Feature 1 | TANKER TECHNOLOGY
Figure 2: Isometric views of the CDTS and its installation in a ship
pre-loading spray down time with low spray-in mass flow-rate
Furthermore, the CDTS can be constructed
using typical shipyard rolling and forming equipment. While the CDTS offers benefits just from the tank design, construction and installation in the ship, it also offers unique benefits in the design of the ship including a significant reduction in length, providing a significant reduction in the longitudinal bending moment, which results in construction benefits in reduced steel weight and less work content for the same capacity ship compared with any other system. A comparison of tank outlines are shown in Figure 3 for the spherical, spherical
extended, membrane, SPB and CDTS tanks of equal volume. Table 1 shows the capacity benefit of the CDTS over the other containment systems for the same Length Overall (LOA) of 300m and within the new Panama Canal beam restriction of 49m. Te spherical extended tank would enable the LNG Capacity to increase to 180,000m3 within the 300m LOA and 49m beam restrictions. Note that the pure spherical tank LNG Carrier would have a beam of 52m and that the largest total spherical LNG Carrier capacity for the new Panama Canal would be 155,000m3
CDTS LNG Capacity of 210,000m3
compared with the .
Altair ProductDesign provided the structural design expertise and technology
Figure 3: A comparison of outlines for the five containment systems for equal volume
that was used to complete the development of the CDTS design, and enabled the Approval-In-Principle (AIP) from ABS. Altair’s HyperWorks Suite of software
was used to ideate design solutions, and subsequently to analyse and optimise the CDTS tank. Altair’s HyperWorks suite is a computer-aided engineering (CAE) simulation soſtware platform that allows businesses to create superior, market- leading products efficiently and cost effectively. Te HyperWorks platform offers modelling, visualisation as well as ideation, analysis and optimisation solutions. Although the constituent parts of the
CDTS comprise of simple shapes, the overall geometry is structurally complex
24
The Naval Architect March 2016
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
