Page 20: of Maritime Reporter Magazine (February 15, 1980)

Chesapeake Section SNAME

Hears Ocean Energy Systems Paper

Authors William W. Rogalski and Eric A. Midboe, both of Gibbs & Cox, Inc., Wilbur G. Sherwood,

National Science Foundation, and

Feat Szeto, National Oceanic At- mospheric Administration, pre- sented a paper titled "The State of the Art in Alternate Ocean

Energy Systems" at the Decem- ber meeting of the Chesapeake

Section of The Society of Naval

Architects and Marine Engineers.

In his presentation, Mr. Rogal- ski provided an overview of a va- riety of wave and current energy conversion systems. Wave energy extraction systems included heav- ing/pitching/rolling, Mazuda (cav- ity resonator), wave focusing, pressure actuated, and rotating devices, while the current energy extraction devices covered rotary (axial and radial flow) and linear types. In delineating design and evaluation criteria for these sys- tems, the author pointed out clearly that although it is rela-

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ENGINEERING NEWS 107 EAST 31st STREET

NEW YORK, N.Y. 10016 (212) 689-3266 basis, a cost-effective system can be developed.

Subsequent discussions were presented by Dr. Michael McCor- mick, U.S. Naval Academy; Dr.

Theodore Lee, University of Ha- waii; and Ken McDonald, Evans-

Hamilton, Inc. tively simple to extract wave or current energy, many problems are encountered in converting this energy into useful or usable forms.

Coupled with the problem of cost effectiveness, design criteria (op- erability, maintainability, envi- ronmental impact, etc), and de- ployment of necessarily large structures, the overall complexity of wave and current energy con- version presents a formidable challenge to the ocean engineer- ing community. However, similar challenges relating to floating platforms, mooring systems, etc., have been overcome by the adap- tation of a complete system opti- mization concept.

Mr. Rogalski concluded his pres- entation by offering a brighter picture of the difficulties associ- ated with these energy conver- sion systems. By treating the energy resource, the conversion method, the potential market, and the environment on an integrated Pictured at the recent SNAME Chesapeake Section meeting are, left to right: William

W. Rogalski Jr., Gibbs & Cox, Inc., author; Eric A. Midboe (seated) Gibbs & Cox,

Inc., author; Lloyd Lewis, Ocean Systems Branch, DOE, moderator; Feat Szeto,

NOAA, author; Wilbur G. Sherwood, National Science Foundation, author; Robert

Scott, Gibbs & Cox, Inc., secretary treasurer, Chesapeake Section, and James

A. Lisnyk, Maritime Administration, chairman, Chesapeake Section.

Marine Electronics

Brochure Available From

Frank L. Beier Radio

A six-page brochure, available from Frank L. Beier Radio, Inc.,

New Orleans, La., details the com- pany's expanding capabilities for system consultation, custom engi- neering, installation and service of marine navigational aids, com- munications equipment, and spe- cial marine electronics. Included are descriptions of Beier Radio's services, the products it handles, and information on the company's nine strategically located service points along the Gulf Coast. The brochure is available free of charge to those requesting one on company letterhead. Address requests for a free copy to Carl

Beier, Frank L. Beier Radio, Inc., 811 South Causeway Boulevard,

New Orleans, La. 70121.

Bird-Johnson Bow

Thrusters Added To 3 Ships Building At Sun

The Maritime Subsidy Board has approved the payment of con- struction differential subsidy (CDS) for the installation of

Bird-Johnson bow thrusters on three roll-on/roll-off container vessels being built for Waterman

Steamship Corporation under the

CDS program at Sun Shipbuild- ing and Dry Dock Co., Chester,

Pa.

The board said the change will not affect the delivery dates of the vessels, all expected to be in 1981.

FIFTY AND COUNTING AT DRAVO — The 50th Viking-class tow- boat built by Dravo Corporation's Engineering Works Division slides down the ways and into the Ohio River at the company's Neville

Island shipyard near Pittsburgh, Pa. Powered by two General Motors

EMD 2,800-hp diesels, the 5,600-hp boat Carl H is owned by Ameri- can Financial Corporation of Cincinnati, home port for the vessel.

In addition to towboats, Dravo designs, engineers and constructs dry cargo, coal, tank and special-purpose barges, as well as marine acces- sories. Last year, the company produced a record 355 hulls. 56 ZIDELL Maritime Reporter/Engineering News