LNG

Leading the Way in LNG Vessel Designs

In the past several months, the subject of LNG-powered vessels has become a hot topic for those in the marine industry. As a leader in the field of naval architecture and marine engineering, Jensen is well positioned to serve this emerging market and is also thrilled to announce that it has already begun producing designs for LNG vessels. The most recent come in the form of LNG-powered tugboat, which will be designed to perform harbor ship assist and tanker escort.

100′ x 40′ Tug

Based on the always-popular valor class design. This hardworking vessel will feature a 14-day endurance capability for harbor and escort work and will be outfitted with an innovative LNG package, including two Rolls Royce model US 255 Z-drives, driven by a pair of Bergen C26:33L6P gas engines. The storage tank will also be supplied by Rolls Royce (via Cryomar) and the vessel will be fitted with a hawser winch forward and a capstan aft for line handling.  Accommodations will include a single stateroom on the main deck and three more down below forward. Though the main engines will be gas powered, the diesel generators will still require MDO, so the tugboats will be amply equipped to carry several thousand gallons to support the auxiliaries. 

Final Thoughts: Experience Counts when Considering LNG Vessels

When adding LNG vessels to your fleet, it’s critical to select an experienced and knowledgeable naval architecture and marine engineering firm who can guide you through the process and help you make decisions that will positively impact your bottom line.

Conversion to LNG requires careful consideration and creative solutions in several important areas. For example, designing small LNG vessels is especially challenging because storage becomes an immediate concern. By nature, LNG is approximately 60% greater in volume than the comparable amount of diesel fuel. This means that an LNG vessel will need 16,000 gallons on board as compared to 10,000 gallons of diesel to ensure the same endurance. In addition, because of the special storage requirements for LNG, one cannot place fuel in the wing tanks and double-bottom tanks; rather, LNG must be stored in independent tanks, requiring even more space.

But these are just a couple of examples of the considerations that must be made when switching to LNG vessels. Jensen can provide helpful consultation services to vessel owners considering these types of vessels to ensure that they are designed efficiently, safely and with your satisfaction in mind. Questions or comments? We’d love to hear from you at 206.332.8090.