Page 55: of Maritime Reporter Magazine (August 2022)

speed changes. This also eliminates con- cerns with vessel speed limits in certain environments, such as the Great Lakes.

To ensure the design met ABS require- ments, Finite Element modelling of the powertrain was undertaken to evaluate the impact of a shortened shaft line on vibration and shaft alignment, including criteria, such as the engine ? ange shear DSC Dredge, LLC, advances the engineering, automation, manufacturing and quality force bending moment envelope under of cutter suction and underwater pump mining dredges. Customers who place their all operating conditions.

trust in DSC experience bene? ts that go beyond purchasing the right dredge. DSC forges long-term relationships through one-on-one attention to the client’s needs,

EEXI ongoing operations training and timely, knowledgeable parts and service support. The

It is, perhaps, the improvements to the hallmarks of our success revolves around our commitment to Customers, paired with

Energy Ef? ciency Existing Ship Index

Designs, Customization, Quality, Value and Resale worth.

that makes the development a game-

DSC Dredge LLC changer. Essentially, the concept creates 156 Airport Road • Reserve, LA 70084 an entirely new compartment onboard:

Phone: 985-479-1355 • Fax: 985-479-1367 the TSS – a space that has never ex-

Website: www.dscdredge.com • E-Mail: [email protected] isted before. This “revolutionizes the traditional sealed propeller shaft,” said

Hamilton. “The space is designed into virtually all vessels, where an oil-lubri- cated sterntube is traditionally exposed to seawater for cooling. With a seawa- ter-lubricated shaft, the space still exists but it essentially becomes an inspection and maintenance space. Moving the en- gine aftward creates additional cargo space for the same vessel footprint and therefore improves the vessels’ EEXI.”

By removing the sterntube, shifting the engine further aft and shortening the shaft

Walz & Krenzer, Inc. specializes in the design and supply of custom watertight line, the research partners found that Ener- closures, doors, sideports and hatches. Whether your requirements call for manual gy Ef? ciency Existing Ship Index (EEXI), or power operation, high pressure loading, or other special design considerations, a technical ef? ciency regulation that in-

WK offers competitive prices, unparalleled experience, fast and thorough drawing troduces new limitations on the amount submittals, and on-time delivery. We can help solve the most complicated problems!

of CO2 emitted by a vessel per capacity tonne mile, could also be improved.

Contact us at VDOHV#ZNGRRUVFRP or “The new arrangement better sup-

Please visit us at ZZZZNGRRUVFRP ports simpli? ed compliance with envi- ronmental-focused regulations, such as the EEXI and enables more ef? cient use of the engine’s propulsive power, since potential for increased cargo. While the tion should be such that one bearing can the whole RPM range of speeds is avail- decrease in shaft length may not make be removed from the shaftline without able for continuous operation,” said a signi? cant difference to the cargo car- affecting shaft alignment or vibrations

ABS’ Leontopoulos. “It enables own- rying capacity of a containership – be- compliance,” said Leontopoulos. “Only ers to easily consider an Engine Power cause the boxes are of a standard size – water lubricated bearings of this type

Limitation (EPL) if required, to comply a 2.5m (8.2ft) reduction in engine room when combined with the TSS chamber with Carbon Intensity Indicator (CII) space would increase the cargo space and a short shaftline offer these unique power output requirements.” aboard a bulk carrier or tanker. advantages altogether in terms of mainte-

The design interventions also offer

To reap the bene? ts, the length reduc- nance, OPEX and the zero-pollution risk.

www.marinelink.com 55

MR #8 (50-59).indd 55 8/4/2022 9:05:53 AM