Wartsila's Vasa 32 Gas Diesel Now Ready For Global Sales
Wartsila Diesel has recently released its new Vasa Gas Diesel (GD) 32 for international sale.
Following Wartsila's traditional marketing philosophy, the company gained experience on the engine by first selling a few pilot installations to selected customers for testing.
The idea is based on the assumption that the diesel process can be used to burn any hydrocarbon if the conditions are right. The conventional diesel process anticipates that the combustible is introduced at the end of the compression stroke, which means in a gas diesel that the gas must be introduced at high pressure.
The advantage of the diesel process for the gas-burning engine is that the same thermal efficiency can be achieved as with an oil-burning diesel engine, resulting in an equal power weight ratio for both types of engines.
Another benefit is that different kinds of fuel can be used. In the case of the Wartsila Vasa 32 GD, heavy fuel, distillate oil or natural gas are useable.
While developing the Vasa 32 GD, Wartsila first had to confirm that achieving an acceptable combustion process with the most common gas, i.e. natural gas, would be possible.
By using experimental injection equipment, the company was able to demonstrate the feasibility of burning gas in both a combustion cell and in a real diesel engine cylinder.
Wartsila next had to design and develop the industrial equipment that would be able to perform in a diesel engine for thousands of hours of operation. The company tested three different types of engines, after having encountered some difficulty in achieving high thermal efficiency over a wide load range, long equipment lifetime, reliable operation and smooth switch-over from fuel to fuel. By using some of their pilot installations, the company was able to perfect the engine's gas injection equipment.
At the point in engine development that a plant with 3 by 18 cylinders approached 98 percent thermal efficiency on a regular basis, Wartsila decided that the Vasa 32 GD was ready for full production.
The key component in the engine is the injection valve, which provides concentric injection of gas and pilot fuel. Gas injection is controlled by a control oil pump driven by the engine camshaft. While it can also be used as the normal lubricating pump, a low pressure oil pump acts as the feed pump to the control oil pump, while the high pressure pump supplies sealing oil to the gas injector.
Wartsila uses an electronic speed regulation system to separate actuators for gas and diesel oil. To ensure that no malfunctions of the gas injection valve lead to engine cylinder over pressure, a quick-closing valve has been fitted. To provide maximum accuracy of the injected amount of pilot fuel at low injection volumes, a special injection pump is provided.
The Wartsila pilot installation with the most running hours had 8000 hours per engine at the time of product release. Experience indicates that the lifetime of the gas nozzle seems to be at least equal to the normal lifetime of a diesel nozzle, an acceptable operational reliability.
Operational testing also showed that the gas-diesel engine produces 50 percent less NO exhaust emissions emissions than a conventional diesel optimized for emission control.
Wartsila claims that it may be possible to lower the Vasa 32 GD's emission levels even more. In light of increasingly stringent international air pollution requirements, this is likely to count significantly in gas-diesel technology's favor.
A solid understanding of how the engine's cylinder and control system react at different loads demanded an extensive series of bomb tests, large text matrixes for nozzle hole configuration, measure- ment and calculation of heat release, mathematical simulation of the combustion as well as simulation of control functions.
The experience gained by Wartsila Diesel from the Vasa 32 GD is considerable and the company is fully prepared to continue the development of gas technology applications.
For free literature regarding Wartsila's Vasa 32 Gas-Diesel engine, Circle 48 on Reader Service Card
Read Wartsila's Vasa 32 Gas Diesel Now Ready For Global Sales in Pdf, Flash or Html5 edition of May 1992 Maritime Reporter
Other stories from May 1992 issue
Content
- New Quality Assurance And Environmental/Safety Directors At IMC page: 4
- White House Promises New Merchant Marine Policy page: 4
- Major Changes Predicted For World Shipping Industry page: 6
- MHI Introduces New Bridge Operation Support System page: 6
- Comsat Develops Lightweight Satellite Battery page: 7
- Underwriters Told To Oppose Foreign Insurance Protectionism page: 7
- Fore River Yard Site Of $ 1.6-Billion Boston Project page: 7
- Overlay Finish For Fiber Ropes Improves Marine Performance page: 8
- MagneTek's PCB Testing Ensures EPA Compliance page: 9
- MagneTek's PCB Testing Ensures EPA Compliance page: 11
- NAVIONICS Introduces New Micro Chart Module page: 13
- Government And Oil Industry Begin Battle Over Oil Spill Assessments page: 13
- Inland Port Opened By Philadelphia page: 15
- IMC Announces New Board Of Directors, Corporate Officers page: 15
- AESA Appoints Gonzalez-Sama General Commercial Manager page: 17
- Ship Repair Revival Plan Outlined By San Francis page: 18
- Service Marine To Build HarrahVHammons Casino Boat For Illinois Operation page: 18
- Schichau Seebeckwerft Launches First Of Two Great White Fleet Reefers page: 19
- Del Norte Introduces Model 2006 GPS Receiver page: 19
- New Report Offers Detailed Study Of World Reefer Shipping page: 20
- R.H. Wager Opens New Mobile Office And Product Lines page: 20
- Double Christening Held For Avondale-Built National Marine Towboats page: 21
- DOUBLE HULL UPDATE page: 23
- New American Underpressure System —An Interim Solution page: 24
- 14 New Generation Double-Skin Tankers Being Built By Fincantieri page: 25
- Double-Hulled 'Patriot' Delivered By Samsung For Conoco Shipping page: 25
- HDW's Design For Double-Hull Tanker To Be European Standard page: 26
- Coast Guard Urges Unified Federal Spill Response Regulations page: 28
- Oil Pollution Act Spurs World Oil Industry To Drop Substandard Tankers page: 28
- Worldwide Tanker Order Book Hits 15-Year High page: 28
- Cruise Ship Zenith Delivered To Chandris Celebrity Cruises By Meyer Werft page: 29
- Diamond M-Odeco Teams With VODL To Enter Floating Production Market page: 29
- Newport News Markets Frigate Design To World page: 29
- Keel Layed For Cruise Ship Maasdam At Fincantieri Shipyard page: 29
- BOOM TIMES FOR KOREAN SHIPBUILDING page: 30
- MTlTs 595 Diesel Series Design Concept Proven Aboard Ferry 'Deutschland' page: 34
- Trinity Marine Awarded $31.2 Million Contract By U.S. Army To Build Two LSVs For Philippines Navy page: 36
- POSIDONIA 92 page: 37
- Tokimec's Marine Systems Division Offers Wide Range Of Navigation Equipment page: 38
- Port Of South Louisiana Plans To Turn Riverplex Into Intermodal Facility page: 39
- North Sea Operators Evaluating New Rig Concept For Long-Term Programs page: 39
- Boat Workers Rally For Luxury Tax Repeal page: 39
- EUROPEAN WORKBOAT SHOW page: 40
- Largest Cruise Liner Ever Built At Finnyards Delivered To Sally Line page: 41
- Bender Inc. Introduces New Portable Ground Fault Current Instrument page: 43
- NEI Syncrolift Receives Three Orders For Shiplifts And Transfer Systems page: 44
- Alden Electronics Introduces New Navtex AE-900 Receiver And Faxmate II Weather Chart Recorder page: 44
- 40th Annual Ft. Schuyler Forum Focuses On Marine Refrigeration And Diesel Engine Performance page: 44
- Glass Beads Demonstrated As Quick, Low-Cost Tool For Oil-Spill Cleanups page: 46
- Cruise Vessels To Be Built In Agreement Between McDermott/Swathtech page: 51
- Amclean Develops Multi-Nozzle Waterjet —Free Video Offered page: 51
- C. Plath Offers Free Color Brochure On Navipilot V page: 52
- New MSI-Operated Rotterdam Research, Training Center page: 52
- Guam Set To Become Key U.S. Military Outpost In Pacific page: 53
- CG Proposes New Rules For Unmanned Tanker Enginerooms page: 53
- Deep-Sea Towage, Salvage And Heavy-Lift Markets page: 54
- The Navy, MarAd, And RRF Deactivations page: 55
- Kranco Develops Automatic Synchronization Of Hoists Controls page: 56
- ABB Set To Get Power Supply System Job For Carnival's 'Imagination' page: 56
- Corps Of Engineers Asked To Fund More Renovations On Inland Waterways page: 57
- CD Based Government Logistics Data Available From USA Info Systems page: 57
- Major Conference On Oil Spill Laws & Response In Seattle, October '92 page: 58
- Open Committee On CG Oil Spill Legislation Completes 1 st Phase page: 58
- RORO 92 page: 60
- McQuay Chiller's QEII Experience Proves Reliability page: 61
- New Study Examines Under-Priced Ship Resale Market page: 62
- Raytheon Announces New Handheld VHF Radiotelephone page: 62
- Siemens To Supply Full Electrical System For New Research Vessel page: 62
- Propulsion System Demonstrator Powered By GE Gas Turbine page: 62
- Portland Box Volumes Up 25 Percent In February page: 62
- Washburn & Doughty Delivers Passenger/Auto Ferry Captain Henry Lee page: 64
- Crowley Maritime Celebrates 100 Years Of Service page: 64
- International Tug & Salvage Expo 1992 page: 66
- Capabilities Of Trinity Marine's New Beaumont Yard Highlighted page: 66
- NRC, Coastal And Phibro To Support Second National Response Network page: 67
- Mende Honored For Accomplishments In Marine Field page: 67
- U.S. NAVY FY 1993 page: 68
- Navy Expects To Award First Contracts From Sealift Fund In Early '93 page: 70
- MarAd Awards Yards Layberthing Contracts Worth $18 Million page: 71
- FY 1993 Budget For Coast Guard Shows Increase Over FY 1992 page: 71
- Appropriations Of $312 Million Requested For MarAd In FY 1993 page: 71
- Intermarine USA Launches Second Navy Minehunter page: 72
- DECK MACHINERY & CARGO-HAN DUNG EQUIPMENT page: 73
- USS Anzio, Ingall's 15th Aegis Cruiser Completed page: 81
- Wartsila's Vasa 32 Gas Diesel Now Ready For Global Sales page: 81
- Nichols Brothers Delivers 1,600-Passenger Dinner Boat For Hawaiian Service page: 83
- ABB Supplies Systems For New Icebreaker Being Built By Finnyards page: 84
- First Commercial Icebreaking Research Ship Delivered By North American page: 84