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www.marinelink.com 45 In 2011 Harvey Gulf International Marine became the fi rst U.S. vessel op- erator to contract for construction of ves- sels by LNG. The fi rst of these vessels to be delivered is the Harvey Energy. In addition to being able to operate on cleaner burning natural gas, the Harvey Energy has “ENVIRO+, Green Pass- port” Certifi cation by the ABS. The re- quirements for this certifi cation include that the vessel be continuously manned with a certifi ed Environmental Offi cer, be completely constructed with certi- fi ed environmentally friendly materi- als and have advanced alarms for fuel tanks and containment systems. Along with the Enviro+, Green Passport nota- tions, these LNG powered OSV’s will be the most environmental friendly OSV’s in the North America. When operating on LNG, the Harvey Energy meets the highest environmental emissions stan- dards, and Harvey Energy will exceed the EPA Tier 4 emission requirements that are to take effect on January 1, 2016. Harvey Energy is diesel-electric and powered by Wärtsilä 6L34DF dual-fuel- diesel gensets. Three of them produce a total of 10,100 bhp. They will power two azimuthing stern drives: Wärtsilä LIPS units producing 3,620 bhp each. The vessel has two bow thrusters: LIPS FT225 M-D units producing 1,717 bhp each. A challenge in designing a boat to run primarily on LNG is onboard LNG storage. Since LNG contains less energy by volume than diesel oil, the LNG tanks have to be signifi cantly larger to give the vessel the same range as with conven- tional diesel. Harvey Energy has a single 100 ft. long cylindrical LNG tank locat- ed along the centerline under the cargo deck just aft of the house. Harvey Gulf selected Gulf Coast Shipyard Group to build the fi rst six of these historic ves- sels. LNG pioneer ABS “ENVIRO+ Green Passport” Harvey Energy MR #12 (42-49).indd 45 11/26/2014 10:35:14 AM
