A heat exchanger (10) of heat pipe configuration for transferring heat between a first and second process streams via a heat transfer fluid comprises: at least one first process stream passage (19); at least one second process stream passage (29); and a shell (11) enclosing the first and second process stream passages (19, 29) within a volume (55). The volume (55), as a result of a heat transfer process, is fully filled with both vapour and liquid phases of the heat transfer fluid. The first and second process stream passages (19, 29) are spaced by a disengagement zone (50) enabling gravitational separation of said vapour and liquid phases and limiting accumulation of liquid phase heat transfer fluid about the first process stream passage(s) (19). Such heat exchangers can be used, among other applications, to replace a flash cooling stage in a Bayer process plant.

An auxiliary multi-pass tube bundle heat exchanger for improving the melting efficiency of melter kettles used to melt thermoplastic pavement marking materials. The auxiliary multi-pass tube bundle heat exchanger includes a heat transfer tube bundle having a plurality of heat transfer tubes in which the flow of molten thermoplastic material reverses directions at least once. Hot heat transfer oils flows around the plurality of heat transfer tubes. Molten thermoplastic material is pumped from the bottom of a melter kettle, through the auxiliary multi-pass tube bundle heat exchanger and to the top of the melter kettle. A drainage system is provided to drain molten thermoplastic material and any settled glass beads form the auxiliary multi-pass tube bundle heat exchanger and a purging system is provided to purge molten thermoplastic material form the auxiliary multi-pass tube bundle heat exchanger using compressed air.

A plant or refinery may include equipment such as reactors, heaters, heat exchangers, regenerators, separators, or the like. Types of heat exchangers include shell and tube, plate, plate and shell, plate fin, air cooled, wetted-surface air cooled, or the like. Operating methods may impact deterioration in equipment condition, prolong equipment life, extend production operating time, or provide other benefits. Mechanical or digital sensors may be used for monitoring equipment, and sensor data may be programmatically analyzed to identify developing problems. For example, sensors may be used in conjunction with one or more system components to detect and correct maldistribution, cross-leakage, strain, pre-leakage, thermal stresses, fouling, vibration, problems in liquid lifting, conditions that can affect air-cooled exchangers, conditions that can affect a wetted-surface air-cooled heat exchanger, or the like. An operating condition or mode may be adjusted to prolong equipment life or avoid equipment failure.

A laser weapon system is described. Particularly, embodiments describe subsystems of a laser weapon system including those necessary for laser generation, operational control, optical emission, and heat dissipation configured to provide a lightweight unit of reduced dimensions.

A cathode gas cooling system provided with a heat exchanger having first internal channels into which cathode gas flows and second internal channels to which water discharged from a fuel cell is supplied and cooling cathode gas flowing through the first internal channels by latent heat of vaporization of water flowing through the second internal channels. The first internal channels and second internal channel are are respectively made independent channels inside the heat exchanger so that steam produced inside the second internal channels by heat exchange with cathode gas flowing through the first internal channels does not flow into the first internal channels.

A heat exchanger for a heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a shell having an inlet configured to receive refrigerant and an outlet configured to output the refrigerant. The heat exchanger also includes a refrigerant distributor disposed within the shell, and multiple evaporating tubes disposed within the shell and positioned below the refrigerant distributor. The refrigerant distributor includes a perforated plate having multiple holes, each hole extends from a top surface of the perforated plate to a bottom surface of the perforated plate, and a center point of each hole is substantially aligned with a centerline of a respective evaporating tube.

The heat exchanger includes at least one tube array in which refrigerant flows, the tube array includes a plurality of tubes each having a channel formed therein, and connection members coupled to opposite ends of the tubes so as to interconnect the tubes, and the tubes are injection molded integrally with the connection members.

The present invention relates to a heat exchanger enabling the reduction of the number of components constituting the heat exchanger, the simplification of the coupling structure thereof, and also, the decrease of combustion gas flow resistance and the minimization of noise and vibration generation, the heat exchanger being provided with a heat exchange unit having heating medium flow channels through which a heating medium flows and combustion gas flow channels through which combustion gas combusted in the burner flows to be alternately formed and adjacent to each other in spaces between a plurality of plates, wherein the heat exchange unit comprises: a sensible heat unit which surrounds the outer side of a combustion chamber, is formed of one side area of the plates, and heats the heating medium by using sensible heat of combustion gas generated by the combustion of the burner; and a latent heat unit which is formed of the other side area of the plates, and heats the heating medium by using latent heat of water vapor included in combustion gas that has finished undergoing heat exchange in the sensible heat unit, wherein bent flange units are formed on the edges of the plurality of plates, and in a state where the flange units of neighboring plates overlap, certain areas among the edges of the plurality of plates have formed thereon combustion gas pass-through units having combustion gas flowing through the combustion gas flow channels pass therethrough.

A lifetime diagnosis component for anticorrosive coating includes a plate-shaped base member having an aluminum layer on a surface thereof; and a sacrificial anode layer portion formed of zinc on the base member. The surface of the base member has a base-member exposing portion where the aluminum layer is exposed.

A channel forming body for mounting semiconductor power modules or a heat sink for power modules has a heat-transfer portion having a very complicated construction in order to increase the heat-transfer coefficient, leading to need for extremely high techniques and high cost for manufacturing. By arranging an expanded metal 13 in a channel 12 formed to lie between two planes 11 and 11 placed face-to-face, local fluid flows 16 guided by the expanded metal 13 are allowed to act on various boundary layers 15 formed between these two planes 11 and 11 and a fluid so as to improve fluid flow characteristics concerning heat transfer and/or mass transfer through a local turbulent flow acceleration effect.