Heat exchangers include at least one looped tube having at least one section that is laterally offset from another section of the looped tube. Fluid cooling systems and seal systems may include such heat exchangers.

A heat exchanger may comprise a primary fluid path comprising an outer shell enclosing a primary cavity through which a primary fluid may flow; and a secondary fluid path coupled to the primary fluid path comprising a secondary fluid supply conduit, a secondary fluid exit conduit, and a first heat transfer element coupled fluidly between the secondary fluid supply conduit and the secondary fluid exit conduit, wherein the secondary fluid path is configured such that a secondary fluid may flow through the secondary fluid supply conduit, the first heat transfer element, and the secondary fluid exit conduit, which are in fluid communication with one another. The first heat transfer element, and additional heat transfer elements, may be disposed in the primary cavity such that the primary fluid contacts a secondary outer shell of the first heat transfer element.

A heat storage and transfer system incorporates a primary heat storage chamber that is thermally insulated and which in use, contains a heat storing liquid or solid and a thermal energy to electrical energy converter in or thermally coupled to at least one of: i) a secondary chamber external to and adjacent the primary heat storage chamber through which a liquid or steam to be heated is passed in use; and ii) a thermal conduction plate/surface external to the thermally insulated primary heat storage chamber or body. The system has a heat transfer feature to selectively transfer thermal energy from the heat storing liquid or solid of the primary heating chamber to the thermal conduction plate or the liquid or steam to be heated in the secondary chamber for the thermal energy to thence be converted to electrical energy by the thermal energy to electrical energy converter.

A metal heat storage apparatus comprises a metal heat storage medium, a medium insertion chamber insulating the inner side, outer side and the floor of the metal heat storage medium; an outer wall structure made of concrete further insulating the metal heat storage medium and including a floor, a central column, an outer wall body, and an upper cover; an infrared ray reflecting mirror disposed below the upper cover constituting the outer wall structure and reflecting infrared rays generated from the metal heat storage medium; a heat exchanger spirally disposed inside the metal heat storage medium and including supply and drain tubes exposed to the outside of the outer wall structure; a solar heater buried in the metal heat storage medium; and a high-density optical input port passing through the outer wall body and the insulating outer wall to provide solar energy to the solar heater.

Heat exchangers include at least one looped tube having at least one section that is laterally offset from another section of the looped tube. Fluid cooling systems and seal systems may include such heat exchangers.

A conical refrigerant coil comprises a plurality of pipes, each pipe arranged in a conical spiral and each pipe comprising a plurality of loops. At least some of the loops of each pipe of the plurality of pipes are arranged alternatingly along at least a portion of a length of the coil.

Heat exchangers include at least one looped tube having at least one section that is laterally offset from another section of the looped tube. Fluid cooling systems and seal systems may include such heat exchangers.

Heat exchanger designs incorporating helixes and methods for making heat exchangers incorporating helixes are provided herein. In preferred embodiments, the heat exchanger comprises a plurality of fluid A channels each formed from a tube spiraled into a helix to form a plurality of helixes wherein the plurality of helixes are arranged in a hexagonal packing arrangement in a packing plane perpendicular to the axes of rotation of the plurality of helixes and wherein the pitch of each helix in the plurality of helixes is matched to an exterior diameter of the tube such that each helix in the plurality of helixes has a sealed interior that forms a plurality of fluid B channels.

A cooling system for a vehicle includes a fan rotor having a conical shape and a plurality of fan blades and a heat exchanger having a conical shape. The fan rotor is configured to discharge air in a predetermined direction which includes an axial direction component and a radial direction component. In a further aspect, a vehicle cooling system includes a fan rotor including a plurality of fan blades; and a heat exchanger having a cylindrical shape. The fan rotor is configured to discharge air in only a radial direction.

A cooling system for a vehicle includes a fan rotor having a conical shape and a plurality of fan blades and a heat exchanger having a conical shape. The fan rotor is configured to discharge air in a predetermined direction which includes an axial direction component and a radial direction component. In a further aspect, a vehicle cooling system includes a fan rotor including a plurality of fan blades; and a heat exchanger having a cylindrical shape. The fan rotor is configured to discharge air in only a radial direction.