39 International Journal of Marine Engineering Innovation and Research, Vol. 4(1), Jun. 2019. 39-46 (pISSN: 2541-5972, eISSN: 2548-1479) Techno-economic Analysis in the Modification of 100 TEUs Container Carrier by Using LNG as Dual Fuel System Agoes Santoso 1 , Beny Cahyono 2 , Edi Jadmiko 3 , Kevin Garsia 4 (Received: 01 August 2018 / Revised: 07 May 2019 / Accepted: 24 June 2019) Abstract⎯Indonesia is no longer known as an oil exporter country but Indonesia has a large deposit of natural gas. This situation will bring the conversion from using fuel oil to gas. It will also support IMO Regulation such as MARPOL 73/78 Annex VI Tier III which was stringent in the regulation to bring the world to achieve near zero emission level. One of the methods to comply with IMO tier III is using gas as a fuel. Therefore, the ship efficiency can be overcome by two aspects simultaneously, cheaper and cleaner gas as marine engine fuel. In this paper, LNG as fuel will be applied to 100 TEUs Container Carrier which is consider several technical aspects when the existing ship is modified so that natural gas can be used safely and well. Things to consider in this LNG re-design are; the volume of tank, bunkering station system, and the Gas Valve Unit (GVU). In addition, this design will also analyze the costs required to modify the vessel so that it can use dual fuel (MDO and LNG) as well as cost comparison when using single fuel (MDO). Keywords⎯ Dual Fuel, Emission, Gas Powered Vessel, LNG, MDO, Tier III IMO I. INTRODUCTION 1 Emission is considered as a serious issue in the maritime sector. International Maritime Organization (IMO) decided to reduce the amount of the pollution generated by ships which is a part of the source of global warming that is getting worse at this moment. IMO control the emission reduction based on the level call as Tier I, Tier II, and Tier III. One of the ways to make the eligible solution for emission reduction according to IMO tier III is by using gas as fuel and the dual fuel implementation is the most applicable to the ship [1]. Dual Fuel means two fuels which one of them is diesel fuel and the other one can be gas fuel like LPG, LNG, and CNG or methane [2],[3] Indonesia is a country that has a large amounts of natural gas deposit [4]. In the one hand, Indonesia is a IMO member that it must implement the tier III in the near future. LNG offers benefits in both technical and economic aspects. The cleaner LNG is cheaper than the diesel oil, either HFO or MDO [5]. Dual fuel engine with LNG has been implemented since 2000 even still as alternative fuel. With the many advantages such as less emission, cutting the operational Agoes Santoso, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, E-mail: agoes295@gmail.com Beny Cahyono, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, E-mail: cak_beny@yahoo.com Edi Jadmiko, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, E-mail: gusjadmiko@gmail.com Tony Bambang Musriyadi, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, E- mail: tobac@its.ac.id Kevin Garsia, S Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, E-mail: kevin.garsia14@its.mhs.ac.id cost, and fast return on investment, then dual fuel engine can be one of the best options in order to make ship comply with IMO tier III. Natural gas is stored in liquid (LNG) conditions and when it is used, the LNG would be evaporated before used by the engine. The reason why LNG is one option to comply with MARPOL is because of the nature of LNG characteristic that have low sulfur content and at the combustion process it may produce lower NOx than fuel oil [6]. This paper is organized as follows. In the second section after the introduction, the explanation of the designed container carrier 100 TEUs will be conducted, including ships modification, bunkering system, and LNG transfer from LNG tanks to main engine [7]. Then, analysis about the difference of operational cost between the use of diesel fuel and dual fuel are carried out in the same main engine power to prove the reason why dual fuel should be considered properly. II. METHOD The first process of this design is getting the general arrangement of Container Carrier 100 TEUs. This could be obtained from certain shipyard which built the ship with these criteria. The general arrangement of 100 TEUs shown in Figure 1 and the data of this ship’s general arrangement is shown in Table 1. One of the methods to modify ships fuel system is by changing the main engine that use diesel fuel only to dual fuel engine that able to use diesel fuel and gas fuel [8]. To comply the new dual fuel engine can be operated normally like the existing engine, and engine propeller matching (EPM) should be done. By using the engine propeller matching methods, then the percentages of clean condition should be over 80% to 90% and rough condition is 100% in order to match the new dual fuel engine usage. The specification of the new engine that comply with this requirement is shown in Table 2.