Abstract: A solution mined cavity system and method are disclosed. The system comprises an underground cavity created by solution mining in salt deposits, an upper water reservoir, tubing structure adapted to lead water from the upper water reservoir into the underground cavity and out of the underground cavity, and a pumping device adapted to contribute to pumping water from the upper water reservoir via the tubing structure out of the cavity.

Abstract: A fine bubbles generation system for converting gas into fine bubbles in liquid is disclosed. The system comprises a reactor vessel comprising gas input means (2), liquid input means (8), liquid output means, and agitation (7) and mechanical interaction means (11) arranged for providing fine bubble-laden liquid in a two-step process. A fine bubbles generation method for converting gas into fine bubbles in liquid is also disclosed.

Abstract: A method for exhaust gas treatment in vessels/installations located in a body of water is disclosed. The method comprises admixing ambient air to exhaust gas in a dilution unit (3) resulting in diluted exhaust gas, drawing water and diluted exhaust gas into bubble generator (4) and generating bubbles containing diluted exhaust gas in the water, and releasing the bubble-containing water into the body of water. A corresponding system is also disclosed.

Abstract: A marine bioproduction facility for farming of sessile marine organisms in a body of water is disclosed. The facility comprises an array of at least two production modules in contiguous geometrical relationship to each other, where each of the at least two production modules is adapted to be arranged within a vertical column with a predefined horizontal cross section and extending downwards from the water surface, where at least one of the at least two production modules comprises at least one growth surface for sessile marine organisms, and an upper part comprising at least one opening adapted to allow access to the vertical column. Further, a method for growth and harvesting of marine sessile organisms using the marine bioproduction facility is presented.

Abstract: Hydrogels and preparation of biocompatible, in situ gelling and injectable hydrogels composed of cellulose nanofibrils and using them for tissue and organ repair and regeneration. The present invention demonstrates cellulose nanofibrils with tuned size (fibril length and distribution), high crystallinity, and high purity, variable concentration in water, and controlled charge for injectable hydrogels. The current application discovers that in situ gelling can be achieved by controlling the degree of substitution of cellulose nanofibrils through carboxymethylation. After injection, they can form three-dimensional gels and provide attachment sites and guidance for cells to facilitate tissue and organ repair. They can be also loaded with drugs, growth factors, or signaling molecules to be delivered to targeted locations in the body and released in a controlled manner.

Abstract: A multiphase fluid pressurized hydroelectric power generation system is disclosed. The system comprises a combination of fluids in the liquid and gas phase in contact with each other, a plurality of water reservoirs where at least one is a closeable water reservoir comprising a closeable volume i.e. a confined space where all fluid flow in and out is controlled, and a source of pressurized fluid arranged for supplying pressurized fluid to the at least one closeable water reservoir. A corresponding method is also disclosed.

Abstract: An underwater energy storage system comprising a container where energy is stored by transporting water between the container and a body of water, is disclosed. 5 The container comprises a water- and gas-tight membrane surrounding a container volume, where the container is rendered mainly incompressible by a fill material comprising densely packed, incompressible objects arranged in the container volume, the fill material forming a mainly incompressible aggregate.

Abstract: 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).

Abstract: A hydroelectric energy production and storage system comprising an upper reservoir located in a depression or cavity in the ground and a lower reservoir located underground, where objects are arranged in the depression or cavity forming an aggregate which fills the depression or cavity and comprises hydraulically communicating void volumes between the objects is disclosed. Further, a method for building and operating such a system is presented.

Abstract: An energy island system arranged related to a body of water with a seafloor, a surface and a depth over an underground is disclosed. The system comprises a structurally rigid shell (1) extending from the seafloor to above the water surface, inclosing a lagoon of the body of water, material with a negative buoyancy stacked around the shell (1) forming a gravity stabilized wall (2), and a tunnel (5) established in the wall (2), providing for hydraulic communication between the surrounding body of water and the interior of the shell (1). Further, a method for construction of an energy island is disclosed.

Abstract: A solution mined cavity system and method is disclosed. The system comprises an underground cavity created by solution mining in salt deposits, an upper water reservoir, tubing means adapted to lead water from the upper water reservoir into the 5underground cavity and out of the underground cavity, and pumping means adapted to contribute to pumping water from the upper water reservoir via the tubing means out of the cavity.

Abstract: A multi-mode subterranean energy system and a related multi-mode subterranean energy production method are disclosed. The system comprises subterranean tunnels (2, 3, 8, 9, 14) connecting an upper reservoir of water (1), an underground cavity (10) and a subterranean recipient (15), a turbine/pump unit (4), and water flow control means (5, 6, 7). The system optionally can be operated in four modes.

Abstract: A hydropower system for generating and storing energy is disclosed. The system comprises an upper (1) and a lower (2) level reservoir, and an electromechanical system (12) arranged in the lower level reservoir and in hydraulic connection with the upper level reservoir. A related method generating and storing energy is also disclosed.

Abstract: A method for generating underground energy using water from a water mass above an underground recipient is disclosed. The method comprises two modes; namely a 5 hydroelectric mode and a thermal mode, and steps for switching between the modes.

Abstract: An aquatic biofiltration system where invertebrate aquatic filtering organisms in the form of tunicates filter free-floating particulates in a water volume is disclosed. The system provides a habitat for tunicates with at least one residence device (5, 6) adapted to be arranged in a water volume, and a collection system (7) adapted to collect expelled solids from the tunicates. A biofiltration method for filtering particulates from a volume of water is also disclosed.

Abstract: An underwater energy storage system comprising a container where energy is stored by transporting water between the container and a body of water, is disclosed. 5 The container comprises a water- and gas-tight membrane surrounding a container volume, where the container is rendered mainly incompressible by a fill material comprising densely packed, incompressible objects arranged in the container volume, the fill material forming a mainly incompressible aggregate.

Abstract: A tunicate tending and harvesting system for the tending and harvesting of tunicates (15) grown on at least one elongated, suspended growth surface (7) is disclosed. The system comprises a tending and harvesting machine (14), the machine (14) comprising at least a first and a second treatment stage, and means for moving the at least one growth surface (7) sequentially through the treatment stages. Further, a tunicate tending and harvesting method for the tending and harvesting of tunicates grown on at least one elongated suspended growth surface (7) is disclosed.

Abstract: A biobank and database system for storage of and interactions with biological samples in vitro is disclosed. The system comprises incubators for living tissue, and a number of biological samples where each biological sample is either an organoid or a sample containing live tissue, supported by or containing cellulose derived from tunicates. The system further comprises means for monitoring and manipulating each biological sample, a chronologic ledger with automatic registration of all relevant data pertaining to provenance and pre-history of each biological sample as well as information on all manipulations performed on each biological sample and results obtained. The system further comprises one or more nodes arranged to communicate with the incubators, and control access to the chronologic ledger and to the biological samples in the incubators. The chronologic ledger may be structured as a blockchain.

Abstract: A method for generating underground energy using water from a water mass above an underground recipient is disclosed. The method comprises two modes; namely a 5 hydroelectric mode and a thermal mode, and steps for switching between the modes.

Abstract: An aquatic biofiltration system where invertebrate aquatic filtering organisms in the form of tunicates filter free-floating particulates in a water volume is disclosed. The system provides a habitat for tunicates with at least one residence device (5, 6) adapted to be arranged in a water volume, and a collection system (7) adapted to collect expelled solids from the tunicates. A biofiltration method for filtering particulates from a volume of water is also disclosed.