Innovative solutions for variable buoyancy control of vessel and floating units.

MRPC specializes in development, manufacturing, installation and maintenance of variable buoyancy control solutions.

Break - through for MRPC!

Recently MRPC signed a contract with Vard for delivery of an advanced Roll damping system for a new krill vessel. Final client is Aker BioMarine.
The vessel has a length of 130m and shall operate in Antarctic waters. Read more...

Pioneering service vessel contract.

MRPC is proud to announce a contract with Salthammar Båtbyggeri AS regarding delivery of variable vessel buoyancy and anti–heeling product to build number 142, a CoastCat 25 design by Tomra Engineering AS.

A2Sea variable vessel buoyancy contract.

MRPC has provided variable vessel buoyancy solutions for 4 Catamaran Swath vessels, all currently operated as wind turbine service vessels by A2Sea. The system is based on technology provided by MRPC, and replaces traditional ballast systems. The vessels are built in Denmark for Odfjell Wind AS.

Fishing for Røkke in Argentina.

When the 130 meter long krill ship for Kjell Inge Røkke  is delivered to Aker BioMarine from Vard to the next years, it is Sporsheim's patent that will ensure that the boat is stable, even in heavy seas Antarctica.

Innovator Award

Ove Sporsheim and MRPC Receive Innovator award (2013) for good entrepreneurship. Award issued by NTNU (Norwegian University of Science and Technology)

Solution for maintenance of offshore wind turbines.

AXTech & MRPC in Molde have won one Statoil competition with proposed solution for heavy maintenance of offshore wind turbines. Equipment of 150 tons must be able to be lifted 150 meters above sea level.

MRPC Solutions

Patented SolutionS
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Patented
MRPC

Variable vessel buoyancy

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MRPC

Anti-heeling system

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MRPC

Passive Stabilization

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MRPC

active stabilization

Variable vessel buoyancy

Patented Solution

Traditional water ballast system is based on closed tank philosophy, using ballast pumps and ballast lines for filling and discharging, as well as displacement of water ballast between tanks.

innovative solution

Our innovative solution replaces traditional water ballast systems.

Tanks open to sea

Tanks open to sea and the utilization of energy available in air pressure and vacuum, ensure a much more effective water ballast handling. Variable vessel buoyancy provides various opportunities for the customer according to specific operation demands.

one step ahead

Innovative solutions give our customers the advantage of being one step ahead of their competitors.

certified and approved

The system is certified and approved, and our professional suppliers of equipment and components are some of the most competent and experienced on the market.

Content variable vessel buoyancy

equilibrium during operations

Our innovative system replaces traditional anti–heeling systems, ensuring equilibrium during operations with no need for fluid transfer between tanks.

high efficiency and highly reliable

The solution ensures high efficiency and highly reliable safety standard during operations.

full redundancy

The anti–heeling system is based on full redundancy policy.

function of the variable vessel buoyancy

Our anti–heeling system is a function of the variable vessel buoyancy product, using the same dedicated tanks to achieve equilibrium.

Anti-heeling System

Patented Solution

In a traditional anti–heeling system, fluids are transferred between dedicated tanks to keep the vessel or floating unit on an even keel.

Content anti-heeling

Passive Stabilization

Patented Solution

Traditional water ballast system is based on closed tank philosophy, using ballast pumps and ballast lines for filling and discharging, as well as displacement of water ballast between tanks.

innovative solution

Our innovative solution replaces traditional water ballast systems.

Tanks open to sea

Tanks open to sea and the utilization of energy available in air pressure and vacuum, ensure a much more effective water ballast handling. Variable vessel buoyancy provides various opportunities for the customer according to specific operation demands.

one step ahead

Innovative solutions give our customers the advantage of being one step ahead of their competitors.

certified and approved

The system is certified and approved, and our professional suppliers of equipment and components are some of the most competent and experienced on the market.

Content passive stabilization

air compressors

Air compressors directly connected to designated tanks regulate the volume of seawater inside the tanks, by creating overpressure or vacuum.

optimal operation

The Active stabilization controller provides optimal filling in these tanks based on input from the ship´s movements. Top valves make sure overpressure or vacuum is controlled when filling or discharge has reached a specified level according to the active stabilization controller.

full redundancy and highly energy effeective

Our active stabilization system is developed according to full redundancy policy. The solution is effective in all weather conditions, and is highly energy effective.

certified and approved

The system is certified and approved by flag state and class.

Active Stabilization

Patented Solution

Our innovative active stabilization solution is based on ballast water tanks open to sea in vertical direction, stretching above and below water baseline.

Content active stabilization

Technology

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Technical summary
full redundancy and highly energy effeective

The solution is based on open tanks to sea, stretching above water baseline, utilizing over and under pressure to work counter phased towards waves.
The innovative solution provides significantly increased speed during water level adjustment inside tanks.
Due to its design, the system is energy efficient.

Patent
The solution is patented in USA, Russia. Brazil, China, India, Korea and Norway and patent is pending in other areas and countries.

The solution is based on open tanks to sea, stretching above water baseline, utilizing over and under pressure to work counter phased towards waves.
The innovative solution provides significantly increased speed during water level adjustment inside tanks.
Due to its design, the system is energy efficient.

USA: 8,479,674 – Accepted
Norway: 20076308 – Accepted
Russia: 2010122729 – Accepted
Brazil: 0821169-8 – Accepted

China: 200880123976.0 – Accepted
India: 2035/KOLNP2010 – Accepted
Korea: 10-2010-7014925 – Accepted
EPO: 08858077.4. – Accepted

Verification
of passive and active stabilization mode

Simulation models at Ålesund University College have verified the solution. Calculations concluded a theoretical damping potential of 96%.

Further, a ship model trial, with weight displacement at 15.150 t, was performed at Stadt Towing Tank.

The trial included testing of roll and pitch, both active and controlled passive.
The damping effect results are stated below.

- Active Roll: 79.8%
- Active Pitch: 44.4%
- Controlled passive damping has shown effect up to 36.9%

Content technology

Technical description
solution

The solution is based on open ballast tanks to sea in vertical direction, stretching over the sea water level, utilizing negative and positive pressure to work counter- phased towards waves.
High volume air compressors, working with low pressure and vacuum, manage volume in designated tanks. The active stabilization controller provides optimal filling in these tanks based on input from the ship´s movements.

Functional description
solution

The center level and volume in the tanks are at the variation sea water level. This is to enable the system to “catch” the waves and work with nature´s forces.“
Catching” the waves makes the filling process of the tanks possible without any power consumption. If more filling or load in the tanks is needed, this is added through the suction side of the compressors.
The compressors, working at high volume of air, but with low pressure and vacuum, require low power consumption.

USA: 8,479,674 – Accepted
Norway: 20076308 – Accepted
Russia: 2010122729 – Accepted
Brazil: 0821169-8 – Accepted

China: 200880123976.0 – Accepted
India: 2035/KOLNP2010 – Accepted
Korea: 10-2010-7014925 – Accepted
EPO: 08858077.4. – Accepted

Application
increase operational time

All vessels and floating units focusing on keeping movement to a minimum will benefit from our stabilization system and solutions. They will increase operation time and reduce down time caused by weather/environmental conditions.
The solution can be implemented in all new constructions, and in most cases in existing ships.

Model verification
simulation

During a model test at Stadt Towing Tank, using a Ramform model vessel as a test bed for the system, all simulation models were verified.

The model was fitted with transparent ballast tanks, valves and sensors necessary to implement the control system. Marine Innovation did the implementation of the control system
.
The model test conclusion stated that the stabilization principle reduces roll and pitch values significantly.

The reduction depends on available volume in ballast tanks. Highest reduction is obtained with the active system by using positive and negative pressure to control ballast tank filling.

The passive system has also been proved to reduce the movements of the vessel significantly.

Content technology

About MRPC

Founded

In 2008 as an incubator company within Molde Kunnskapspark's.
The company is located in Molde on the northwest coast of Norway. This is one of the largest marine and offshore engineering clusters in Norway.

owners

Ove Sporsheim, founder and CEO of the company
Kjell Ødegård, founder and co-owner of AXTech AS
Richard Myhre, founder and co-owner of AXTech AS
Molde Kunnskapspark - a regional business development company
Eirik Bergsvik
Eskil Hansen

Board

Richard Myhre, CEO AXTech AS
Eirik Bergsvik, CEO Interwell AS
Ove Sporsheim, CEO Marine Roll & Pitch Control AS
Finn Amundsen, CEO Molde Kunnskapspark AS

CONTACT

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