Technical digest Decision time S
hip operators have not yet realised the pressure on time if their vessels are to comply with Marpol Annex VI by January 2015, according to Germany’s Couple Systems, a manufacturer of dry exhaust gas scrubbers. For the 600 vessels which operate exclusively in the ECA of the Baltic, North Sea and English Channel, there are only about 40 months left in which operators can decide either to adopt abatement technologies, to convert their ships’ engines to burn gas, or just to switch to marine gas oil and face dramatically higher fuel bills. Couple Systems points out that even if only 400 of the ECA-operating fleet undergoes engine conversion or scrubber installation, that is still ten projects a month between now and 2015. Yet almost no orders have yet been placed. Suppliers will inevitably build up their capacity dramatically in the months ahead, but Couple Systems says they will not do so without an adequate orderbook in
Streamlining
apanese owner NYK and shipbuilder Tsuneishi have joined forces to develop a new energy-saving superstructure designed to minimise wind resistance. The MT-COWL has been wind-tunnel tested and shown to reduce resistance by 10%, assuming a wind speed of 17 knots at a sailing speed of 15 knots. If applied to a 180,000dwt Capesize bulk carrier, CO2 emissions would be reduced by around 520 tonnes a year, the companies claim. The MT-COWL cuts resistance by attaching an add- on structure to the facades of the bridge wings and support pillars of a vessel’s superstructure whilst various structural forms have been developed using ‘slanted corner’ configurations. A prototype of the system has been installed on board the Cardinal Victory, a new 180,000dwt Capesize which NYK commissioned at the beginning of July. The results of shipboard tests will be analysed and used for ongoing research and development. In 2008, the two companies developed the MT-FAST, an energy-saving hull appendage fitted just forward of the propeller to catch energy from the swirl flow generated by propeller rotation.
J
BNWAS BW-800 Bridge Navigational Watch
Alarm System hand. ‘In
consequence there will be an intense bottleneck due to the reluctance in the shipping industry to take action,’ the company warns. Scrubbing technology will require tailor-made solutions for the vessels concerned, with individual design, construction and
Emissions challenge ahead
installation taking as much as four to six months per project, Couple Systems predicts. However, abatement technology has various advantages including the face that the basic engine technology remains the same, with engines optimised for efficiency rather than minimum emissions, thereby saving fuel. Bunker availability will not be an issue, Couple Systems maintains, because heavy fuel oil will be in plentiful supply. In contrast, the availabilities of
marine gas oil could become limited, with obvious implications for prices. Dry scrubbing technology requires low maintenance and little energy, the company claims, and system efficiency led to speedy approval by Germanischer Lloyd in April 2010. Meanwhile, there should be no constraints on the supply of granulates to run the system and residues are environmentally neutral and have a value to other industries.
BNWAS BW-800 fl ush mounting
Key features BW-800: • DNV Type Approval • Selector Unit
• Dual motion sensor • Easy to install • Easy to operate
• Maintenance free system • 24 months warranty
• More than 30 agents worldwide • Input for unacknowledged alarms
• More than 1.100 BNWAS systems delivered
Type approved Deadlines for installation:
1 July 2011: New ships > 150 GT and all new passenger ships 1 July 2012: Existing ships > 3.000 GT and all existing passsenger ships 1 July 2013: Existing ships > 500 GT 1 July 2014: Existing ships > 150 GT
Amager Strandvej 124 · DK-2300 Copenhagen S Tel: +45 3286 0525 · Fax: +45 3258 1330
info@unielec.dk ·
www.unielec.dk
Typ 02 - BW-800 - 0,25 - 128x90 - Kormarin+
Marintech.indd 1 2011-06-10 08:16:13 49
Alarm Unit
Motion Sensor
Reset Unit
Selector Unit
Scan this bar code with your smartphone and learn more about BNWAS
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