Wartsila, Marioff To Cooperate On Emission Control Technolgy
Wartsila and Marioff, agreed earlier this year to cooperate within the area of emission control technologies for reciprocating engines. Marioff is a specialist in creating humidity, while Wartsila needs humidity for reduction of NOx in diesel, and perhaps gas engines.
The introduction of water into the combustion space of a diesel engine in one way or another reduces NOx formation.
There are two main mechanisms for this phenomenon, one being the addition of mass in the combustion space. The other effect may be evaporation of the water in the combustion space during combustion. Both mechanisms are utilized in the Direct Water Injection system, which is one of the technologies promoted by Wartsila.
However, these technologies cannot be used for very low NOx, because the evaporation of the water in the combustion space will steal some of the combustion energy. For the lowest NOx values it is therefore desirable to go another way, and that is to evaporate the water before it enters the combustion space.
Wartsila created such a system in the 1980s called Combustion Air Humidification.
At that time it was not possible to add very much water into the combustion air due to sensitive cylinder liner piston ring technology. Since the introduction of the antipolishing ring diesel engines have been virtually insensitive to humidity in the combustion air, Wartsila decided to take up the development of this system again. Here the Marioff technology to create very small water droplets, HI-FOG, comes in handy because when water is introduced directly after the turbocharger in an environment of more than 200 degrees C and more than 75 m/s air velocity, the small water droplets will evaporate fast.
Other stories from April 2001 issue
- The New Knowledge Brokers? page: 8
- Crowley Launches Refurbishment Of 25 Seagoing Tugs page: 9
- Boat-Park.com — The Virtual Trade Show That Never Sleeps page: 12
- LevelSeas Buys SeaLogistics page: 12
- Proposed Regulations Regarding Source of Income From Activities In Intl. Waters page: 14
- COMSAT Mobile Communications Working With U.S. Coast Guard To Save Lives At Sea page: 18
- ASNE Day 2001 To Feature Timely Technical Papers, Informative Exhibits page: 20
- Adsteam To Buy Howard Smith page: 22
- Bollinger To Construct Pair of Vessels For Seacor Marine page: 24
- Holland America's New Ship Points Toward New Visa page: 25
- Cruise + Ferry 2001 Preview page: 25
- Radiance of the Seas — A First Class Delivery page: 26
- Cruise Lines Equip Fleets With Emergency Smoke Hoods page: 27
- Blount Retires From ACCL; Names Daughter As Successor page: 28
- Help Protect Interiors With SS Sanparrel page: 31
- The FPU Market Is Primed To Produce page: 33
- CWWS Delivers 200 Separators To Tidewater page: 38
- A Leg Up on the Competition page: 40
- Seacor Continues Rational Fleet Expansion page: 44
- GLM Poised For A Strong 2001 page: 46
- Friede Goldman Halter Negotiates $100M Financing page: 48
- Clamp Supplier Dives Into Project page: 49
- Dockwise Performs Timely Delivery Of Shell's Brutus page: 50
- Bollinger Wins K-Sea DH Barge Contract page: 52
- Telenor To Acquire COMSAT page: 52
- First Order For Dolphin Propulsion System page: 54
- Stena Discovery Performance Improved With Enhanced Steering System page: 54
- Voith Adds To Its Innovative Range page: 58
- Wartsila: Smokeless by Common Rail page: 64
- Wartsila, Marioff To Cooperate On Emission Control Technolgy page: 65
- Technology, Image Top Inland Agenda page: 66
- Leading Societies Launch Sweeping Safety Initiatives page: 73
- IZAR Delivers For Stena page: 74
- Furuno's New NavNet Is Compact, Seamless page: 74
- Finland: Cradle of Marine High-Tech page: 75