Direct Comparison of Waterjets

Press Release
Thursday, March 07, 2013

Two recent refits of waterjets are unique in one respect that they allow a direct comparison between waterjet brands, while everything else remains unchanged.

 

Waterjets from Marine Jet Power were recently used to solve some significant propulsion issues and in one case the exchange even helped a yard to achieve its project goals leading to the fact that the yard finally was able to deliver the ships to the owners.
 

In the first case, the operator of a 10-year-old vessel decided to change to MJP DRB jets due to significant service and corrosion issues on the existing waterjets. The vessels were originally equipped with axial flow jets. MJP DRB mixed flow jets with intakes completely made of GRP were installed in one of the existing hulls with the rest of the equipment, including the engine, remaining unchanged. The GRP gives a smooth and efficient intake shape and eliminates any corrosion issues. The MJP DRB waterjets are otherwise completely made of stainless steel and have thus unmatched strength, resulting in a full five-year warranty, which per se is unique in the marine market.


Sea trial following the refit showed stunning results: Ship speed increased from 38 to 43 knots only thanks to the change of waterjets. The vessel with its original water jets never achieved more than 38 knots – not even when the ship was new. The overall efficiency has increased from 57% to 67%. The difference in efficiency is incredible 18%, meaning that the vessel can obtain an 18% lower fuel consumption. The engines can operate at lower load, giving less wear and longer service life.


Since the operator is very satisfied with both installation and function of the control system, more vessels are now being rebuilt accordingly.


In the second case a yard was in big trouble. Three brand-new vessels could not be delivered due to lack of performance. After long, it was decided to shift out the existing mixed flow jets to MJP DRB mixed flow jets on one of the vessels. Again, it was the MJP DRB jet with GRP intakes that were installed. Interestingly enough, when comparing the two jet systems on paper, they both claimed to deliver the same thrust. In reality, however, the MJP jets consumed 8,5% less power at the same operating speed. Power consumption was measured under the supervision of DNV, guaranteeing the accuracy of the measurements.


Furthermore, the noise level in the aft part of the passenger compartment was also measured. It turned out that the noise level was cut in half following the installation of the MJP DRB jets.


After the exchange of water jets, the yard could finally deliver the ships to the owner, who is now successfully operating the vessels.
 

MJP is said to have removed a big burden from the shipyard, while the operator is now counting on savings of approximately NOK 1.2 Mio per year when operating 3,500 hours annually.

Ivan Fossan, managing director of Norled comments: “Norled is very satisfied that Oma Baatbygeri AS has been able to find the reason why our new vessels didn’t reach the agreed speed. Oma Baatbyggeri builds high-speed vessels with an important comfort-factor and thanks to the MJP waterjets we do not only reach our desired speed, but save a substantial amount of fuel oil at the same time”.


In 2012 MJP Waterjets acquired Ultra Dynamics. The new group is named Marine Jet Power and has offices in Sweden, UK, US, Italy and Singapore as well as sales and service representatives in well over 30 countries. The company group product range comprises MJP CSU, DRB and Ultrajet series.
 

Maritime Reporter August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Cruise Ship Gets Within 298-miles of the N. Pole

Hapag-Lloyd Cruises say that their expedition ship 'Hanseatic' has set a new record for passenger ships in the Northeast Passage, when the 122.8-metre-long ship reached the northernmost point at 85°,

MNZ & AMSA Award McMurdo COSPAS-SARSAT Contract

McMurdo Group’s Techno-Sciences Inc. says it has been chosen by the Australia Maritime Safety Authority (AMSA) and Maritime New Zealand (MNZ) to deploy their next-generation

Panama Canal Infrastructure to be Valued by VRC

Leading provider of independent valuations, Valuation Research Corporation (VRC) says it has been engaged by the Panama Canal Authority to value the locks, dams,

Marine Propulsion

Fuel-saving Modifications for Containerships’ Engines

Mitsui Engineering & Shipbuilding Co., Ltd., and 100% owned subsidiary MES Technoservice Co., Ltd., have received an order from a Taiwan shipowner for fuel-efficiency

MN 100: FloScan Instrument Co., Inc.

3016 NE Blakeley Street Seattle, WA 98105 Telephone: 206 524 6625 / 316 E-mail: joe.dydasco@floscan.com Website: www.floscan.com CEO/President: Chuck Wurster Number

New Bulk Carrier Design Puts Ecoships in the Lotus Position

Ecoships, the technical shipmanagement arm of Newport Shipping Group, has introduced a next generation bulk carrier design, developed to set the standard in ecologically

Shipbuilding

Newbuilding Orders: Summer Lethargy Lingers

Despite some anticipation in increased activity as the summer holidays come to an end, there are just two orders to report this week both focused on the more specialised markets,

Van Oord Orders Subsea Rock Installation Vessel

Van Oord has ordered a new subsea rock installation vessel. Sinopacific Shipbuilding Group Shanghai will build the vessel at its Ningbo yard in China. The vessel will be delivered in 2016.

ClassNK Head Attends KOTC Delivery Ceremony

Noboru Ueda, Chairman and President of ClassNK attended the delivery ceremony for the M/T Al Yarmouk, constructed at Daewoo Shipbuilding & Marine Engineering Co.

Ship Repair & Conversion

Fuel-saving Modifications for Containerships’ Engines

Mitsui Engineering & Shipbuilding Co., Ltd., and 100% owned subsidiary MES Technoservice Co., Ltd., have received an order from a Taiwan shipowner for fuel-efficiency

STS Young Endeavour Prepares for World Voyage

The Royal Australian Navy operated Sail Training Ship, Young Endeavour, is undergoing maintenance work in preparation for a 12-month world circumnavigation. It

Maritime Reporter @ 75: The Daily Cartoon

Maritime Reporter & Engineering News was founded by John J. O'Malley (1905-1980) in 1939, and today ranks as the world's largest audited trade publication in the world serving the maritime industry,

Environmental

30 Rosneft Subsidiaries in All-Russian Environmental Cleanup Day

Thirty Rosneft subsidiaries in most of the regions of the Company presence, from Sakhalin in the east to the Arkhangelsk Region in the west, took part in the

Van Oord Orders Subsea Rock Installation Vessel

Van Oord has ordered a new subsea rock installation vessel. Sinopacific Shipbuilding Group Shanghai will build the vessel at its Ningbo yard in China. The vessel will be delivered in 2016.

Five Port Projects Shortlisted for ESPO Award

Today, the projects of the ports of Huelva, Koper, Lisbon, Marseille and Rotterdam have been shortlisted for the sixth ESPO Award on Societal Integration of Ports.

Fuels & Lubes

MN 100: FloScan Instrument Co., Inc.

3016 NE Blakeley Street Seattle, WA 98105 Telephone: 206 524 6625 / 316 E-mail: joe.dydasco@floscan.com Website: www.floscan.com CEO/President: Chuck Wurster Number

MN 100: Kluber Lubrication North America L.P.

32 Industrial Drive Londonderry, NH 03053 Telephone: 508 404 4807 E-mail: ben.bryant@us.kluber.com Website: www.klubersolutions.com CEO/President: Ralf Kraemer Number

BSEE Conducts Oil Spill Response Equipment Review

Earlier this week, BSEE's Oil Spill Response Division (OSRD) conducted an onsite review of oil spill response equipment listed in DCOR, LLC's Oil Spill Response Plan for platforms offshore Long Beach,

Marine Power

Newport International Boat Show Highlights

Newport Exhibition Group, owners and producers of the Newport International Boat Show, announced today activities and amenities for those planning to attend its 44th boat show season,

Fuel-saving Modifications for Containerships’ Engines

Mitsui Engineering & Shipbuilding Co., Ltd., and 100% owned subsidiary MES Technoservice Co., Ltd., have received an order from a Taiwan shipowner for fuel-efficiency

Vard Orders Parat Electric Steam & Hot Water Boilers

During the last month, PARAT Halvorsen AS has collected four new boiler plant orders from the Vard Group and their multipurpose platform ships of Vard 1 08 design.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Pipelines Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1755 sec (6 req/sec)