Carnegie Wave Energy has announced that pipeline works has been completed at its Perth Wave Energy Project in Western Australia.
The installation of the pipelines follows on from the completion of the shore crossing conduit installation in February 2014. The pipeline work package involved the installation of a 400mm diameter high density polyethylene (HDPE) shore crossing conduit which holds the high pressure delivery and return pipes that transmit the high pressure water between the offshore and onshore project sites, and a 110mm HDPE conduit which will hold the communications cable and desalination pipe.
Pipeline installation contractor Total AMS Pty Ltd (TAMS) mobilised to site mid-February. Initial activities involved the pulling of the pipeline through the shore crossing conduit followed by the reeling out of the pipeline to the offshore site. Remaining offshore work is expected to be completed in the coming weeks, allowing for hydrostatic pressure testing and installation of secondary stabilisation.
The Perth Wave Energy Project utilises subsea high pressure pipelines for the transmission of high pressure water. The pressurised water is pumped by the CETO units to the onshore power station and desalination plant, which then returns the low pressure water back offshore to the CETO units to be re-pressurised.
Carnegie placed an order for the manufacture and supply of 6km of flexible steel reinforced pipe and associated end fittings and interconnections in July 2013 with FlexSteel Pipeline Technologies (FlexSteel) based in Houston, Texas. FlexSteel is an experienced piping manufacturer and supplier, with over 20 years’ experience, specialising in flexible steel reinforced pipe for demanding offshore environments. In December 2013, Carnegie announced the award of the pipeline and shore crossing conduit installation contract to Total AMS Pty Ltd (TAMS).
Carnegie Wave Energy Limited is an Australian, ASX-listed (ASX:CWE) wave energy technology developer. Carnegie is the 100% owner and developer of the CETO Wave Energy Technology intellectual property.
The CETO system is different from other wave energy devices as it operates under water where it is safer from large storms and invisible from the shore. Fully submerged buoys are tethered to seabed pump units. These buoys move with the motion of the passing waves and drive the pumps. The pumps pressurise water which is delivered onshore via a subsea pipe.
Onshore, high-pressure water is used to drive hydroelectric turbines, generating zero-emission electricity. The high-pressure water can also be used to supply a reverse osmosis desalination plant, replacing or reducing reliance on greenhouse gas-emitting, electrically-driven pumps usually required for such plants.
The technology is also capable of generating power offshore should the specific characteristics of a project site require it.