A geothermal heat exchange apparatus is disclosed that includes a central conduit, a plurality of pipes, at least one fitting, at least one joint, a sleeve, and a weight. The geothermal heat exchange apparatus is preassembled for insertion into a bore hole and for connection to a supply primary pipe and a return primary pipe that are in fluid communication with a heat pump. The geothermal heat exchange apparatus includes the plurality of pipes in a helical arrangement around the central conduit for geothermal heat exchange. The weight can be included in the preassembled geothermal heat exchange apparatus or added after preassembly.

A binary power plant system, comprising: a vaporizer for vaporizing an organic motive fluid circulating in a closed Organic Rankine Cycle (ORC) by a heat source fluid in heat exchange relation therewith and producing wet organic motive fluid vapor having a quality of at least approximately 80 percent; and a single organic vapor, turbine of said ORC: having an inlet for receiving the wet organic motive fluid vapor, wherein organic motive fluid vapor is expanded in said single organic vapor turbine without causing turbine blades of the turbine to be subjected to erosion.

The present invention relates to a method of characterizing organic hydrocarbon compounds contained in a solid deposit of a geothermal plant, by measuring a quantity of organic hydrocarbon compounds released by a solid deposit sample during heating by pyrolysis according to a temperature sequence such that: from a temperature (T1) ranging between 50° C. and 120° C., the temperature of a rock sample is raised to a temperature (T2) ranging between 180° C. and 220° C. This temperature (T2) is then maintained for a predetermined duration. The temperature of the sample is raised to a temperature (T3) ranging between 330° C. and 370° C. This temperature (T3) is maintained for a predetermined duration. The temperature of the sample is thereafter raised to a temperature (T4) ranging between 630° C. and 670° C.

A well tool device for forming a permanent barrier in a well includes a housing and an ignition device. A compartment is provided in the housing. A pyrotechnic mixture or heat generating mixture is provided within the compartment. The ignition device is adapted to heating at least a part of the pyrotechnic mixture or the heat generating mixture to its ignition temperature. If the pyrotechnic mixture is provided, the pyrotechnic mixture includes a first metal and at least a section of the housing is made of the first metal. If the heat generating mixture is provided, at least a section of the housing is made from a material being a constituent of the heat generating mixture.

The present disclosure relates to systems and methods of enhanced geothermal energy production that transports fluid from existing underground fluid reservoirs to a deeper, higher temperature radiator zone for fluid heating before recovery at the surface. One system includes at least one radiator injection well extending from a subterranean water reservoir of a formation to a radiator zone of the formation that is located at a greater depth than the subterranean water reservoir. The radiator injection well is configured to fluidically couple the subterranean water reservoir with the radiator zone to transfer fluid contained in the subterranean water reservoir to the radiator zone for heating. At least one recovery well extends from the surface to the radiator zone and is configured to recover fluid from the radiator zone that was transferred from the subterranean water reservoir to the radiator zone. The recovered fluid is then used at the surface to generate electricity.

A concentric pipe geothermal heat exchanger well head is described. The well head may include a riser pipe having an outer pipe and an inner core pipe, wherein an inner heat exchanger pipe is coupled to the inner core pipe, a reducer coupled to an outer heat exchanger pipe on one side and coupled to the outer pipe on a second opposite side to conduct fluid between the outer heat exchanger pipe and the outer pipe, a flow pipe parallel to and biaxial with the riser pipe configured to be coupled to a geothermal heat pump, and an elbow coupled to the outer pipe to couple fluid between the outer pipe and the well head pipe.

A heat transfer system includes a conduit having open first and second ends, first and second thermal exchange segments disposed in-between and in fluid communication with the ends, and a means for adding fluid to the first end. The first thermal exchange segment is disposed underneath and in thermal communication with the ground, a body of water, or other location with a different temperature. The first and second ends are arranged above all other section of conduit and relative to one another so that they are communicating vessels and a change in fluid level in one changes the fluid level in the other. The means for adding fluid to the first end of the conduit causes fluid to flow freely from the first end to the second end and fluid level to rise in the second overcoming any hydrostatic pressure in the system without a pump disposed along the conduit.

The field of the invention relates to systems and methods for exchanging heat from the degradation, decomposition, and chemical/biochemical transformation of municipal, industrial, and other types of waste. In one embodiment, a heat extraction system may include a closed-loop fluid circulation piping channeled throughout at least one heat extraction well oriented throughout a waste mass. The piping is fluidly coupled to a heat exchanger. A first circulation fluid is circulated through the closed-loop circulation piping into various depths of the waste mass to transfer thermal energy between said mass and said heat exchanger. In one embodiment, the transfer of thermal energy between the waste mass and the heat exchanger is used as alternative energy method and to control at least one of shear strength, compressibility, and hydraulic conductivity of the waste mass.

A geothermal system including a multitube vertically-sealed underground heat-exchanger includes: a geothermal well formed by vertically excavating a foundation; a heat pump which is arranged in the foundation, and which includes a circulating pump; and a connection tube, an auxiliary facility, and a multitube vertically-sealed underground heat-exchanger which are buried and installed in the geothermal well, and which are connected to the heat pump such that a thermal fluid thermally restored in the geothermal well is supplied to the heat pump through the circulating pump, and the thermal fluid that has undergone heat exchange in the heat pump is recovered back to the geothermal well and thermally restored therein.

A method of inhibiting corrosion of a metal surface in contact with geothermal system is provided. The method may include contacting the metal surface with a corrosion inhibitor composition by adding the composition to geothermal process water. The corrosion inhibitor composition may include an organic phosphonate, an ortho phosphate, and zinc or a salt thereof.