The current situation and prospects of ship electric propulsion at home and abroad

Since the end of the last century, the electric motor, especially the electric motor electric electronic drive technology, the electric propulsion of large sea boats is more economical than mechanical propulsion, and electric propulsion has begun to be applied in large sea boats, and it has also been fully rolled out in luxury cruise ships. With the development of pod-type electric propulsion devices, its excellent maneuverability and energy-saving and low-noise advantages have made more and more special ships begin to use electric propulsion, and gradually occupy a dominant position in the application of large cruise ships, icebreakers, offshore oil platforms and seagoing ships. Although this type of ship uses electric propulsion, most of the electricity still comes from traditional internal combustion engines or gas turbines.

The future is also facing the problem of fuel**.

In terms of small and medium-sized ships and water sports boats, the new energy of ships is emerging, especially in some specific waters, countries have issued regulations to prohibit or restrict the operation of fuel ships. At the 2019 Cannes Yachting Festival, there were orders for 65 pure electric yachts, and in the past 2021 there were 600 orders, and today's electric ship industry is very similar to the electric vehicle industry 4-5 years ago. Since the beginning of this year, there have been several electric ship companies in Europe and the United States that have received more than $30 million in financing.

With the accumulation of electric vehicle technology in the field of electric vehicles, ship electrification will usher in a wave of rapid development in the fields of yachts, leisure boats, ferries, short- and medium-distance transport vessels, as well as various operational vessels.

Electric propulsion is currently mostly used in cruise ships.

Law enforcement ships, this kind of ships require good handling performance, and the electric propulsion can rotate 360, so it is very suitable for this kind of ships, and most of the current cargo ships are propelled by traditional main engines. Foreign cruise ships, such as the Queen Mary 2, have four all-electric propulsions. The most famous in China is the law enforcement ship Maritime Surveillance 83, and several semi-submersible ships of COSCO Shipping are also electrically propulsed.

The application prospect is average, mainly because there are more things to maintain than traditional hosts. It is basically not necessary to use it for ships with low maneuverability requirements.

The application of electric propulsion should depend on the conditions and conditions.

For general transport ships, the requirements for maneuverability are not high, the capacity of the power station is not large, and the advantages of using electric propulsion are not prominent.

For trawlers with refrigerated processing, the ship's power grid capacity is large and the tonnage of the fishing vessel is small, and the use of electric propulsion is good, which can improve maneuverability and facilitate operation.

When the icebreaker is working, the load is changing, and even the propeller does not rotate, if the electric propulsion device is used, the working characteristics can be quickly and automatically adjusted, and the suitable cover should be different working loads without damaging the unit.

The dredger adopts electric propulsion device, which has reasonable power distribution, reduces the number of prime mover groups, has good economy, high efficiency and low cost.

Cable laying boats, ship mark work boats, fireboats, etc., use electric propulsion devices to sail at a wide speed.

It is more advantageous for submarines to use electric propulsion devices for underwater operations, and generally use battery-electric motor electric propulsion.

In addition, various underwater measuring devices are also equipped with electric propulsion devices.

Ship electric propulsion is a propulsion method that uses an electric motor to drive a propeller to propel a ship.