An underground hydraulic system is disclosed, the system comprising an intake tunnel (2) connected to a body of water (1), a control unit (3) arranged to control flow of water from the body of water (1) into the intake tunnel (2), a distribution tunnel (5) connected to the intake tunnel (2), and at least one riser tunnel (6) connected at a lower end to the distribution tunnel (5), and arranged for receiving water from the distribution tunnel (5).

A subterranean geothermal power generation system is disclosed herein, comprising a closed cavity, a temperature differential mechanical power generation device, an electric power generation device and a heat conduction module. The mechanical power generation device with a heat source end and a cold source end and the electric power generation device are integrated into the cavity. The heat source end is exposed from the cavity for contacting with a heat source in the well; the cold source end and the electric power generation device are located in the cavity. A heat conduction fluid is filled into the cavity, the heat conduction module extends from the cavity to the outside of the well. Accordingly, a temperature difference between the cold source end and the heat source end is created to enable the mechanical power generation device to mechanically drive the electric power generation device to generate electricity.

A hybrid geothermal electrical power generation system that utilizes the heat from a deep geothermal reservoir to vaporize a working fluid, such as steam, CO.sub.2 or an organic fluid. The vaporized working fluid is used to turn a turbine connected to an electrical power generator. A solar collector may be used to increase the temperature of the working fluid during sunlight hours and a thermal storage unit may be utilized to increase the temperature of the working fluid during the night. A supercritical CO.sub.2 power generation cycle may be used alone or in combination with a steam turbine power generation cycle to utilize all of the heat energy. A vapor compression cycle, a vapor absorption cycle may be utilized to provide heating and cooling. A low temperature shallow geothermal reservoir may be used as a heat exchanger to regulate or store excess heat.

A geothermal process for generating electricity includes: heating a primary fluid by absorbing thermal energy from a geothermal energy source to elevate thermal energy and kinetic energy of the primary fluid; increasing a pressure on the primary fluid to raise a boiling point and a temperature of the primary fluid and decrease latent heat of the primary fluid; driving a mechanical device via one of: the kinetic energy of the primary fluid; and a kinetic energy of a secondary working fluid that absorbs the thermal energy of the primary fluid in a heat exchanger; and driving an electricity generator by the mechanical device to generate electricity. The pressure on the primary fluid may be increased by restricting, a flow path of the primary fluid to create a backpressure, by increasing a density of the primary fluid, or by increasing a pumping pressure of the primary fluid into the geothermal well.

A heating and cooling system powered by renewable energy and assisted with geothermal energy includes a solar cycling unit, a supercritical carbon dioxide (S—CO.sub.2) unit, and a refrigerant cycling unit. Solar energy obtained at the solar cycling unit may be used to power the S—CO.sub.2 cycling unit. To do so, the solar cycling unit utilizes a solar collector, a thermal energy storage, and a heat exchanger along with a first working fluid which is preferably molten salt or Therminol. Next, the energy generated at the S—CO.sub.2 cycling unit, which preferably circulates S—CO.sub.2 as a second working fluid, may be used to operate the refrigerant cycling unit. In the refrigerant cycling unit, Tetrafluroethene is preferably used as the third working fluid to produce required cooling effects. Additionally, geothermal heat exchangers may be integrated into the system for use during varying weather conditions.

Provided here is an architectural plan (the solution) for the restoration of the terminal lake, the Salton Sea, an area of prevalent geothermal sources. It includes division of the Lake into three sections, preventing pollution of the Lake from nearby farmlands and importing seawater in central section with pipeline system; providing condition for tourism, and wildlife sanctuary; generating electricity by harnessing hydro, solar, and geothermal energy; and producing potable water and lithium as byproducts. Also includes a system and method for harnessing geothermal energy for generation of electricity by using complete closed loop heat exchange systems combined with onboard drilling apparatus. The system includes several devices operating separately in many different applications in energy sectors, Also, included is alternative use for the In-Line-Pump for marine crafts propulsion.

A system comprising a non-water working fluid feed stream, a compressor configured to compress the non-water based working fluid, to provide a compressed non-water based working fluid; and an energy recovery system configured to recover energy from the compressed non-water based working fluid, to provide a de-energized compressed non-water based working fluid, wherein the energy recovery system captures at least a portion of excess energy from the compressed non-water based working fluid and converts the captured excess energy to electricity, heat energy, or both electricity and heat energy.

A stand-alone long-distance closed-loop heat energy capture, conveyance, and delivery system, comprises three closed-loop modules in serial communication. The first module is in communication with a first closed-loop piping infrastructure interconnected with a source of heat energy, and has a LBP liquid circulating therein whereby the LBP liquid is converted into its gas phase when flowing through the source of heat energy thereby capturing a portion of heat energy therefrom, and is converted into its liquid phase when flowing through a first heat exchanger that transfers the captured-heat energy to a second closed-loop piping infrastructure wherein also is circulating a LBP liquid. The second closed-loop module may extend for long distances. The captured-heat energy in the second module is transferred to a third closed-loop piping infrastructure wherein is also circulating a LBP liquid. The captured-heat energy is transferred from the third module to a delivery site.

A stand-alone long-distance closed-loop heat energy capture, conveyance, and delivery system, comprises three closed-loop modules in serial communication. The first module is in communication with a first closed-loop piping infrastructure interconnected with a source of heat energy, and has a LBP liquid circulating therein whereby the LBP liquid is converted into its gas phase when flowing through the source of heat energy thereby capturing a portion of heat energy therefrom, and is converted into its liquid phase when flowing through a first heat exchanger that transfers the captured-heat energy to a second closed-loop piping infrastructure wherein also is circulating a LBP liquid. The second closed-loop module may extend for long distances. The captured-heat energy in the second module is transferred to a third closed-loop piping infrastructure wherein is also circulating a LBP liquid. The captured-heat energy is transferred from the third module to a delivery site.

A carbon negative clean fuel production system includes: a main platform; a heat collection device for capturing heat from a hydrothermal emissions from a hydrothermal vent on a floor of an ocean; a heat-driven electric generator; a heat distribution system including a heat absorbing material and a heat transporting pipe; anchor platforms tethered to the main platform; a mineral separator; a seawater filtration unit; a water splitting device; a sand refinery machine; a carbon removal system; and a chemical production system for producing hydrides, halides and silane. Also disclosed is a method for carbon negative clean fuel production, including: capturing heat; producing electric energy; separating minerals; filtering seawater; splitting water; refining sand; removing carbon dioxide; and producing hydrides, halides, and silane.