Sunday, July 21, 2019
Maritime Propulsion

Posted by July 1, 2019

WE Tech Equips Donsötank’s New Builds

Photo courtesy of WE Tech Solutions

WE Tech Solutions, a leading energy efficiency solution provider, has received an order to supply an integrated package, including Propulsion Drives, Permanent Magnet Shaft Generator, Shore Connection Switchgear, Bow Thruster Motor and DC Link to two new 22000 DWT tankers for chemical and oil products with an option for another two

The tankers are built by Wuhu Shipyard Co. Ltd for the Swedish ship owner Rederi AB Donsötank. WE Tech’s equipment delivery to Wuhu Shipyard will commence in April 2020.

WE Tech’s solution is based on variable frequency drive technology (WE Drive) and the Permanent Magnet Shaft Generator /Motor. The solution allows the main engine to run at variable speed and the propulsion machinery can be operated at optimal duty points at all vessel speeds while the electrical network is generated by the Shaft Generator. Therefore, there is no need to run the auxiliary engines and generators when sailing. This creates tons of fuel savings and reduces operational and maintenance costs. In case the Main Engine is out of operation or requires additional boost in demanding situations, the solution uses the Shaft Generator as motor – a reliable and cost-effective Auxiliary Propulsion Drive to ensure the vessels’ safe return to port.

This solution also brings an efficient method to distribute power to bow thrusters and cargo handling system of the tankers. The method is to connect these large electrical consumers’ inverter units to the common DC link of WE Drive. Furthermore, when the tankers are in the harbor, the solution allows the use of cleaner shore power. Any available voltage and frequency are conditioned by the WE Drive to ensure the tankers’ electrical system is unaffected by various national power grids. Connecting tankers to the port electricity grid also allows the engines to be turned off, which reduce emissions in harbor and create major savings. This versatile and flexible solution will save tons of fuel and reduce emissions both at sea and harbor environment.