Frequently Asked Questions
We’ve tried to provide answers to the issues that Pelamis are frequently asked about here. It may also be that the answer to a question can be found elsewhere on the website: the search bar at the top of the page can locate key words to help with specific queries. The ‘Key Features’ of Pelamis technology are also highlighted below:
Pelamis technology has been designed with survivability in mind.
The Pelamis hides from big waves by diving through them, just like a surfer heading out to sea.
The long, thin, streamlined shape of the machine means forces of drag and slamming are minimised.
Pelamis responds to wave curvature not height.
Since waves naturally get longer as they get higher, this inherently limits the range of motion the machine must move through.
The Pelamis has the highest power capture for a given volume of any type of wave energy machine.
The Pelamis is a ‘line-absorber’, where waves are absorbed by a long structure perpendicular to the wave front. This type of configuration has the highest power capture potential available for a given volume.
The Pelamis is ‘tuneable’ to sea conditions to maximise power capture.
This selective resonant response ensures that power capture is maximised in small waves while remaining minimised in heavy seas.
In developing and manufacturing the Pelamis wave energy converter, we have utilised established and proven technology wherever possible.
The Pelamis is a novel assembly of ‘off the shelf’ proven technology, including elements used in the offshore oil and gas industry, and also in established technology such as construction vehicles and other generation technologies.
This use of existing technology widens the supply chain options and increases component reliability.
Pelamis is firmly of the view that the aggressive offshore environment is incompatible with any requirement for access to the machine while on-site.
For this reason, we believe one of the most important and innovative aspects of the Pelamis technology is our ability to remotely install and remove the machine from its anchoring and electrical systems when required for maintenance or testing.
The Pelamis connection system is cost effective, quick to use, operable in a wide range of weather conditions, and most importantly, significantly safer than other installation techniques.
Pelamis Wave Power uses a modular manufacturing method.
Each Pelamis machine is made up of a number of similar sections, each containing an identical joint assembly and power take off equipment. The high-tech generation systems of each joint can be consolidated into a compact ‘skid’ that can be assembled and factory tested independently and on an open frame before attachment in the main tube section.
This method of manufacture minimises the time that large structural components are required in the assembly area, considerably reducing required factory size and lifting requirements. A further benefit is that the entire commissioning joint power take off system is easier to transport to final assembly sites around the world.
Pelamis technology is considered to have one of the lowest forms of environmental impact on the marine environment.
Being environmentally benign is of high importance to Pelamis Wave Power. We are working with our customers and academic institutes to develop an environmental work programme for wave power technologies.
The appearance of the Pelamis at sea is carefully considered, to maximise safety of passing vessels while minimising aesthetic effects on the seascape.