An arrangement for cooling components of a subsea electric system including a tank filled with a dielectric fluid. The tank includes first and second sections. The arrangement includes one first electric component within the first section, and one second electric component within the second section. The arrangement includes a first heat exchanger located outside the tank and in fluid contact with the tank, and arranged during operation to be in thermal contact with sea water. The arrangement includes a pump arranged to force a flow of dielectric fluid through the first heat exchanger. Flow of dielectric fluid in the tank is by both natural and forced convection generated by the pump. The first electric component generates more heat than the second electric component. Within the first section the share of the flow by natural convection is greater than within the second section.

A cooling apparatus (1) for cooling a fluid by means of surface water comprises a plurality of tubes (10) for containing and transporting the fluid to be cooled in their interior, the tubes (10) being intended to be at least partially exposed to the surface water during operation of the cooling apparatus (1). Furthermore, the cooling apparatus (1) comprises a plurality of light sources (21, 22) for producing light that hinders fouling of the exterior of the tubes (10), the light sources (21, 22) being dimensioned and positioned with respect to the tubes (10) so as to cast anti-fouling light over the exterior of the tubes (10), wherein the light sources (21, 22) have a generally elongated shape, and wherein the light sources (21, 22) are arranged in at least two mutually different orientations in the cooling apparatus (1).

A device for grinding and reducing food waste to be disposed of in sewage systems. The device eliminates disagreeable odours by flooding the grinding chamber with water using a swivel plug that retains a gap of fresh water from the last use of the tap. The fresh water serves as a barrier to odors by creating a partition, isolating the dirty water in the grinding chamber. The matter to be grinded is segmented and torn up several times by a grinding apparatus made of cutting blades while it swirls in the water until it is reduced to particles small enough to pass through openings in a spherical grid. The device can be adapted to different uses: residential, commercial or industrial.

An assembly comprises a wet compartment (100) having at least one inlet opening for allowing water to enter the wet compartment (100), a functional unit (2) located in the wet compartment (100), a dry area (200) which cannot be reached by water and which is outside of the wet compartment (100), a barrier (110) situated between the dry area (200) and the wet compartment (100), and at least one energy source (20) which is arranged and configured to emit energy for preventing biofouling of at least an exterior surface (17) of the functional unit (2), wherein the energy source (20) is arranged in the dry area (200), a path (112) being present between the dry area (200) and the wet compartment (100) for allowing energy emitted by the energy source (20) during operation thereof to reach the wet compartment (100), through the barrier (110).

An anti-fouling system for use with a wet compartment having at least one inlet opening for allowing water to enter the compartment is configured to receive and operate at least one anti-fouling source for emitting anti-fouling light in order to keep at least one surface as present in the compartment free from biofouling. The system comprises a controller for controlling operation of the at least one anti-fouling source, the controller being configured to determine at least one operation parameter of the at least one anti-fouling source in relation to at least one of at least one water-related parameter, at least one surface-related parameter and at least one opening-related parameter.

A pressure compensated subsea electrical system and a pressure compensated subsea electrical system which has a housing filled with a dielectric liquid. The housing has a first housing portion and a second housing portion in pressure communication with each other. The first housing portion includes a transformer, and the second housing portion includes a power converter. The pressure compensated subsea electrical system includes a pressure compensator arranged to compensate pressure inside the housing. The pressure compensator is enabled to compensate pressure in both the first housing portion and the second housing portion.

A cooling apparatus (1) for cooling a fluid by means of surface water, the cooling apparatus comprising at least one tube (8) for containing and transporting the fluid in its interior, the exterior of the tube (8) being in operation at least partially submerged in the surface water so as to cool the tube (8) to thereby also cool the fluid, characterized in that the cooling apparatus is adapted to receive at least one light source (9) for producing light that hinders fouling, wherein, after the cooling apparatus has received the light source, the at least one light source (9) is dimensioned and positioned with respect to the tube (8) so as to cast anti-fouling light over the tubes' (8) exterior.

A cooling apparatus for cooling a fluid by surface water includes more than one tubes for containing and transporting the fluid in its interior, the exterior of the tube being in operation at least partially submerged in the surface water so as to cool the tube to thereby also cool the fluid. The cooling apparatus also includes at least one light source for producing light that hinders fouling on at least part of the submerged exterior, and at least one optic unit for enhancing the distribution of anti-fouling light on the submerged exterior.

A cooling apparatus for cooling a fluid by surface water includes at least on tube for containing and transporting the fluid in its interior, the exterior of the tube being in operation at least partially submerged in the surface water so as to cool the tube to thereby also cool the fluid. The cooling apparatus also includes at least one light source for producing light that hinders fouling on at least part of the submerged exterior.

An apparatus for the treatment and transformation of municipal wastewater sludge or any other organic putrescible matter into biogas and liquid fertilizer by methanation. Several consecutive floating cylindrical bioreactors almost totally immersed in water, are bathing longitudinally in a thermally insulated basin to maintain set temperatures, mixing their contents by revolving on themselves by the action of air ejected from a conduit underneath them, engaging all elements in a collective momentum, from a multiplied force, because of the constant free power of each air bubble lodged in exterior buckets and grouped as a lifting force. The gas produced by methanation of the organic waste furnishes a source of heat and its pressure is used for the functioning of the whole apparatus, including several types of pumps, valves, and a new model of steam engine. A network of hoses is provided to bring the fertilizer to the farmlands.