A two stage evaporative cooling device has a central chamber, divided into an upper chamber and a lower chamber by a divider. one or more heat exchange units surrounding the central chamber; an upper fan arranged above the upper chamber and a lower fan arranged below the lower chamber; and a water circuit; wherein each heat exchange unit comprises an evaporative cooling element and an air to water pre-cooler, the pre-cooler being placed ahead of a lower portion of the cooling element and the water circuit is arranged to irrigate the cooling element and collect the irrigated water below the cooling element for delivery to the pre-cooler whereby pre-cooled air may be drawn inwardly through the pre-cooler and the lower part of the cooling element by the lower fan and ambient air may be drawn inwardly through the upper part of the cooling element by the upper fan.
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
F24F 1/0011 - Indoor units, e.g. fan coil units characterised by air outlets
A device is disclosed for extracting water from a fluid medium. The water extracting device comprises a primary channel and a quantity of a light-activated, stimulus responsive polymer (SRP) supported on a carrier within the primary channel. The SRP is capable of absorbing a quantity of water from the medium in a first state and releasing the water in a second state and vice versa. An illumination arrangement allows selective exposure of the SRP within the primary channel to electromagnetic radiation to switch the SRP between the first state and the second state whereby water absorbed by the SRP is released. Also disclosed is a method and device for conducting heat from the primary channel to a secondary channel, adjacent to and in heat conducting relation with the primary channel.
B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
A two stage evaporative cooling device has a central chamber, divided into an upper chamber and a lower chamber by a divider, one or more heat exchange units surrounding the central chamber; an upper fan arranged above the upper chamber and a lower fan arranged below the lower chamber; and a water circuit; wherein each heat exchange unit comprises an evaporative cooling element and an air to water pre-cooler, the pre-cooler being placed ahead of a lower portion of the cooling element and the water circuit is arranged to irrigate the cooling element and collect the irrigated water below the cooling element for delivery to the pre-cooler whereby pre-cooled air may be drawn inwardly through the pre-cooler and the lower part of the cooling element by the lower fan and ambient air may be drawn inwardly through the upper part of the cooling element by the upper fan.
A evaporative cooling device is described having a pair of heat conducting plates arranged in spaced, generally parallel relationship with spacing elements separating the plates from one another and defining primary and secondary flow channels between the plates. Inlet ducts are connected to the primary channels and outlet ducts connect from the primary and secondary channels. A water distribution system is also provided to supply water to the secondary channels such that a primary air flow through the primary channels may be cooled by heat conduction along the plates to cause evaporation of the water into a secondary air flow through the secondary channels.
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F28F 3/08 - Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
F28F 13/02 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by influencing fluid boundary
F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
F24F 1/00 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
A device is disclosed for extracting water from a fluid medium. The water extracting device comprises a primary channel and a quantity of a light-activated, stimulus responsive polymer (SRP) supported on a carrier within the primary channel. The SRP is capable of absorbing a quantity of water from the medium in a first state and releasing the water in a second state and vice versa. An illumination arrangement allows selective exposure of the SRP within the primary channel to electromagnetic radiation to switch the SRP between the first state and the second state whereby water absorbed by the SRP is released. Also disclosed is a method and device for conducting heat from the primary channel to a secondary channel, adjacent to and in heat conducting relation with the primary channel.
B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
A system for cooling an outdoor space comprises a main cooling module, a heat rejection module, a water management module, and a control module. The main cooling module comprises an indirect evaporative cooling unit for pre-cooling an intake ambient air to a lower temperature by reducing sensible heat, and a direct evaporative cooling unit having a first evaporative medium for cooling the pre-cooled air (or direct ambient air) through vaporization of water thereby generating a conditioned supply air with a much lower wet bulb temperature than the ambient air. The heat rejection module comprises a second evaporative medium for removing heat contained in the excess water from the indirect evaporative cooling unit thereby producing cool water having a temperature almost equivalent to the intake ambient air wet bulb temperature.
A device for extracting water vapour from a fluid stream includes a carrier structure, a substrate of fibrous material provided on the carrier structure, the fibrous material including a plurality of individual fibres, a quantity of an LCST polymer coating the individual fibres; and a heating provision arranged to selectively heat the LCST polymer to above its lower critical temperature whereby water absorbed by the fibres can be subsequently released on heating. By providing the LCST polymer as a coating onto the fibres, an increased surface area may be achieved.
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 53/28 - Selection of materials for use as drying agents
B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
A heat and moisture exchanger comprises a membrane that is selectively permeable to water vapour, having heat conducting fins attached to both its surfaces. The fins on the first surface are arranged in heat conducting relation with the fins on the second surface for enhancing heat transfer through the membrane. In this manner, a first relatively warm, moist air stream flowing over the first surface can transfer heat and moisture through the membrane to a second relatively cooler and drier air stream flowing over the second surface. By additionally providing the membrane with heat conducting fins, greater thermal or sensible heat transfer can be achieved to and through the membrane.
F24F 3/147 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidificationAir-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification with both heat and humidity transfer between supplied and exhausted air
F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
F28F 13/02 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by influencing fluid boundary
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidificationAir-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
A device is disclosed for extracting water vapour from a fluid stream. The device comprises a carrier structure, a substrate of fibrous material provided on the carrier structure, the fibrous material comprising a plurality of individual fibres, a quantity of an LCST polymer coating the individual fibres; and a heating provision arranged to selectively heat the LCST polymer to above its lower critical temperature whereby water absorbed by the fibres can be subsequently released on heating. By providing the LCST polymer as a coating onto the fibres, an increased surface area may be achieved.
A heat exchange matrix includes a plurality of generally planar foils including a water retaining material, arranged in spaced, substantially parallel relationship. Each foil defines a main plane having a flow direction and a transverse direction and the foils include strips that extend a strip length in the transverse direction and are separated from each neighboring strip in the flow direction and each strip is offset from the main plane by a distance that is different from that of its neighbor. The matrix may be provided in a flow channel for air to be humidified and cooled.
F28C 3/08 - Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour with change of state, e.g. absorption, evaporation, condensation
B23P 15/26 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers
F24F 6/02 - Air-humidification by evaporation of water in the air
B01J 19/32 - Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
B21D 53/04 - Making other particular articles heat exchangers, e.g. radiators, condensers of sheet metal
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidificationAir-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
F28D 19/04 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
B21D 13/00 - Corrugating sheet metal, rods or profiles, or bending sheet metal, rods or profiles into wave form
A heat exchange matrix comprises a plurality of generally planar foils (32, 34) comprising a water retaining material, arranged in spaced, substantially parallel relationship. Each foil (32, 34) defines a main plane (P) having a flow direction (F) and a transverse direction (T) and the foils (23, 34) comprise strips (36a, 36b, 36c) that extend a strip length in the transverse direction (T) and are separated from each neighbouring strip (36a, 36b, 36c) in the flow direction (F) and each strip (36a, 36b, 36c) is offset from the main plane (P) by a distance that is different from that of its neighbour. The matrix may be provided in a flow channel for air to be humidified and cooled.
F28D 19/04 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
B01J 19/32 - Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
B21D 53/04 - Making other particular articles heat exchangers, e.g. radiators, condensers of sheet metal
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidificationAir-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
A heat exchanger (20) comprising: a pair of generally planar, heat conducting plates (10) arranged in spaced, generally parallel relationship; spacing elements (22) separating the plates (10) from one another and defining first (26) and second (28) flow channels between the plates (10) for flow in a first direction and a second direction respectively; wherein the plates (10) in at least the first channel (26) are divided into fins (14), the fins being separated from each other in the first direction and being offset from the plate (10) perpendicular to the first direction to a plurality of offset positions.
F28F 1/12 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidificationAir-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
F28D 5/02 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F24F 1/00 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
A heat exchange system for supplying air to a habitable space at a desired output condition includes a continuously variable mechanical cooler, an indirect evaporative cooler, an adiabatic cooler and a controller arranged to selectively supplement a cooling capacity of the indirect evaporative cooler, with a variable amount of cooling from the mechanical cooler in order to reach the desired output condition.
F25D 3/00 - Devices using other cold materialsDevices using cold-storage bodies
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
A heat exchange system for supplying air to a habitable space at a desired output condition includes a continuously variable mechanical cooler (15), a indirect evaporative cooler (22), an adiabatic cooler (36) and a controller (12) arranged to selectively supplement a cooling capacity of the indirect evaporative cooler, with a variable amount of cooling from the mechanical cooler in order to reach the desired output condition.
A heat exchanger (20) comprising: a pair of generally planar, heat conducting plates (10) arranged in spaced, generally parallel relationship; spacing elements (22) separating the plates (10) from one another and defining first (26) and second (28) flow channels between the plates (10) for flow in a first direction and a second direction respectively; wherein the plates (10) in at least the first channel (26) are divided into fins (14), the fins being separated from each other in the first direction and being offset from the plate (10) perpendicular to the first direction to a plurality of offset positions.
F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
A heat exchanger (1) comprises two interwoven sets of medium throughflow channels which define a primary circuit and a secondary circuit and are in heat-exchanging contact. Extending in each circuit are a number of heat-conducting plates (14) which each extend sealingly through the separating walls (12) and form a monolithic unit with a plate (14) in the other medium circuit. According to the invention successive plates (14) in the flow direction have a mutual distance which is at least three times as great as the length of the upstream plate (14). An undisturbed flow herein flows round the downstream plate (14), whereby a very good heat transfer is obtained between the flow-by air and said plate.
F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
A heat exchanger, compring a primary fluid flow path (19); a secondary fluid flow path (20) adjacent the primary path (19) and isolated therefrom for the purposes of fluid exchange; a first plurality of spaced elongate thermally conductive fins (6) having subsantially U-shaped cross-section, projecting into the primary path (19); and a second plurality of spaced elongate thermally conductive fins (6) having substantially U-shaped cross-section, projecting into the secondary path (20); wherein the first and second plurality of thermally conductive fins (6) are partially nested togehter so that portions of sidewalls of the first plurality of fins (6) and portions of sidewalls of the second plurality of fins (S) are overlapped and held in thermally conductive relationship.
A cooling and ventilation device comprises a product inlet, a product outlet, a waste inlet, a waste outlet, a waste channel connecting the waste inlet to the waste outlet, an evaporative heat exchanger having a primary channel connected between the product inlet and the product outlet and a secondary channel connected between an outlet from the primary channel and the waste channel, a flow control element effective to control flow from the secondary channel to the waste channel and a controller selectively controlling the flow control element to thereby control flow from the secondary channel to the waste channel. The product inlet may be connected to a suitable source of outside air and the product outlet supplied to a habitable space such as the interior of a building or vehicle. The waste inlet may receive expelled air from the habitable space, which is subsequently exhausted to the environment via the waste outlet. In this manner, a device is achieved that can provide all of the benefits of evaporative cooling and ventilation while only requiring two air inlets and two air outlets.
A evaporative cooling device is described having a pair of heat conducting plates (102) arranged in spaced, generally parallel relationship with spacing elements (104) separating the plates (102) from one another and defining primary (l06)and secondary (108) flow channels between the plates. Inlet ducts (114) are connected to the primary (106) channels and outlet ducts connect from the primary (106) and secondary (108) channels. A water distribution system (116) is also provided to supply water to the secondary (108) channels such that a primary air flow (A) through the primary (106) channels may be cooled by heat conduction along the plates (102) to cause evaporation of the water into a secondar air flow (B) throuh the secondary (108) channels.
F28D 5/00 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
