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3.2.14. Trearddur Bay The Trearddur Bay is a high-speed catamaran service boat used in the off-shore wind industry. Her relevant specifications were obtained from the literature3637 and given in Table 3.41. The vessel operates out of Newhaven, UK. The route studied was an actual voyage starting and ending in Newhaven and presumably servicing a nearby windfarm, with characteristics shown in Table 3.42. The distance and time were obtained from marinetraffic.com. Calculating average speed resulted in just 6.6 knots. It is very likely rather than travelling at 6.6 knots for the entire trip the vessel went out and back at somewhere near top speed and then loitered at low speed through the wind farm, so the trip was divided into three segments (out-loiter-back) to make the power and energy requirements more realistic. There is a wind farm about 5 nm SW of Newhaven which was used as the service location so the route assumed a total of 10 nm (round trip) at 28 knots (80% MCR) which would take 40 minutes, and a loitering segment of 41 nm over the remaining 7 hours (average 5.9 knots). For these segments the average shaft power and energy used were still obtained using Equation 3.2 and Equation 3.3, respectively. Table 3.41: Estimated specifications of the Trearddur Bay Name Type Overall Length Beam Main Engine Power (MCR) Fuel Capacity Maximum Speed Available Volume Available Mass Trearddur Bay High speed catamaran 20.6 m 7m 1.8 MW 5.3 m3 30 knots 16 m3 9MT 36 “Turbine Transfers Trearddur Bay,” Voith Turbo (no date) 37 “Trearddur Bay – Turbine Transfers” Turbine Transfers Ltd, 2015, Available: http://www.turbinetransfers.co.uk/portfolio/trearddur-bay/ 56PDF Image | Regenerative Fuel Cell
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