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).

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).

The present invention relates to heat extraction from a hot dry rock system using a single well with multilaterals in a closed loop circulation. More particularly, it relates to geothermal heat collector systems. A working fluid is circulated through a single well (106) with several lateral heat absorbing branches (113). These branches are sidetracked off the main wellbore (111) and completed using a slotted lateral sealed bore junction and hanger assembly completion (114) installed in the main wellbore (111). The lateral heat absorbing branches (113) are tied in and completed in a tubing mono assembly, comprising of the well (106) and lateral heat absorbing branches (113). The tubing assembly is hung off in a slotted tubing hanger assembly (112) that is installed in the bottom section of the main wellbore (111). The hanger assemblies are equipped with circulation ports and open hole rock slips. The heat extraction is done through direct contact between the working fluid and the formation.

The present invention relates to heat extraction from a hot dry rock system using a single well with multilaterals in a closed loop circulation. More particularly, it relates to geothermal heat collector systems. A working fluid is circulated through a single well (106) with several lateral heat absorbing branches (113). These branches are sidetracked off the main wellbore (111) and completed using a slotted lateral sealed bore junction and hanger assembly completion (114) installed in the main wellbore (111). The lateral heat absorbing branches (113) are tied in and completed in a tubing mono assembly, comprising of the well (106) and lateral heat absorbing branches (113). The tubing assembly is hung off in a slotted tubing hanger assembly (112) that is installed in the bottom section of the main wellbore (111). The hanger assemblies are equipped with circulation ports and open hole rock slips. The heat extraction is done through direct contact between the working fluid and the formation.

A geothermal reservoir induces gasification and water gas shift reactions to generate hydrogen. The hydrogen or protons are produced to surface by using hydrogen-only or proton-only membranes in production wells. Energy from the reservoir is produced to surface as protons or hydrogen.

A geothermal reservoir induces gasification and water gas shift reactions to generate hydrogen. The hydrogen or protons are produced to surface by using hydrogen-only or proton-only membranes in production wells. Energy from the reservoir is produced to surface as protons or hydrogen.

The present invention relates to tactile warning panels, and in particular to tactile warning panels that are designed and built with multifunction/multipurpose capabilities that serve the visually impaired and enable the deployment of smart city technology by integrating tactile warning systems and subsurface enclosures that can withstand pressures of five (5) tons up to and exceeding sixty (60) tons and incorporate small cells, beacons, sensors, Fog Computing, electric energy generation, rechargeable power supplies, wireless M2M communication and a plethora of other smart city technologies.

Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for stimulating convective thermal recharge in a hot sedimentary aquifer (HSA) used in geothermal energy generation applications. An example system pumps, via an extraction well, heated water from an extraction depth of a hot sedimentary aquifer (HSA) identified based on a convective heat transfer coefficient of the HSA satisfying a threshold convective heat transfer coefficient. The system then extracts, via a power generation unit, heat from the heated water to generate power and transform the heated water into cooled water. Subsequently, the system injects, via an injection well, the cooled water at an injection depth of the HSA. As a result of these operations, the system stimulates a convective flow field within the HSA having a convective heat transfer rate sufficient to provide a convective thermal recharge of the extracted heat.

Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for stimulating convective thermal recharge in a hot sedimentary aquifer (HSA) used in geothermal energy generation applications. An example system pumps, via an extraction well, heated water from an extraction depth of a hot sedimentary aquifer (HSA) identified based on a convective heat transfer coefficient of the HSA satisfying a threshold convective heat transfer coefficient. The system then extracts, via a power generation unit, heat from the heated water to generate power and transform the heated water into cooled water. Subsequently, the system injects, via an injection well, the cooled water at an injection depth of the HSA. As a result of these operations, the system stimulates a convective flow field within the HSA having a convective heat transfer rate sufficient to provide a convective thermal recharge of the extracted heat.

Thermal energy is extracted from geological formations using a heat harvester. In some embodiments, the heat harvester is a once-through, closed loop, underground heat harvester created by directionally drilling through hot rock. The extracted thermal energy can be converted or transformed to other forms of energy.