SNAME San Diego Announces Site For 1980 Spring Meeting
The January meeting of the San Diego Section of The Society of Naval Architects and Marine Engineers was held at the Cafe Del Rey Moro in Balboa Park on January 19, 1977. Following an enjoyable dinner, a short business meeting was held in which it was announced that the proposed site of the Hotel Del Coronado for the 1980 Spring Meeting has been approved by National Headquarters.
David Pritchard, secretarytreasurer of the San Francisco Section, announced that they are hosting the 1977 National Spring Meeting, May 25 through 27, to be held at the Fairmont Hotel, and asked all who could to attend.
Ralph Bradford Jr., Section Papers chairman, introduced the evening's speakers, Thomas J.H.
Glassen and Wesley W. Hickman, both of National Steel and Shipbuilding Company. Their paper is entitled "A Method of Predicting Discharge Time of Cargo and Ballast Systems of Tankers." Mr. Hickman introduced the paper, which discussed the use of a computer program to determine cargo system performance.
The system described was that of a cargo and ballast pumping system, including the tanks and the pumps and all piping to the discharge manifold. The program performs the iterative process for solution of the numerous variables involved to determine the system performance at discrete time intervals.
It was pointed out that the often used method of sizing cargo pumps is to divide the cargo cubic by the desired pump out time. This neglects the required head at this volume rate, friction, rail pressure, and many other items. With this method, even after all calculations and layouts are made, the designer knows that he has a system that will pump a design quantity at a design head, but not much about the total time to empty the ship. The ability to closely predict the discharge time, especially on short runs, is of great value to the owner. The costsaving techniques in moving cargo from A to B, that have been the results of much study in optimizing tanker design, can be quickly offset or partially negated by turnaround time.
Mr. Glassen continued the presentation by discussing the program itself. The program uses the PROSE computer language and after the initial setting up of the problem, which requires significant effort, performs the necessary calculations at set time intervals. The computer assumes a tank flow rate and iterates through the friction losses, pressure, and other constraints to assure all are satisfied, or changes the rates until they are satisfied.
As the tanks empty, the program adjusts discharge rate by reducing pump speed to maintain the NPSHA above the NPSHR, thus maximizing the output. When the pump speed falls below 80 percent, the program begins discharge throttling until the tanks are empty. The output of the program is a time history of the calculated values and tank fluid level. The program once set up can be readily used as a design tool to investigate variations in system parameters and mediums to be discharged.
A lively discussion followed in which additional information on the commercially available PROSE computer language was mentioned and its usefulness in this type of application explained.
Other stories from February 1977 issue
Content
- SNAME Publishes New Vibration Code page: 4
- Request Aid To Build Four LNG Carriers At Cost Of $800 Million page: 6
- Rohr Outlines Plans For Design, Construction And Component Testing Of 3,000-Ton Navy SES page: 7
- John Grimwade Francis Named President Of Asiatic Petroleum Corp. page: 7
- PFEL Requests CDS To Convert Four Vessels At A Cost Of $24 Million page: 7
- Far East-Levingston Delivers Drillship Diamond M Dragon page: 7
- MarAd Approves CDS For APL To Reconstruct Four Containerships page: 7
- Western Gear Receives $3.4-Million Contract From Deepsea Ventures page: 8
- Dravo Corporation Names C.J. Donoghue page: 8
- Earle Pitt Elected Foxboro Board Chairman page: 9
- Chesterton Bulletin Describes New Coating For Marine Maintenance page: 10
- Newport News Signs Letter Of Intent To Build 600,000-DWT Nuclear-Propelled Tankers page: 10
- Calship Receives Loan To Finance Improvements page: 10
- PRMSA Appoints Lugo Executive Director page: 10
- Platner Promoted At Bethlehem Steel Corp. Baltimore Repair Yards page: 12
- Marvin Griffin Joins Matson Navigation Co. page: 13
- Electro-Nav Installs Atlas S-Band Radar On U.S.-Flag Tanker page: 13
- Peterson Receives $33.6-Million Contract For Two Heavy-Lift Ships page: 13
- Free Literature On Fire Extinguishers Available From Kidde page: 13
- SNAME San Diego Announces Site For 1980 Spring Meeting page: 13
- SNAME Philadelphia Section Hears Technical Paper On Pipelay Barge SEMAC I At Past Chairman's Night page: 14
- U.S. Navy Awards Maritime Industries Ltd. $1.7-Million Contract page: 14
- Zapata Bulk Transport Names Skeele President page: 15
- Skagit Corporation Appoints Three page: 15
- Pakistan Nationalizes Entire Merchant Fleet page: 15
- Lemont Shipbuilding Elects Roche President page: 15
- Peterson Launches CF Industries' First Integrated Tug/Barge Unit page: 16
- Texaco Announces Three Appointments In Marine Department page: 18
- Corrosion Engineers Name Bernard Schmidt page: 18
- Halter Marine Launches 180-Foot Supply Vessel For Arthur Levy Boat page: 20
- Petro-Marine Names Easley Project Manager page: 20
- Dravo Corp. Awarded $4 Million To Build Barge Unloader page: 20
- Navy To Procure Five Boeing PHM Hydrofoils Costing $282.1 Million page: 20
- Owens-Corning Booklet Describes New LNG Containment System page: 20
- Kockums Computer System Speeds Decision Making In Ship Accidents page: 21
- Equitable Shipyards Delivers First Of Five Twin-Screw Tugs To Indonesian Government page: 22
- Puerto Rico's First Shipyard Launched With $9-Million Loan page: 23
- Newport News Launches First Commercial Ship In Eight Years—LNG Carrier El Paso Southern page: 24
- SNAME New York Metropolitan Section Holds First 1977 Meeting—Jakobson Honored page: 24
- PFEL Accepts Bethlehem Bid Of $20 Million For Ship Conversion page: 25
- Martin Named President Of Korea Gulf Oil Co. page: 25
- Newport News To Double Capacity For Repairing Commercial Vessels page: 26
- R.A. Baker To Head New Hillman Company page: 26
- Lykes Bros. Elects R. Koch And L. Guerin Corporate Officers page: 27
- General Steamship Corp. Announces Promotions page: 27
- SNAME Publishes Full Computer Analysis Of Shipping Operations page: 27
- Tano Gets Contract For Vessel Control Systems page: 32
- APL Makes Personnel Promotions Worldwide page: 32
- Bethlehem's Sparrows Point Yard Delivers 530,000 DWT In 1976 page: 32
- Hydranautics Trans-Lift Systems Move 12-Story-High LNG Spheres page: 33
- Port Of N.Y. & N.J. Directory Available page: 33
- Jeffboat Lays Keel For 200-Foot Ferryboat To Operate On Mississippi At New Orleans page: 33
- International Paint Enters Commercial Agreement With Nippon Paint Co. page: 33
- Brown & Root Names Executive Committee To Manage Company page: 33
- Roland Kjelland Named Executive Vice President Kaiser Steel Corp. page: 34
- Newport News Shipyard Apprentice School Graduates First Women page: 34
- Agri-Trans Corporation Christens New Towboat— The St. Louis-Built Cooperative Venture page: 35
- Paducah Marine Ways Names Louis J. Roof page: 35
- The Whitehall Club Honors George W. Rogers page: 35
- 630-Foot Hydranautics Portable Pier Erected And Unloading Ships In 66 Hours page: 36
- Oil Mop's Method Of Cleaning Studied By French Delegation page: 36
- Ben Nutter Retires- Port Of Oakland Appoints Abernathy page: 36
- AquaBeam Appoints Arnessen Marine page: 37
- Liberian Shipping Council Elects Liang Chairman, Presses Safety Program page: 37
- Kurz Interests And Moran Shipping Agencies Organize New Agency page: 38
- MarAd Transfers Mitchell To Washington page: 38
- MarAd Publishes Std. Specifications For Diesel Ship Construction page: 39
- Cryogenic Control Valves Offer Economies At Subzero Temperatures page: 40
- R.D. Carter Forms Intermodal Systems Co. page: 40
- PRMSA Names Irizarry Deputy Executive Director page: 40
- Abex/Denison Introduces New Trimline Family Of Hydraulic Pumps page: 41
- Offshore Technology Conference Scheduled For May 2-5 In Houston page: 41
- Alden Data Sheet Lists Marine Weather Chart Transmitting Sites page: 41
- E.M. Hood Reports Shipbuilders Optimistic Over Long-Term Future page: 42
- Marathon Receives Contract For 300-Foot Drilling Tender page: 42
- Seatrain Agencies Names J.W. Honan VP page: 42
- Prudential Lines Appoints Assistant Traffic Managers page: 42
- Astilleros Espanoles Designs Versatile 12,000-DWT Ro/Ro Ship For Multiple Production page: 43
- SNAME Los Angeles Section Told Of Plans For Commercial Development Of The Oceans page: 43
- Maynard Designs Two-Year Expansion Plan For Venezuela Shipyard page: 43
- Cali Furnishing Tacoma NC Lofting Services page: 43
- Graduate Students Present Papers To SNAME New England Section page: 44
- Delta Steamship Lines Names Dale Miller page: 44
- Winthrop A. Wyman Named Executive Vice President Gulf Marine Management page: 44
- Western Shipbuilders Elect Alfred Moloney Association President page: 44
- Gulf Trading & Transportation Promotes W. Stark And J. Allen page: 45
- Velodur Coldwelding Can Cut Costly Repairs page: 45
- Security Bureau Elects W.J. Shields President page: 45
- ICHCA Appoints Finlay New Secretary General page: 46
- Staff Additions And Changes Announced By ACBL page: 47
- Harold Neville Named Chief Design Engineer Portsmouth Naval Yard page: 48
- Saint John Shipbuilding Completes Trials Of 38,000-DWT Tanker M / V Dolores Swann page: 48
- First Of Two New Tugs Joins Wijsmuller Fleet For Servicing North Sea Oil Production Units page: 49
- San Francisco Area Sections Of SNAME And ASNE Told Of Business Problems In Ship Maintenance page: 49
- Spiltrol Harbor Skimmer Delivered page: 49
- Rep. McCloskey And Patterson Address California Chapter Of Kings Point Alumni Assoc. page: 50
- ASARCO Donates Lead For Full-Scale Replica Of Famous Colonial Sloop page: 50
- Equitable Ships First Tug To Indonesia On Louise Lykes page: 51
- International Paint Appoints Two Specialists In Coatings page: 52
- SNAME Pacific Northwest Section Honors Members And Views 'Arctic Sealift Expedition, 1975' page: 52
- MacGregor Describes Cost Saving Hatch Cover page: 52