A honeycomb device is provided for heat exchange between first and second fluids at distinguishable temperatures. The device includes first and second fluid intakes, first and second fluid exhausts, first and second capillary arrays, and first, second, third and fourth channels. The first and second fluid intakes respectively receive the first and second fluids. The first and second fluid exhausts respectively discharge the first and second fluids. Each first and second capillary in the arrays are disposed in checkerboard cross-section adjacent arrangement, and preferably have a rhombus cross-section. The first transition channel connects the first fluid intake to the first capillary array. The second transition channel connects the first capillary array to the first fluid exhaust. The third transition channel connects the second fluid intake to the second capillary array. The fourth transition channel connects the second capillary array to the second fluid exhaust.

The invention relates to a heat exchanger apparatus comprising at least one metal sheet (10) (e.g. aluminium), and preferably a plurality in a stack. Each metal sheet (10) has a corrugated surface, with fabric covering at least a portion of one surface of the metal sheet to promote evaporation. A wetting agent (e.g. LiCl/Polyvinyl-Alcohol (PVA) solution) is provided in the fabric to promote wetting of the fabric, and also acts as an anti-microbial agent. The fabric preferably covers all of the corrugated surface, and two planar portions are provided above and below the corrugated surface respectively. In use, the heat exchanger apparatus is disposed with a long side vertical and the corrugated surface is disposed on a middle portion, the upper planar portion is contiguous with an air outlet, and/or the lower planar portion is contiguous with an air inlet. In a preferred embodiment, the corrugated surface has in cross-section a profile of a periodic waveform, wherein the peak-to-peak distance is 11.6 mm, the amplitude is 2.5 mm, and corrugations intersect the plane of the heat exchanger apparatus at an angle to that plane of 50 degrees. Also disclosed are a cooling system incorporating the heat exchanger apparatus and methods of operating the cooling system, involving intermittently operating a water supply system for the application of water to the fabric, and/or, recirculating water from a water sump using the water supply system.

A plate heat exchanger is disclosed herein. In some instances, the plate heat exchanger may be disposed in an ice bin of a beverage dispenser for cooling one or more fluids. The plate heat exchanger may include a top plate, a bottom plate, an outer boundary wall, and a fluid flow path disposed between the top plate and the bottom plate. The fluid flow path may include an inlet and an outlet. A fin may be disposed within the fluid flow path from the top plate to the bottom plate between the inlet and the outlet.

The invention relates to an evaporator-condenser-type heat exchanger comprising a plurality of zones, each zone comprising at least one extractor means configured to channel at least a portion of the primary vapor generated in said zone towards the outside of the heat exchanger. The heat exchanger includes a plurality of sub-assemblies consisting in part of a layer of a thermally conductive material.

The invention relates to an evaporator-condenser-type heat exchanger comprising a plurality of zones, each zone comprising at least one extractor means configured to channel at least a portion of the primary vapor generated in said zone towards the outside of the heat exchanger. The heat exchanger includes a plurality of sub-assemblies consisting in part of a layer of a thermally conductive material.

An apparatus and a process for experimentally determining a heat transfer coefficient of a surface which includes a duct having an outer passage for water flow and an inner passage for air flow, the two passages separated by a thin wall membrane such that the water flow establishes a datum temperature on the thin wall membrane, and where air flowing through the second passage and over the thin wall membrane surface which can include heat transfer enhancements features will be heated by the features, and where the heat transfer coefficient can be determined from the surface temperature of the thin wall membrane and the change in temperature of the air flow. The duct with the thin wall membrane and heat transfer enhancement features is produced using a plastic or metallic additive manufacture process for low cost and quit turnaround time.

A heat exchanger apparatus includes at least one metal sheet with a corrugated surface, fabric covering at least a part of one surface of the at least one metal sheet to promote evaporation, and a wetting agent in the fabric to promote wetting of the fabric, the wetting agent also acting as an anti-microbial agent.

A heat exchanger apparatus includes at least one metal sheet with a corrugated surface, fabric covering at least a part of one surface of the at least one metal sheet to promote evaporation, and a wetting agent in the fabric to promote wetting of the fabric, the wetting agent also acting as an anti-microbial agent.

Enthalpy-exchanging unit comprising at least one plate along whose at least one contact side a first flowable medium and a second medium can travel while exchanging enthalpy, and which enthalpy-exchanging unit comprises at least one hygroscopic material layer, which connects to at least one contact side, in contact with the first flowable medium, of the plate, wherein the mutual orientation of the plate and the material layer is such that a liquid film of the first medium can form between the plate and the material layer, wherein the liquid film is in enthalpy-exchanging contact with both the plate and the material layer, characterized in that the material layer is fastened to the plate with a plurality of seams, which extend substantially parallel to one another and are continuous, such that a plurality of channels separated from one another by the seams are formed over the contact side of the plate, with the aim of increasing the degree of spread of the first flowable medium over the contact side of the plate, and thus, on the one hand, reducing the influence of cohesion between the liquid molecules and the accompanying surface tension and, on the other hand, increasing the influence of the adhesion between the flowable medium and the plate, wherein an more even liquid supply without the use of nozzles is secured, by on the top side a supply unit provided with a porous, absorbent bed.

A reliable, leak-tolerant liquid cooling system with a backup air-cooling system for computers is provided. The system may use a vacuum pump and a liquid pump and/or an air compressor in combination to provide negative fluid pressure so that liquid does not leak out of the system near electrical components. Alternatively, the system can use a single vacuum pump and a valve assembly to circulate coolant. The system distributes flow and pressure with a series of pressure regulating valves so that an array of computers can be serviced by a single cooling system. A connector system is provided to automatically evacuate the liquid from the heat exchangers before they are disconnected. Leah detection and mitigation structures are also disclosed. Various turbulators are also provided, as well as a system and method for optimizing the heat transfer characteristics of a heat exchanger to minimize total energy requirements.