A heat exchange circuit for a geothermal plant comprising a well excavated in the rock, a casing arranged inside the well, integral with it and comprising at least a first perforated section extending along a first portion of the well and at least a second perforated section extending along a second portion of the well, the perforated sections allowing the exit and the entry of a flow of geothermal fluid contained in an aquifer, an internal duct, located inside the casing in which a heat transfer fluid flows, wherein the well, the casing and the internal duct being arranged as a substantially closed ring, except for at least one surface interruption, at least one heat-exchange section at the bottom of the well between the first portion and the second portion of the well within which the geothermal fluid transfers heat to the heat transfer fluid.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation in the vicinity of a wellhead during hydrocarbon production to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of wellhead fluid from the wellhead or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of wellhead fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation in the vicinity of a wellhead during hydrocarbon production to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of wellhead fluid from the wellhead or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of wellhead fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

A process for generating power from a warm saline steam (1) obtained from geothermal sources. The process involves extracting a warm saline stream (1) from an underground geothermal formation (2), reducing the temperature of the saline stream (1) by passing the stream through a thermal power unit (5) in which thermal energy present in the stream is extracted. The process also involves converting latent osmotic energy present in the stream into electricity by passing the stream through an osmotic power unit (7) comprising a semi-permeable membrane (8). The output stream (13) derived from passage through the osmotic power unit is injected into a second, different underground formation.

The present disclosure relates to techniques for extracting heat energy from geothermal briny fluid. A briny fluid can be extracted from a geothermal production well and delivered to a heat exchanger. The heat exchanger can receive the briny fluid and transfer heat energy from the briny fluid to a molten salt. The molten salt can be pumped to a molten salt storage tank that can serve as energy storage. The briny fluid can be returned to a geothermal source via the production well. The briny fluid can remain in a closed-loop system, apart from the molten salt, from extraction through return to the geothermal production well.

A method of generating electricity from geothermal energy utilizing an in situ closed loop heat exchanger deep within the earth using a recirculating heat transfer fluid to power an in situ modular turbine and generator system within a vertical, large bore, deep, tunnel shaft. The shaft length and diameter are dependent on the shaft temperature and sustaining heat flux. The method further includes methods of deep shaft boring and excavating, liner placement and sealing, shaft transport systems, shaft Heating, Ventilation, and Air Conditioning, and operations and maintenance provisions. The method has few global location restrictions, maximizes thermal efficiency as to make power generation practical, has a small site surface footprint, does not interact with the environment, is sustainable, uses renewable energy, and is a zero release carbon and hazardous substance emitter.

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.

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.

A heat exchange circuit for a geothermal plant comprising a well excavated in the rock, a casing arranged inside the well, integral with it and comprising at least a first perforated section extending along a first portion of the well and at least a second perforated section extending along a second portion of the well, the perforated sections allowing the exit and the entry of a flow of geothermal fluid contained in an aquifer, an internal duct, located inside the casing in which a heat transfer fluid flows, wherein the well, the casing and the internal duct being arranged as a substantially closed ring, except for at least one surface interruption, at least one heat-exchange section at the bottom of the well between the first portion and the second portion of the well within which the geothermal fluid transfers heat to the heat transfer fluid.

It is provided a power generation model based on a transcritical cycle with an increasing-pressure endothermic process using CO.sub.2-based mixture working fluids for an enhanced geothermal system, including a geothermal water circulation, a mixture working fluid circulation and a cooling water circulation. A coaxial pipe-in-pipe downhole heat exchanger is provided in the mixture working fluid circulation. Innovations are reflected in that an increasing-pressure endothermic process is achieved due to making use of gravity and hence increase a heat quantity absorbed in a cycle, thereby improving power generation quantity of the cycle; and a binary mixture working fluid composed of CO.sub.2 and an organic working fluid is adopted to realize a transcritical power cycle with an increasing-pressure endothermic process and a decreasing-temperature exothermic process, thereby effectively reducing irreversibility of a heat transfer between a working fluid and a heat source and improving power cycle efficiency.