This tug will be no joke – full size, 70-ton bollard pull and a few MWh of batteries.
Most of the electrification efforts are currently put into cars, but there is a huge appetite to electrify ships too.
Ports of Auckland in New Zealand since 2016 has been working on the idea of an electric tug. As there were no such products on the market, Dutch company Damen Shipyards decided to develop a full-size, 70-tonne bollard pull, electric tug. The first such unit, called Damen RSD-E Tug 2513, will be delivered to Ports of Auckland in 2021.
To meet the performance of the port’s strongest diesel tug Hauraki, also built by Damen, the RSD-E Tug 2513 will need a few MWh of batteries. It will be able to do 3-4 operations (usually in 3-4 hours) and then recharge over of a period of two hours.
Tony Gibson, CEO of Ports of Auckland said:
“It was important to us that a new electric tug should be able to carry out normal port operations, just like our existing diesel tugs. Our new e-tug will be able to do three to four shipping moves on a full charge, or around three to four hours work (one shipping move takes an hour on average). A fast charge will take about two hours. This is just what we need.”
Ports of Auckland intends to be totally zero-emission by 2040 and the electric tug is just a first step.
Besides developing a proper electric tug, another obstacle is financing it. The price is around two times higher than diesel counterparts. On the other hand, huge savings are expected over 25 years of operation (this is likely the time period in which battery replacements will be required).
Auckland Mayor Phil Goff said:
“The life of the tug is around 25 years. By going electric now, we save 25 years of diesel pollution and a net reduction in costs of around $2.5 million because it is so much cheaper to operate.”
Tony Gibson, CEO of Ports of Auckland explains:
“One of the other hurdles we had to get over was cost. The purchase price of this tug is significant, at roughly double that of a diesel tug, and that is an important consideration for a business that needs to make a profit. However, we are prepared to wear that up-front cost because our commitment to reduce emissions has to be more than just words.
Fortunately, the cost of operating an electric tug is less than a third of the cost of running a diesel tug. So while we pay more up front, over the life of the tug we’ll save around $12 million in operating costs, making our electric tug cheaper in the long term,”
See also: Damen RSD Tug 2513 (diesel) specs card.
Source: Ports of Auckland via Green Car Congress
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