CSBC-DEME Wind Engineering (CDWE) will be installing eight efficiency PACKs from Orcan Energy on the offshore installation vessel, Green Jade.
The Green Jade will be equipped with a crane with a capacity of 4,000 tonnes and a Dynamic Positioning System and will be used to transport and install foundations and multi-megawatt wind turbines. The ship is currently being built at the Kaohsing shipyard in Taiwan and is scheduled for deployment in 2022.
The four Wärtsilä 46DF engines on board are each equipped with two efficiency PACKs. The efficiency PACKs use the waste heat from the engine cooling water and exhaust gases. A heat exchanger transfers this to the ORC circuit. Here, the refrigerant is evaporated – a non-toxic, non-flammable hydrocarbon – and routed to the expansion machine as superheated vapour. The highly pressurised refrigerant is expanded, thereby driving the rotary screws in the expansion machine. The rotational energy is used to drive a generator that produces electricity. When all engines are running, more than 500 kW of electrical power is generated from waste heat on board the Green Jade.
Hedwig Vanlishout, CEO of CDWE commented: ‘Environmental considerations are an important element of Green Jade’s design. Waste heat recovery is a key technology in this respect, in addition to various other fuel-saving measures on board of the vessel. We chose Orcan Energy because the efficiency PACKs adapt optimally to load fluctuations and also work well at low loads.’
Andreas Sichert, CEO of Orcan Energy, added: ‘Many players around the world are working on making ships more environmentally friendly. The fact that we as a German CleanTech company are now even on board Taiwan’s first offshore installation ship with several of our waste heat recovery solutions and thus part of a huge wind farm project in Asia confirms this trend. The use of excess waste heat is an important and economical component of the decarbonisation of shipping.’
Earlier this month, Orcan Energy also announced that it will supplying waste heat recovery systems to two tankers that are currently being built at Wuhu Shipyard Co. Ltd in China for Swedish operator Donsötank.