Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

OFIENGINE: improvements in maintenance and reliability of marine engines

16.04.2008
Aiming to overcome the technical and economic limitations posed by current marine engines, INASMET-Tecnalia has launched the OFIENGINE project, specifically to increase the life cycle of a number of components of the exhaust system and of the engine overall by means of a new coating technology - OFI or Oxy-Fuel Ionisation – using thermal projection. This has been developed by INASMET-Tecnalia over the last four years and is based on a supersonic plasma-assisted combustion process.

It is expected that this technology will be capable of not only generating the coatings technically necessary to combat mechanisms of identified wear, but also of competing with the thermal projection processes in current use as regards cost, reliability and industrial accessibility.

Taking part in the project, set to last three years, is the National Centre for Scientific Research (CNRS) of the University of Limoges in France and Javikan, Arain and Mecanizados Kanter companies from the Basque Country, together with the other European companies, PyroGenesis (Greece) and BPE International Dr. Hornig GmbH (Germany).

Two-stroke diesel engines are recognised to be the most economic and reliable for ocean-going cargo ships. However, the aim of reducing maintenance requirements and enhancing reliability during operation is basic in competitiveness in the marine industry and maritime trading.

The components of this engine subjected to checks in order to increase their useful life are numerous: those of the exhaust gases exit system, the cylinder casing, the piston head, the segments and the piston rod, amongst others. The exhaust system is a substantial part of the cost of the engine given that, under the extreme conditions of corrosion and temperature, advanced high-cost materials have to be employed.

The manufacturing of exhaust valves, for example, requires materials capable of resisting both extreme conditions of erosion and adhesion of corrosive deposits, as well as the high pressures of the system. The most appropriate material for this type of valve is a Nimonic alloy, although for standard valves, steels resistant to high temperatures and with local hardening at the valve seat are still preferred.

The cost of these materials and the need to optimise the checking and maintenance intervals have given rise to developing effective maintenance and reconditioning procedures for valve components.

The usual procedures involve refilling with estelite through welding at the valve seats and the use of ceramometallic coatings applied at the valve axle using a HVOF (High Velocity Oxy-Fuel) thermal projection technique. While these techniques are included in the specifications of many of the most advanced equipment manufacturers and maintenance companies, their more general use in the manufacture of these components is limited technically and financially.

Technological objectives

The practical targets of the project focus on the following technological aims

* Reduce (in the proportion of two or three times) the maintenance requirements for critical components in marine diesel engines:
- Exhaust valves: increasing resistance to corrosion and wear of axles and seats.
- Piston crowns: increasing thermal insulation and resistance to corrosion of the piston crown.
- Piston rings: enhancing behaviour of piston rings during operation by means of the application of multiple-layer coatings.
* Reducing by 50% the cost of the process of coating components.
* Diversifying the technical solutions provided by thermal projection for marine applications by means of increasing the range of materials deposited: from low fusion-point materials, such as alloys of aluminium or copper, to super alloys, carbides and refractory ceramic oxides.
* Designing and developing of new OFI thermal projection equipment and available for marketing.

* Manufacturing diesel engine components using OFI technology.

Irati Kortabitarte | alfa
Further information:
http://www.basqueresearch.com/berria_irakurri.asp?Berri_Kod=1704&hizk=I

More articles from Machine Engineering:

nachricht Scientists from Hannover develop a novel lightweight production process
27.09.2017 | IPH - Institut für Integrierte Produktion Hannover gGmbH

nachricht PRESTO – Highly Dynamic Powerhouses
15.05.2017 | JULABO GmbH

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Salmonella as a tumour medication

HZI researchers developed a bacterial strain that can be used in cancer therapy

Salmonellae are dangerous pathogens that enter the body via contaminated food and can cause severe infections. But these bacteria are also known to target...

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

3rd Symposium on Driving Simulation

23.10.2017 | Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

 
Latest News

Microfluidics probe 'cholesterol' of the oil industry

23.10.2017 | Life Sciences

Gamma rays will reach beyond the limits of light

23.10.2017 | Physics and Astronomy

The end of pneumonia? New vaccine offers hope

23.10.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>