Johan Hjort (ship)
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The Johan Hjort is a research vessel for the Norwegian Havforskningsinstituttet.
history
The ship was built by Flekkefjord Slipp & Maskinfabrikk under hull number 146. The keel was laid on October 14, 1989, the launch on April 21, 1990. The ship was completed on November 17, 1990.
The ship is named after the Norwegian marine biologist Johan Hjort , first director of the Havforskningsinstituttet and one of the founders of the International Council for the Exploration of the Sea .
It is primarily used for fisheries and environmental research in Norwegian coastal waters and Norway's exclusive economic zone .
Technical data and equipment
The ship was originally powered by a diesel engine from the manufacturer Wichmann (type: 8V28B) with an output of 2400 kW . Two diesel generator sets were available for the power supply, each driven by a Cummins diesel engine (type: KTA 19 G). Furthermore, an emergency generator from Cummins was installed (type: 4BT 3.9G2).
In the winter of 2016/2017, the ship's propulsion system at the Båtbygg AS shipyard in Raudeberg was replaced by a hybrid drive . The main engine was replaced by a Caterpillar diesel engine (type: C280-6) with 1900 kW output. The drive motor acts on a variable-pitch propeller via a reduction gear and drives a shaft generator via a power take- off. This can also be used as an emergency drive if the main engine fails. The configuration allows the drive in a diesel-electric mode using the generators and the main engine switched off. This leads to significantly less underwater noise during operation. The motors for driving the generators were also replaced by Caterpillar diesel motors (type: 3512C). The emergency generator powered by a Cummins engine was retained. The engines are equipped with SCR catalytic converters and an exhaust gas washer for exhaust gas aftertreatment .
In addition, lithium-ion batteries with 292 kWh were installed, which store excess energy and can release it again if necessary. This can save about 5 to 10 percent fuel. The ship is equipped with a bow and a stern thruster as well as an additional bow thruster designed as a water jet propulsion system.
The ship can be used as a stern trawler for fisheries research . It is provided with a rear lift . It is equipped with various devices for taking samples and for using a CTD rosette . In 1995 the ship was retrofitted with an extendable instrument holder for echo sounder and sonar . Various lifting tools are available on board. The ship is equipped with a stern boom . This can lift 10 t. A 316 m² working deck is available in the aft area.
24 single and five double cabins are available for the crew and scientists.
The hull of the ship is reinforced with ice ( ice class 1C).
Individual evidence
- ↑ a b c d e Johan Hjort , Havforskningsinstituttet. Retrieved July 22, 2020.
- ↑ «Dr. Fridtjof Nansen »ombygget ved Baatbygg AS , Norske Skipsverft. Retrieved July 22, 2020.
- ↑ a b J. Ytreland: Johan Hjort - Renewal of propulsion and integration of Hybrid battery power system , Havforskningsinstituttet (PDF, 948 kB). Retrieved July 22, 2020.
- ↑ Minutes of 29th International Research Ship Operators Meeting held October 10–13, 2016 at the National Research Council (CNR) , International Research Ship Operators (PDF, 602 kB). Retrieved July 22, 2020.
- ↑ a b Johan Hjort conversion project , Baatbygg (PDF, 831 kB). Retrieved July 22, 2020.
- ^ Johan Hjort - Hybrid research vessel with the ability for quiet, energy-efficient operation , Corvus Energy. Retrieved July 22, 2020.
- ↑ Next Generation European Research Vessels , European Marine Board IVZW Position Paper 25, October 2019, p. 33, ISBN 978-94-92043-79-5 (PDF, 5.9 MB). Retrieved July 22, 2020.