A multiple-stacked marine heat exchanger for cooling at least one heat source in a marine vessel having an upper marine heat exchanger with a forward beveled end and upper coolant flow tubes connected thereto, a lower marine exchanger having a forward beveled end which converges with the forward beveled end of the upper marine heat exchanger and lower coolant flow tubes connected thereto, and an ambient water passageway extending through each pair of stacked marine heat exchangers in the multi-stacked marine heat exchanger. In one situation, the beveled ends cooperate to form a stagnant pressure region near the entrance to the ambient water passageway to create an increase in pressure at the entrance to create jets of turbulent water flowing through the passageway to break up the laminar boundary layer and increase heat transfer from the coolant flow tubes.

A cooling apparatus for cooling a fluid by means of surface water, the cooling apparatus comprising 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 and hence different tube portions contain fluid at different temperatures. The cooling apparatus further comprises at least one light source for producing light that hinders fouling on the submerged exterior, wherein the at least one light source is arranged so that the intensity of the anti-fouling light, cast over the exterior of the tube portions whose exterior temperature or the temperature of the fluid they contain is below 80 C., is higher than the intensity of the anti-fouling light cast over the other tube portions. By this structure anti-fouling of the cooling apparatus can be assured in an effective manner.

A device for heat exchange for use with underwater diving equipment including a pressurized gas source is disclosed. The heat exchange device includes a manifold and a heat sink. The manifold distributes gas supplied from the pressurized gas source to breathing equipment. The heat sink is for warming up the gas before the gas is distributed to the breathing equipment using heat exchange with ambient water surrounding the heat sink. The manifold and the heat sink are connected such that the gas warmed up by the heat sink returns to the manifold before being distributed to the breathing equipment. The returning warm gas may warm up the manifold and the cold gas entering the manifold.

Systems and methods for transporting a hydrocarbon are provided. The method can include introducing a fluid at a first pressure and a first temperature to an inlet of a pump and pressurizing the fluid within the pump to produce a pressurized fluid having a second pressure and a second temperature. The method can also include flowing at least a portion of the pressurized fluid through a first heat exchanger and back to the inlet of the pump. The heat exchanger can include a coil having an inlet and an outlet and a housing at least partially enclosing the coil and having a first opening and a second opening. A first end of the coil can be disposed proximate the first opening. The heat exchanger can also include a foundation for supporting the coil and the housing.

An energy-dissipating device and fluid processing system is provided containing a compressor, a motor, a secondary fluid re-circulation loop, a purge line, and a fluid conduit. The compressor is configured to receive a hot fluid including condensable and non-condensable components, and produce therefrom a primary compressed fluid stream and a secondary fluid stream. The motor is configured to drive the compressor and for ingress and egress of the secondary fluid stream. The secondary fluid re-circulation loop is configured to control an operating temperature of the motor. The secondary fluid re-circulation loop includes a first energy-dissipating device configured to remove excess heat from the secondary fluid stream. The purge line separates a first portion of the secondary fluid stream in the fluid re-circulation loop from a second portion of the secondary fluid stream being returned to the motor. The fluid conduit receives the primary compressed fluid stream from the compressor.

Examples of the disclosure provide for an apparatus for actively promoting marine life. The apparatus includes a datacenter implemented in a body of water and coupled to a network, a pressure vessel that houses the datacenter, and one or more components coupled to the pressure vessel and adapted to actively promote reef life and sustain a surrounding ecosystem.

A heat exchanger for a marine engine has a housing with an internal cavity. Twisted tubes snake back and forth inside the cavity and carry a first fluid to cool a second engine cooling fluid flowing through the cavity. Each of the twisted tubes has a plurality of ridges to increase the surface area of the tube exposed to the second fluid. Dividers inside the cavity direct the flow of the second fluid through the cavity. The housing may have a removable cover to access the housing cavity.

An outboard marine propulsion system with a closed loop lower unit heat exchanger is described. The closed loop lower unit heat exchanger provides improved cooling to outboard marine propulsion units and increases engine life compared with traditional open loop cooling systems, particularly in harsh environments such as salt water, brackish water, swamp, shallow or sediment and debris rich water. The closed loop lower unit heat exchanger also provides improved performance to the outboard marine propulsion system when mounted to an appropriate portion of the lower unit of the outboard marine engine such as the anti-cavitation plate.

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).

An outboard marine propulsion system with a closed loop lower unit heat exchanger is described. The closed loop lower unit heat exchanger provides improved cooling to outboard marine propulsion units and increases engine life compared with traditional open loop cooling systems, particularly in harsh environments such as salt water, brackish water, swamp, shallow or sediment and debris rich water. The closed loop lower unit heat exchanger also provides improved performance to the outboard marine propulsion system when mounted to an appropriate portion of the lower unit of the outboard marine engine such as the anti-cavitation plate.