Abstract: The main goal of the proposed by present invention compliant guyed tower is to increase the depth in which offshore wind turbines can be installed from present limit of 50 meters to 200+ meters. The specifics of compliant guyed towers, which are widely used by offshore oil industry for installation platforms in water depth starting from 300 meters and up to 1,000 meters, is in their long mooring lines, which have springiness that allows to mitigate dynamics of wind and waves forces acting on platforms. The length of mooring lines for wind turbines installed in the relatively shallow waters is not sufficient to have required springiness. By present invention the mooring line are attached to anchors on seabed through a pneumatic hydraulic spring, which provides to the mooring line the needed additional springiness.

Abstract: Installation for harvesting energy of ocean currents (IHOC) in deepwaters is based on utilization of a semisubmersible platform and the multiple of vertically oriented Darrieus type hydraulic turbines. The turbines are located as close as possible to ocean surface, where speed of current is usually at its maximum. Since speed of current fluctuate during the seasons a system controlling buoyancy force of that keeps IHOC floating near surface is employed. The mooring system consists of three tethers, which prevent transferring of overturning moment applied to IHOC to anchoring base. The electric power generators are located in a machinery room on a structure well above sea level and would transmit electric power to the shore utilizing flexible cable. During hurricane it will be lowered to the depth preventing turbines from being affected by wave actions, at the same time it would keep machinery room above wave action.

Abstract: Installations for harvesting energy of river and ocean tidal currents consist of multiple Darrieus type turbines with funnels, which are located inline on the river or ocean bottom and oriented perpendicular to direction of water movement due to tide or river current. Use of Darrieus type turbines with funnels significantly increases efficiency of energy utilization of water streams in comparison versus system not utilizing funnels. Use of greater number of Darrieus turbines operating in line allows to utilize more powerful gearbox and generator, thus improving economics of their operation. For the purpose of simplification the regular maintenance of the system the generator and all auxiliary systems are located above water, except 90-degrees gearbox. To prevent water entering 90-degrees gearbox it always is under air pressure slightly above hydrostatic pressure of water above it.

Abstract: Installation for harvesting kinetic energy of ocean currents in deepwaters is based on utilization of a semisubmersible platform and the multiple of vertically oriented Darrieus type hydraulic turbines with funnels. The turbines are located bellow sea level on distance sufficient to exclude them from being affected by wave actions. The electric power generators are located on a structure above water and transmit electric power to the shore utilizing flexible cable from semisubmersible to the sea bottom and underwater cable going to the shore, where it connected to the power distributing network. One of the Embodiments of this invention is designed to harvest energy of tides in deepwaters.

Abstract: Installation for harvesting kinetic energy of ocean currents in deepwaters is based on utilization of a semisubmersible platform and the multiple of vertically oriented Darrieus type hydraulic turbines with funnels. The turbines are located bellow sea level on distance sufficient to exclude them from being affected by wave actions. The electric power generators are located on a structure above water and transmit electric power to the shore utilizing flexible cable from semisubmersible to the sea bottom and underwater cable going to the shore, where it connected to the power distributing network. One of the Embodiments of this invention is designed to harvest energy of tides in deepwaters.