Evaluating LNG As a Fuel for Diesel Shrimp Boats

by George H. Acker, Jr., Univ of Alabama, Tuscaloosa, AL, USA,
Walter J. Schaetzle, Univ of Alabama, Tuscaloosa, AL, USA,
C. Everett Brett, Univ of Alabama, Tuscaloosa, AL, USA,
Yeong K. Song, Univ of Alabama, Tuscaloosa, AL, USA,

Document Type: Proceeding Paper

Part of: Coastal Zone '87


Liquefied Natural Gas (LNG) is being evaluated as a viable fuel for diesel engines. A shrimp boat is being used to evaluate the LNG system. LNG has an economic advantage to diesel fuel; it is cleaner burning, cryogenic storage ( minus 163 degree C) allows use of the fuel as a heat sink for on-board refrigeration, and the base cost is lower. The design considerations emphasized for the system are cost, long-term reliability, safety, and environmental cleanliness. Laboratory testing of the shrimp boat engines has proven the feasibility of operating the diesel engine on natural gas. The main engine, a Caterpillar 3406-B, and a Perkins 4. 236 generator will operate with 85% natural gas (based on specific heat rate, kJ/kW-hr) at full load. The diesel engine operates as efficiently or better on dual-fuel (natural gas with diesel pilot ignition). Parameters are noted that produce efficient operation and long life.

Subject Headings: Natural gas | Small craft | Energy storage | Energy consumption | Laboratory tests | Engines | Fish management | Renewable energy | Georgia | United States

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