Described are a high pressure carbamate condenser, urea plant, and urea production process. The high pressure carbamate condenser as described is of the shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.

A heat exchanger includes a first-row heat exchange module through which a refrigerant is introduced from the outside, a second-row heat exchange module through which the refrigerant is discharged to the outside, a third-row heat exchange module through which the refrigerant is discharged to the outside, and a flow-splitting module that splits the refrigerant from the first-row heat exchange module into the second-row heat exchange module and the third-row heat exchange module, wherein the refrigerant reciprocates one time in a flow path, the first-row heat exchange module constitutes a forward path of the flow path, and both the second-row heat exchange module and the third-row heat exchange module constitute backward paths of the flow path.

A liquid cooling device includes a water tank structure having parallel and separated first and second water tanks. The heat dissipation structure is installed between the first and second water tanks and the three are coupled to each other to form a curved cooling water passage. A mounting portion is formed in the gap between the heat dissipation structure and the first and second water tanks in the extension direction of the heat dissipation structure and the first and second water tanks. Both of the pumping structure and the endothermic structure are coupled to the first and second water tanks. The pumping structure and the endothermic structure are installed in at least one mounting portion and the pumping structure drives a working fluid to flow back and forth between the first water tank, the heat dissipation structure and the second water tank in the curved cooling water passage sequentially.

A refrigerant heat exchanger including a first group of heat exchange tubes on a first side of a core defining a first zone. A second group of heat exchange tubes on a second side of the core define a second zone. An inlet tank is at the inlet end of the core. An inlet port of the inlet tank is opposite to, or generally opposite to, an interface between the first zone and the second zone. A first outlet tank is at the outlet end of the core opposite to the first zone. A first outlet port of the first outlet tank is at an outer end of the first outlet tank. A second outlet tank is at the outlet end of the core opposite to the second zone. A second outlet port of the second outlet tank is at an outer end of the second outlet tank.

A diffuser plate for a thermal transfer device can include a body having a number of first apertures and a second aperture that traverse therethrough, where the first apertures are asymmetrically arranged with respect to the second aperture. The first apertures can have a first shape and a first size, and where the first apertures are configured to receive a plurality of tubes. The second aperture has a second size, where the second size is larger than the first size.

A micro channel type heat exchanger in which a first heat exchange module and a second heat exchange module are stacked, the micro channel type heat exchanger including a plurality of flat tubes disposed within the first heat exchange module and the second heat exchange module, and a heat blocking member configured to form a heat blocking space by separating the first heat exchange module and the second heat exchange module, wherein the heat blocking member forms a heat blocking space between the first heat exchange module and the second heat exchange module that minimizes heat conductivity and improves thermal exchange performance of the heat exchanger.

Disclosed is a multi-loop plate heat exchanger, including: a plurality of heat exchange plates arranged in a stacked manner; heat exchange channels formed between adjacent heat exchange plates in the plurality of heat exchange plates; and port channels extending through the heat exchange plates and respectively used for inflow and outflow of a heat exchange medium, at least one of the port channels including at least two fluid channels which are separated from each other and used for inflow or outflow of at least two of multiple loops of refrigerant. The at least two fluid channels share one of the port channels, and the at least two fluid channels are arranged side by side in the radial direction of the port channel.

A multitubular rotary heat exchanger has a stationary shielding unit. The shielding unit is positioned in close proximity to a tube plate outside a heating or cooling region. A stationary surface of the shielding unit is positioned in opposition to and in close proximity to an end opening of a heat transfer tube moving in an upper zone of the heating or cooling region, thereby transiently reducing or restricting the flow rate of the thermal medium fluid flowing through the heat transfer tube moving in the upper zone.

Thermal energy storage systems are disclosed in this application. Systems of the inventive subject matter are designed to reduce maintenance requirements by sequestering, for example, corrosive fluids that might otherwise damage difficult-to-fix internal components are kept out of those components by introducing a non-corrosive heat transfer fluid to facilitate heat transfer between a thermal energy storage medium (e.g., molten sulfur) and a potentially corrosive working fluid. Thus, the potentially corrosive fluid is kept out of a thermal energy storage tank containing the thermal energy storage medium, which, by design, is difficult to repair when internal components corrode or otherwise require maintenance.

A heat exchanger includes: tubes stacked in a stacking direction, through which fluid flows; and a tank having a core plate to which each of the tubes is connected. The tank has a first space and a second space separated from each other and arranged in the stacking direction to store fluid. The core plate has insertion holes arranged in the stacking direction, through which the tubes are respectively inserted. The core plate has a boundary portion opposing a boundary between the first space and the second space. The core plate has a rigid portion that overlaps at least one of the insertion holes at a position adjacent to the boundary portion so as to increase a rigidity of the core plate.