Abstract: The embodiment of the present application discloses a single-well heat exchange system and a downhole enhanced heat exchange device of a geothermal well. The first main pipe communicates with an inner pipe of the single-well heat exchange device, return water entering the inner pipe sequentially enters the first main pipe and the second main pipe, part of the return water directly flows back to a geothermal reservoir, and part of the return water enters an annulus between the inner pipe and an outer casing of the single-well heat exchange device through a through hole of the second main pipe. The part, located at a target reservoir, of the retractable heat exchange pipe is used for absorbing geothermal heat of the target reservoir and transmitting the geothermal heat to an fixed end of the retractable heat exchange pipe to heat the return water entering the first main pipe.

Abstract: Nano-electromechanical systems (NEMS) sensor devices that utilize thin electrically conductive membranes, which can be, for example, graphene membranes. The NEMS devices can have a trough shape (such as a serpentine shape arrangement) of the electrically conductive membrane. The thin, electrically conductive membrane has membrane-structures disposed upon it in an array of cavities. These membrane structures are between the thin, electrically conductive membrane and the main membrane trace. Such an arrangement increases the sensitivity of the NEMS sensor device. The electrically conductive membrane can be controllably wicked down on the edge of the oxide cavity to increase the sensitivity of the NEMS sensor device. Such NEMS sensor devices include NEMS sensor devices that are well suited to applications that measure magnetic fields that, operate below 10 kHz, such as brain-computer interfaces.

Abstract: A carbon dioxide capture system, fluid contactor and method are disclosed. In embodiments, a gas-liquid contactor unit is disposed along a process fluid flow axis and includes a contactor of network flow diversions barriers with flow voids for movement of process fluids therebetween. A plurality of heat exchange channels are provided in the flow diversion barriers to transport a heat exchange fluid through the contactor network. A heat exchange feed channel is provided to deliver feed of the heat exchange fluid to the heat exchange channels at multiple feed locations spaced along the flow axis. At least one heat exchange bypass channel may extend beyond the multiple feed locations to deliver a portion of the feed of the heat exchange fluid to additional heat exchange channels located downstream from the multiple feed locations for the heat exchange channels.

Abstract: A battery module includes a row of battery cells arranged parallel to each other, aligned along a longitudinal axis, and arranged at a distance from each other so that adjacent battery cells define a gap allowing a temperature control fluid to pass therethrough. A holding device includes a main body, a plurality of spacers and retaining means. Each spacer includes a mounting foot and a separator plate integrally formed with the mounting foot. The separator plate is arranged in the gap and configured to separate a first pass and a second pass of the temperature control fluid. The mounting feet are slidably mounted parallel to the longitudinal axis, defining a sliding connection. The retaining means includes axial clamping means which axially compresses an axial stop of the retaining means against a battery cell located at an axial end of the row of battery cells.

Abstract: A method and system for performing blackstart functionality from renewable generation and battery energy storage systems are disclosed. A plant may include a microgrid that includes one or more customer loads and that may provide power to a utility grid. Blackstart may be performed to restore operations to part or all of the plant or to external loads such as microgrid customer loads or part of the utility grid. In practice, blackstart may be performed in order to restore operation to the one or more feeders in the plant, such as to the generation sources within the plant, to restore power to the plant auxiliary loads, customer loads in the microgrid, and to provide power to different sections of the grid when transitioning from shutdown mode of operation. In this way, the method and system may automatically transition from a shutdown mode of operation to an islanded mode of operation.

Abstract: A method and system for transitioning between grid-tied and islanded modes of operation are disclosed. A plant may include a microgrid that includes one or more customer loads and that may provide power to a utility grid. The plant may include clean energy sources, such as DC-coupled photovoltaics and battery systems, as well as other types of clean energy generation and storage technologies. In certain instances, the plant may transition from grid-tied (in which the plant receives or provides power to the utility grid) to islanded (where the plant is disconnected from and does not receive or provide power to the utility grid), and vice-versa. The method and system may automatically transition between grid-tied and islanded without interruption of power to the one or more customer loads.

Abstract: The present application provides a thermal power plant seawater desalination and lithium extraction system, including a seawater desalination apparatus and a seawater lithium extraction apparatus. The seawater desalination apparatus is connected to a power supply of a thermal power plant or a peak load and frequency regulation power supply line, so that the seawater desalination apparatus is supplied with power through surplus power of the thermal power plant; the seawater desalination apparatus is connected to a turbine extraction steam system of the thermal power plant, so that heat is supplied to the seawater desalination apparatus through the turbine extraction steam system; the seawater lithium extraction apparatus is connected to the seawater desalination apparatus, so that concentrated seawater generated in a process of desalinating seawater by the seawater desalination apparatus is introduced into the seawater lithium extraction apparatus as a raw material for a seawater lithium extraction process.

Abstract: A battery module includes a row of battery cells arranged parallel to each other, aligned along a longitudinal axis, and arranged at a distance from each other so that adjacent battery cells define a gap allowing a temperature control fluid to pass therethrough. A holding device includes a main body, a plurality of spacers and retaining means. Each spacer includes a mounting foot and a separator plate integrally formed with the mounting foot. The separator plate is arranged in the gap and configured to separate a first pass and a second pass of the temperature control fluid. The mounting feet are slidably mounted parallel to the longitudinal axis, defining a sliding connection. The retaining means includes axial clamping means which axially compresses an axial stop of the retaining means against a battery cell located at an axial end of the row of battery cells.

Abstract: The present disclosure relates to a rotating construction platform based on a monopile, including a rotary connecting mechanism set on the top of the monopile and a working platform set on the rotary connecting mechanism. The rotary connecting mechanism includes an upper connecting tube, a lower connecting tube and a rotary support structure located between the upper connecting tube and the lower connecting tube. The working platform is fixedly connected to the upper connecting tube, and the lower connecting tube is detachably fixed to the top of the monopile. At least one side of the working platform sticks out of the side of the monopile. The rotating construction platform of the present disclosure can improve the continuity of construction operations, save construction time and costs, avoid vessel machinery from hitting monopile, improve construction positioning accuracy and ensure construction quality.

Abstract: A method for preparing a COF-protected electrode and an electrode are provided. The method includes mixing an organic framework, a small molecular organic acid and a solvent, adding a polar aqueous solution containing a substrate thereto, mixing the above uniformly and heating the system at a low temperature under an inert atmosphere, filtering the solution to obtain precipitates, washing and drying the precipitates to obtain a COF film grown on a surface of the substrate; coating a protective layer on the COF film to obtain a substrate/COF/protective layer film; etching off the substrate to obtain a COF/protective layer film; and transferring the COF/protective layer film to a surface of the electrode, and removing the protective layer.

Abstract: A method and system for a mobile power generation system is disclosed. The mobile power generation system may comprise one or more shipping containers, which may be pre-wired and pre-configured so that configuration and deployment at the deployment site is simplified. The one or more shipping containers may include a PV subsystem, a battery subsystem, PCS, control electronics, and the like. The one or more shipping containers may be pre-configured for power transfer and for communication between the various devices so that less configuration is necessary at the deployment site.

Abstract: Methods and systems for removing impurities from electrolyte solutions having three or more valence states. In some embodiments, a method includes electrochemically reducing an electrolyte solution to lower its valence state to a level that causes impurities to precipitate out of the electrolyte solution and then filtering the precipitate(s) out of the electrolyte solution. In embodiments in which the electrolyte solution is desired to be at a valence state higher than the precipitation valence state, a method of the disclosure includes oxidizing the purified electrolyte solution to the target valence.

Abstract: The present disclosure relates to the technical field of heat pumps, in particular to an air source CO2 heat pump system for preventing an evaporator from frosting by using heat of a heat regenerator. The air source CO2 heat pump system mainly includes an air source heat pump system, a regenerative heat exchange tank and a cooling pump. Through the regenerative heat exchange tank, on the one hand, the temperature drop of regenerative heat of the system is further increased and throttling loss is reduced; on the other hand, the heat generated by the regenerative temperature drop is configured for heat storage used for defrosting, and configured for overheating temperature rise.

Abstract: Dipole audio speakers, and more particularly, voice controlled dipole audio speakers having at least one microphone located substantially along the null sound plane of the dipole audio speaker. An improved loudspeaker system that produces an improved audio quality for stereophonic sound. The improved loudspeaker utilizes conventional electro-dynamic drivers in a sealed chamber that produce sound primarily in the 20-300 Hz band coupled with electrostatic card stack drivers placed outside the sealed chamber that cover the remaining 98% of the audio frequency spectrum (300 Hz to 20 kHz). The improved loudspeaker system can also include multiple card stack drivers that are placed at angles with respect to each other to maximize audio fidelity.

Abstract: An improved loudspeaker system that produces an improved audio quality for stereophonic sound, which can be described as 3D audio. In one embodiment, the improved loudspeaker utilizes at least three stacks of electrostatic transducer cards, with one of the stacks located between the other two stacks. While there is generally some crossover between the frequencies of the stacks of electrostatic transducers, the middle stack will be directed to the lower frequency ranges and the other two stacks will be directed to the higher frequency ranges. Each of the three card stacks will utilize multi-track audio recordings, such as two-track audio recordings, which are modified for each of the three card stacks. In an alternative embodiment, the improved loudspeaker can utilize a conventional voice-coil driver in lieu of the middle stack of electrostatic transducer cards.

Abstract: Nano-electromechanical systems (NEMS) devices that utilize thin electrically conductive membranes, which can be, for example, graphene membranes. The membrane-based NEMS devices can be used as sensors, electrical relays, adjustable angle mirror devices, variable impedance devices, and devices performing other functions. The NEMS devices have a serpentine shape arrangement of the electrically conductive membrane. The electrically conductive membrane can be controllably wicked down on the edge of the oxide cavity to increase sensitivity of the NEMS device.

Abstract: A system and method of providing, assembling and maintaining floating rows and/or arrays of photovoltaic solar panels and terrestrial or elevated based rows and/or arrays of photovoltaic solar panels.

Abstract: A heat exchanger is characterized by having two or more fluid flow circuits, each formed by multiple small cross-section “micro-tubes” contained within a surrounding metal structure, or “metal matrix.” Its function is to efficiently transfer heat from one fluid to another in a highly compact assembly. Most any metal or metal alloy can be considered for the micro-tubes. The micro-tubes, while typically arranged in alternating layers of alternating flow circuits, may be organized in any number of arrangements including co-linear and at cross angles to provide for co-flow, counter flow and cross flow. The metal matrix, is provided in one embodiment by a metal or metal alloy powder consolidated in a hot isostatic pressing (HIP) process. This process also joins the tubes together and to the matrix itself, producing a monolithic structure.

Abstract: An improved compact electroacoustic transducer and loudspeaker system. The electroacoustic transducer (or array of electroacoustic transducers) can generate a desired sound by the use of pressurized airflow. The electroacoustic transducer does not have frames (unlike prior electroacoustic transducers) and an electrically conductive membrane is now supported by a pair of non-conductive vent members.