Feature 1 | GREEN SHIP TECHNOLOGY Green ships of the future
Almost three years aſter embarking on an environmentally friendly course, the Green Ship of the Future (GSF) project, a Danish maritime industry initiative, has applied its research and technology to more than 100 ships.
O
riginally, the aim of Green Ship of the Future was to demonstrate that it was possible to reduce CO2
emissions from ships by 30%, SOx by 90% and NOx by 90%. Initially, there were four partners, but today there are more than 30 participants with a number of projects targeting three main areas, machinery, propulsion and operations. Te results from the projects were gathered
in two so-called ‘low emission’ studies on an 8000TEU container vessel and a 35,000dwt handysize bulk carrier where the results where accumulated with respect to interdependent interference and compared with an estimate of the extra cost of implementation of the green technologies. An important criterion for the
low-emission studies was the use of available technologies which meant that it was possible to build the ships as specified. Te results from the studies showed that, with the new technologies implemented, it was possible to save 7.2 % in CO2
, 79.1 % of SOx emissions
and 98.6% of NOx pollution on the handysize bulker and 14 % on CO2
, 90 % on SOx and 80
% on NOx on the 8000TEU container vessel without lowering the speed or changing main parameters of the vessels. So Mission accomplished for NOx and SOx, whereas initiatives are still required to meet the 30% CO2
target.
Technically speaking From its beginnings in early 2008 the GSF
initiative has evolved into more than 20 projects. Since the low-emission studies were completed, the initiative has focused on testing and verification of the results, spreading information about the results of the studies through conferences and articles and bringing new partners together. Te strategy has been to let the project
partners market their projects and let the GSF secretariat together with the network partners – mainly Danish maritime associations – arrange conferences and initiate joint publicity regarding the initiative as a whole. Christian Schack, general secretary
and project partner through the aero- and hydrodynamic consultancy FORCE Technology, explains: “The Green Ship initiative has a technical focus in demonstrating what can practically be done to make ships greener. Terefore, the GSF resources are directed towards supporting the continuous development of the projects as well as trying to attract new relevant projects. As the outcome of the individual projects need to be economically feasible in order to compete with less energy-efficient solutions, the project partners handle the process of communicating the results of their own projects.” An example of the latter is the newly
released article from Maersk and MAN Diesel addressing their findings within dual/multi certification with regards to lowering ship
speeds. Another is the pump manufacturer DESMI which offers an Energy Check on the basis of the results of their projects.
The future of Green Ship Besides the more extrovert activities, development and innovations have been carried out within the GSF projects. Mr Schack explains: “We have received very positive feedback on our low-emission studies, so we have decided to continue these studies on other ship types. They have proved to be real innovation enablers. In the coming period, we are continuing our effort of bringing companies from all levels of the maritime industry together in cross-disciplinary projects. In 2011 this will be done through two different new studies, where the first is a comparative study regarding the 2015-regulations concerning low sulphur fuel oil within the Emission Control Areas (ECA), the other is an interesting ferry study.”
Investigating SOx
abatement technologies Te International Maritime Organization’s decision to reduce the sulphur level in fuel oil to 0.1% by 2015 or clean the exhaust gas to an equivalent level holds an interesting challenge regarding retrofitting of ships sailing in the ECA. GSF has formed a new project where a
group of companies will work together on comparing various abatement technologies
An illustration of the aerodynamically optimised Seahorse 35 bulk carrier, this version shows how an optimised ship may look in the future.
38
The Naval Architect January 2011
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72