero) Pekanbaru CityArea as the provider of electric energy. In this thesis, the author conducted an analysis the existence and development of 20 KV distribution substation in City of Pekanbaru to evaluatethe existing condition which includes loading the transformer and a broad service area on the substation-substation in the city of Pekanbaru then be combined with forecast informationpeak load growth in every district, the density of the total load and peak load in Pekanbaru Resulsts in development of substation Garuda Sakti occured in 2015 with up rating andaddition of 1 unit transformer, in 2016 the development with addition 1 unit transformer, in 2019 the development with made planning construction of new substations. Results indevelopment of substation Teluk Lembu in 2020 with the addition 1 unit transformer and in 2023 made planning construction of new substation. With the construction of the newsubstation will take over most of substation loading on Garuda Sakti and Teluk Lembu.Keywords : Load growth forecast, Transformer, Develoment of substation
Co-Authors Dian Yayan Sukma, Dian Yayan Edy Ervianto Mohd Sukarnoor N.I.