The invention relates to a system for energy storage and recovery, comprising: at least one compressed-air tank, at least one pressurized-water tank in communication with the compressed-air tank, at least one turbine in effective communication with the at least one pressurized-water tank, a generator for generating electrical energy, a high-pressure pump for pumping water from a water reservoir into the pressurized-water tank. According to one aspect of the invention, the turbine in effective communication with the at least one pressurized-water tank is a reaction turbine, which is connected in series with a constant pressure turbine in such a manner that a drive shaft of the reaction turbine is connected to a drive shaft of the constant pressure turbine and a drive shaft of the generator, and the constant pressure turbine is arranged between the reaction turbine and the generator, wherein the generator includes an interface for connection to a public power grid.

A system for generating, storing and managing energy features a solar-power center, a wind-power center, a hydrogen-power center with hydrogen fuel cells, a hydrogen supply center operable for producing hydrogen, and an energy storage center with both hydrogen storage tanks and one or more rechargeable batteries. An energy management subsystem monitors energy consumption from the system and available energy reserves at the power storage center, and manages the different centers based at least partly on the monitored consumption and reserves. A cooling loop circulates hydrogen for cooling of mechanical and electrical equipment, while heating loops use fuel cell waste heat and collected solar thermal energy for heat-requiring applications, such as warming of the battery storage in cold weather climates. Black-out/brown-out restart capability is included, as well as novel wind turbines whose rotor heights are autonomously adjusted to an optimal elevation based on wind conditions.

Disclosed techniques include energy management transfer through fluid flows. Access to a fluid-based local energy transfer distribution network is obtained. The fluid-based local energy transfer distribution network can include a homogeneous fluid in liquid and gaseous phases. One or more fluid-based energy storage and generation assemblies are connected to the fluid-based local energy transfer distribution network. Energy is provided to the one or more fluid-based energy storage and generation assemblies. Fluid-based energy is delivered to the fluid-based local energy transfer distribution network, where the delivering is based on an energy control management system executing on one or more processors. The delivering includes providing local fluid-based services, where the local fluid-based services supply local consumer applications. The local applications can include a water nozzle, an air nozzle, a water Venturi function, an air Venturi function, a vacuum supply, space heating, a fluid-based rotation, space cooling, hot water, or cold water.

A first energy converter that can consume a first physical energy form of a first energy delivery network can be controlled to produce a second physical energy form of a second energy delivery network and inject the second physical energy form into the second energy delivery network. A second energy converter that can consume the second physical energy form of the second energy delivery system can be controlled to produce the first physical energy form of the first energy delivery network and inject the first physical energy form into the first energy deliver network. The controlling of the first energy converter and the controlling of the second energy converter can be coordinated. Related apparatus, systems, techniques and articles are also described.

A method for liquid air and gas energy storage (LAGES) which integrates the processes of liquid air energy storage (LAES) and regasification of liquefied natural gas (LNG) at the import terminal through the exchange of thermal energy between the streams of air and natural gas (NG) in their gaseous and liquid states and includes harnessing the LNG as an intermediate heat carrier between the air streams being regasified and liquefied, recovering a compression heat from air liquefier for LNG regasification and utilizing a cold thermal energy of liquid air being regasified for reliquefaction of a part of send-out NG stream with its return to LNG terminal.

The present invention relates to systems and methods for pumping or removing a fluid from a region within or on top of or in contact with a water or liquid body and applications for said systems and methods. Some embodiments may also relate to anti-fouling or reducing fouling structures like docks.

Disclosed techniques include energy management with multiple pressurized storage elements. Energy is obtained from one or more energy sources. Energy requirements are modeled over a first time period and a second time period. A first subset of the energy that was obtained is allocated for storage in a first energy store based on the modeling. A second subset of the energy that was obtained is allocated for storage in a second energy store based on the modeling, where the second energy store comprises a pressurized storage element. Energy is routed to the first energy store from the second energy store based on the modeling. Recovering energy further includes using the energy routed to the first energy store or the second energy store, based on the modeling.

The present invention relates to systems and methods for pumping or removing a fluid from a region within or on top of or in contact with a water or liquid body and applications for said systems and methods. Some embodiments may also relate to anti-fouling or reducing fouling structures like docks.

The present invention relates to systems and methods for pumping or removing a fluid from a region within or on top of or in contact with a water or liquid body and applications for said systems and methods. Some embodiments may also relate to anti-fouling or reducing fouling structures like docks.

Disclosed techniques include energy management using a converged infrastructure. Access to one or more fluid-based energy storage and generation assemblies is obtained, where each assembly comprises a pump-turbine and a pressure vessel. The fluid of the one or more fluid-based energy storage and generation assemblies includes liquid air. The one or more fluid-based energy storage and generation assemblies are connected to an electrical energy storage subsystem, where the connecting includes an energy interconnect. The energy interconnect is performed without an electrical subsystem intermediary. The energy interconnect includes a local electrical grid. Energy is provided to the one or more fluid-based energy storage and generation assemblies. The providing is adjusted based on feedback to the energy control management system. Electrical energy is delivered from the energy interconnect, wherein the delivering is based on an energy control management system executing on one or more processors.