Toggle Main Menu Toggle Search

Open Access padlockePrints

Engineering Design in Retrofitting LNG Fuel Tanks for Shipping in Combating Exhaust Emissions

Lookup NU author(s): Dr Ivan CK TamORCiD, Dr Arun DevORCiD, Dr ChunWee Ng


Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


There is a significant pressure being placed on the shipping industry, known to be conservative to new technologies, to reduce exhaust emissions. The exhaust emissions from shipping include sulphur oxides (SOx), nitric oxides (NOx) and particulate matters (PM) emissions as well as carbon dioxide (CO2) emission, a greenhouse gas (GHG), which is increasing steadily due to globalization in trade. This study proposes an alternative engineering design in liquefied natural gas (LNG) fuel tank location with rapid retrofitting a typical seagoing vessel. The report also evaluates engineering specifications with cost reduction and minimum downtime set as ultimate objectives. One key aspect of shipowners' considerations in capital expenditure is the payback period of an investment. From the results of this study, the payback period of an LNG retrofit was estimated at 3.5 years against a marine gas oil (MGO) fuelled ship or 4.5 years against a 0.5%S compliant fuelled vessels. This payback period is reasonable and it shows retrofitting vessels with LNG fuelled engine as an attractive option. Several other innovative ideas were considered before this concept design was finally selected with a mini-cape size bulk carrier of 5 to 10 years of age used as a case study. As a result, the successful installation with this rapid retrofitting ships and the use of LNG being a marine fuel will lead to a complete removal of SOx and PM emission. There will be a reduction of NOx emission of up to 85% and a reduction of up to 25% CO2 emission from the shipping industry is made possible.

Publication metadata

Author(s): Tam ICK, Dev AK, Ng CW, Stoytchev I, Deltin L

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: World Engineers Summit 2019

Year of Conference: 2019

Online publication date: 15/11/2019

Acceptance date: 01/08/2019

Publisher: The Institution of Engineers, Singapore


DOI: 10.2139/ssrn.3486748

Notes: Paper posted to SSRN: