Abstract:
This large flexible submarine conduit system (10) for a platform floating at sea includes: a flexible conduit (12) including a plurality of sheets (26A, 26B, 26C) linked together by a sliding closure (28) on each of the lateral sides of the sheets, the conduit (12) including elements for maintaining a circular cross-section of the conduit (12) that are both flexible and flattenable; and a device capable of being placed on the platform at the upper end of the conduit (12), allowing winding and unwinding of each of the sheets (26A, 26B, 26C) of the conduit (12), this device including a drum (14A, 14B, 14C) for each of the sheets (26A, 26B, 26C).
Abstract:
A flexible connection for use between a vertical, large diameter cold water conveying pipe and a floating platform that supports the cold water conveying pipe or another pipe to permit the pipe and the platform to rotate in roll and pitch directions relative to one another without imposing excessive bending moments or strain on the cold water pipe. The flexible connection also contains internal and external pressure across the connection. The flexible connection includes an articulation mechanism that interconnects the vertical cold water conveying pipe and the platform or a pipe on the platform, and a flexible, fluid impermeable bellows.
Abstract:
A cold water pipe assembly, and mechanisms for generating a cold water pipe assembly, are provided. A plurality of mooring lines are secured to a pipe end member. A pipe segment of a plurality of pipe segments is slidably coupled with respect to the mooring lines at a plurality of locations on a pipe wall of the pipe segment. The plurality of pipe segments is iteratively extended to form a pipe assembly of a desired length by joining a next pipe segment to a previous pipe segment to extend the pipe assembly, and lowering the pipe end member and the pipe assembly by extending the mooring lines. At least some of the next pipe segments are slidably coupled with respect to the mooring lines at a plurality of locations on a respective pipe wall of the at least some of the next pipe segments.
Abstract:
A power generator apparatus is disclosed. The apparatus includes a heat absorber configured to absorb heat and provide the absorbed heat to a first heat transferring fluid. The first heat transferring fluid is then circulated to an evaporator. The evaporator is configured to: receive the first heat transferring fluid; facilitate heat exchange between the first heat transferring fluid and a second heat transferring fluid; and return the first heat transferring fluid to the heat absorber. The apparatus further includes a compressor configured to compress the second heat transferring fluid and use the compressed second heat transferring fluid to generate electricity. A heat recovery is used to retrieve heat and liquefy the second heat transferring fluid, and an expansion valve is used to regulate pressure of the second heat transferring fluid received from the heat recovery unit and return the second heat transferring fluid to the evaporator.
Abstract:
A phase-change device for use in a volume of fluid, comprising a pressure vessel; a displacement cylinder; a displacement piston; a drive cylinder containing a phase-change material; a drive piston; and a gas spring. As the device sinks and experiences cooler fluid temperatures, the phase change material reduces in volume, causing the drive cylinder to move relative to the drive piston and thereby exert an outward force on the displacement piston. The displacement piston is pulled away from the displacement cylinder, increasing the overall displacement of the device. The increase in displacement increases the buoyancy of the device, thereby causing the device to rise in the fluid.
Abstract:
An offshore power generation structure comprising a submerged portion having heat exchange sections, power generation sections, a cold water pipe and a cold water pipe connection. The cold water pipe comprises a plurality of offset first and second staved portions.
Abstract:
An Ocean Thermal Energy Conversion (OTEC) system having a turbine with an upstream side and a downstream side. Warm water under a partial vacuum is converted into a vapor, the vapor being supplied to the upstream side of the turbine at a pressure controlled by the temperature of the warm water. A condenser is situated on the down-stream side of the turbine to cause the vapor, after passing through the turbine, to undergo a phase change back to a liquid, which can be used as potable water. The condenser is coupled to a source of a cooling liquid, and the pressure of the vapor on the downstream side of the turbine is determined by the temperature of the cooling liquid. A flexible floating solar collector supplies the warm liquid to the upstream side at a temperature higher than normal ambient temperature.
Abstract:
A combined OTEC and steam system having an OTEC power generation system including a multistage condensing system in fluid communication with a cold water system and a steam system comprising a steam condenser, wherein the steam condenser is in fluid communication with the cold water system.
Abstract:
A system and method for increasing the efficiency of an ocean thermal energy conversion (OTEC) system is described. In some examples, the system collects thermal energy using a solar collector, warms ocean water located within the solar collector, and provides the warmed water to an OTEC system, such as to a vaporizer of a heat engine. In some examples, the OTEC system provides electricity and other energy to another system, creating a cycle of sustainable economic development of energy and resources.
Abstract:
The invention is an ocean thermal energy conversion method and a system in which a motive fluid having predetermined characteristics is circulated in a closed loop between a cold source in cold deep ocean water and heat sources in warm surface water. The motive fluid is compressed between the cold source and a first primary warm water heat source resulting in the motive fluid being substantially totally vaporized at an outlet of the warm water heat source. The motive fluid is heated downstream from the primary heat source by a secondary heat source. The thermal energy of the heated motive fluid is recovered from a turbine and the motive fluid is condensed in the cold source.