teekay
project Delivery Milestones: amundsen Spirit Nansen Spirit peary Spirit Scott Spirit
July October april July
2010 2010 2011 2011
››
amundsen shuttle tanker class notations Det Norske Veritas: 1a1, ”tanker for Oil eSp”, CSr, pLuS-2, CSa-2, e0, DYNpOS-autr, rp, Opp-F, ICS, tMON, BOW LOaDING, HeLDk-SH, CCO, Naut-aW, BIS, BWM-e, F-aMC, VCS-2, CLeaN DeSIGN, COMF-V(3)-C(3), Green passport.
teekay haS located its shuttle tanker headquarters in stavanger, just inside the harbour with the company’s classic colin archer-design sailboat moored outside. Tanker Update has been invited to a little round table discussion on Teekay’s new shuttle tanker design, with a special focus on the features intended to reduce emissions in general and Volatile organic compounds (Vocs) in particular. “we work actively with the authorities to establish cross-industry regulations to reduce Voc emissions. we are on the third generation of increasingly better Voc solutions,” says captain Johan ludvig eidem, Teekay’s manager for shuttle, Tendering and projects. also present at our little round table discussion on shuttle tankers and environmental footprints are axel wiedenmann, Teekay’s communications manager, Jan koren, DNV’s Tanker segment Business Director, and eirik Jacobsen, DNV’s District manager for
south Norway. “we have previously installed Voc recovery systems, i.e. process plants, on board 15 of our shuttle tankers to meet the requirements on the Norwegian continental shelf. The first-generation largescale Voc plants were introduced about ten years ago and were quite complicated. They involved investments of around UsD 15–20 million dollars and had to have a dedicated Voc operator on board. we started an internal innovation project with our own team to further develop the Voc reduction performance using existing technologies. an important element here was also to consider the pressure inside the cargo tanks. full-scale tests on board one of our shuttle tankers demonstrated a significant reduction in Voc emissions, in the range of 15–20%, during offshore loading when the vessel was operated with higher tank pressure. In addition, emissions during the voyage were avoided.”
the reSultS of the innovation proJect were reflected in the contract specification for the four amundsen class shuttle tankers with cargo carrying capacity of 121,700 m3, now on order at samsung heavy Industries. The main features for reducing Voc emissions are as follows: n
n
n
the installation of kVoc to reduce Voc production during loading (see separate article in this TU issue) the installation of gBa marine’s patented swirl absorber unit, cVoc, which recycles the tank atmosphere from the top of the cargo tank for absorption into the oil cargo by “mixing” them together during the voyage, see separate figure. the cargo tank design pressure is increased from 0.25 bar overpressure to 0.7 bar, which is higher than the separation stage pressure for most North sea oils.
DNV taNker upDate no. 1 2010 |
9