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Efficiency Improvement of Workboats through Hull Form Optimization
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2019-03-31
[PDF-1.53 MB]
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Edition:Final Report
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Abstract:Maine Maritime Academy (MMA), sponsored by Maine Center for Coastal Fisheries (MCCF), has developed a high efficiency, advanced hull form for application to the coastal fishing fleet. The design has undergone extensive model testing and exhibits improved performance in the typical cruising speed range of these vessels. Reductions in fuel consumption and emissions are in the range of 15% to 25% depending on loading condition and sea state. The design achieves these reductions using an optimized trimaran hull, allowing for the large required deck space without the large waterline beam and power requirements of current boats. It differs in proportion from larger ship-size designs and works in a different way, achieving low resistance through both wave-drag effects and reduction in wetted surface. While the powering reductions are proven by model testing, much of the small craft and fishing community is not accustomed to relying on these methods. Similarly, though seakeeping and maneuvering tests at model scale suggest good performance, a demonstrator of sufficient size to carry people in real-world conditions is needed to provide sea-trial data and allow fishermen to try the concept first-hand. To that end, MMA applied for and received a grant from the Maine Economic Improvement Fund (MEIF) to continue concept development and construct an approximately 3/5-scale prototype. The 38 ft. concept developed in earlier research projects was scaled and re-designed as needed, resulting in a 22 ft. vessel. Construction started at The Landing School in August of 2017 and ended in October 2018. The vessel will be operated by MMA and will undergo extensive testing and sea-trials.
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