AWS Ocean Energy Testimonial
AWS Ocean Energy a client of 4c Design are based in Inverness, Scotland. They are developing technology for utility scale, offshore wave power generation. Their goal is to deliver practical, affordable, clean energy captured entirely from the sea.
4c Design have been working with AWS since 2009, assisting with the design and development of scale prototypes and mechanical systems that will enable their technology. In this video Simon Grey (CEO) and Tom McKay (Senior Mechanical Engineer) talk about AWS, its technology and their experiences working with 4c Design
In June 2011 AWS announced that French energy giant Alstom was to become a significant shareholder in their company. This is great news for the renewable energy industry in Scotland and also the first time a large energy provider has invested in wave power.
A typical device will comprise an array of 12 cells, each measuring around 16m wide by 8m deep, arranged around a circular structure with overall diameter of 60m. Such a device is capable of producing an average of 2.5MW from a rough sea whilst having a structural steel weight of less than 1300 tonne. The AWS-III will be slack moored in water depths of around 100m using standard mooring spreads. Devices will be arranged in arrays or ‘farms’ of up to several hundred MW total rating. Each AWS-III will be connected to a central offshore substation via a high-voltage umbilical link. The AWS-III is designed for practical operation and maintenance by utility power generators. The large, stable vessel structure provides a safe environment for on-board maintenance of generation equipment and ancillaries whilst our patented system for cell maintenance allows rapid exchange of the flexible wave absorber cells.
AWS do not make wild claims about cost of energy. They do say however that the AWS-III has a power to weight ratio double that of any other offshore wave energy device. It has no exposed moving parts and uses simple, proven power take-off technology and is designed for practical maintenance – key factors for high availability. Device scale means that fixed costs such as moorings and power umbilicals are lower per MW installed. With these features we are confident that AWS-III farms will represent an investable proposition for utilities under the current 5-ROC wave energy tariff for projects in Scottish waters.