Abstract: A refrigerating system according to the invention includes a refrigerant circuit having at least one compressor, a condenser/gascooler, an intermediate pressure container, at least one evaporator and a respective expansion device before said at least one evaporator, and refrigerant pipes connecting said elements and circulating a refrigerant therethrough; a high pressure regulating device between the condenser/gascooler and the intermediate pressure container, expanding the refrigerant from a high pressure level to an intermediate pressure level; an intermediate pressure sensor sensing the intermediate pressure level; and a control unit controlling the high pressure regulating device. The control unit in operation limits the maximum refrigerant flow through the high pressure regulating device to a maximum flow value FMax, if the sensed intermediate pressure level exceeds a predetermined threshold value PIntTh.

Abstract: A heat exchanger, in particular a charge air cooler or an exhaust gas cooler for an internal combustion engine, comprising a plurality of essentially parallel tubes and at least one collector box on the output side, the tubes each emptying into the collector box on the output side, and a gas flow flowing from the tubes into the collector box and from the collector box into an outlet of the collector box, a structure for interacting with the gas flow being provided at least one of the tubes or collector box, a condensation being transported to the outlet with the aid of the structure.

Abstract: An air temperature and humidity control device using a liquid-desiccant humidity controller thermally coupled to a heat pump is disclosed. The humidity controller may include a contactor having at least one contact module with a porous sidewall that is permeable to water vapor and impermeable to the liquid desiccant. The disclosed device provides air temperature control through heat transfer between the liquid desiccant and heat pump and provides humidity controls through water transfer between the desiccant and surrounding air.

Abstract: A turbulence generator includes a flat plate member (1) having a plurality of through holes (10a), (10b), and pairs of projecting pieces (11, 12) and (13, 14) projecting respectively from upstream-side edges and downstream-side edges of the through holes (10a), (10b), wherein the pairs of projecting pieces (11, 12) and (13, 14) project alternately to front and back surface sides of the flat plate member (1).

Abstract: An air to air heat exchanger includes a first and a second cooling air flow passage extending over a core depth of the heat exchanger. A heated air flow passage is arranged between the cooling air flow passages, and extends over a first percentage of the core depth. Thermally conductive separators are arranged between the heated air flow passage and each of the cooling air flow passages. A first structurally reinforced section is provided between the separators, and extends from a cooling air inlet face in the core depth direction over a second percentage of the core depth. A second structurally reinforced section is provided between the separators, and extends from a cooling air outlet face in the core depth direction over a third percentage of the core depth. The sum of the first, second, and third percentages is greater than 100 percent.

Abstract: A heat pipe includes a reservoir of liquid that is connected to a horizontal portion of the heat pipe via a capillary connection. The heat pipe includes a temperature sensor in proximity to a heat interface in the horizontal portion and a controller that controls a heater for the reservoir. As power into the heat pipe increases, the controller turns on the heater, causing the temperature of the liquid in the reservoir to rise. Liquid then passes from the reservoir through the capillary connection into the horizontal portion, thereby dynamically increasing the amount of liquid in the heat pipe, which increases performance of the heat pipe at higher power levels. When the heater is off, as the heat pipe cools, the liquid condenses and flows back through the capillary connection into the reservoir. The result is a heat pipe that provides demand-based charging of the liquid based on power level.

Abstract: A combination includes a selectively driven fan and a bypass flow passage for bypassing the fan. The bypass flow passage communicates with a first check valve to allow air to flow from the bypass passage to a downstream location. A second check valve allows air driven by the fan to pass into a return passage and return to an inlet of the fan in the event that the discharge pressure from the fan overcomes a spring force associated with the second check valve. A heat exchanger pack and an environmental control system for use on an aircraft, and a method are all also disclosed.

Abstract: A heat pipe includes a reservoir of liquid that is connected to a horizontal portion of the heat pipe via a capillary connection. The heat pipe includes a temperature sensor in proximity to a heat interface in the horizontal portion and a controller that controls a heater for the reservoir. As power into the heat pipe increases, the controller turns on the heater, causing the temperature of the liquid in the reservoir to rise. Liquid then passes from the reservoir through the capillary connection into the horizontal portion, thereby dynamically increasing the amount of liquid in the heat pipe, which increases performance of the heat pipe at higher power levels. When the heater is off, as the heat pipe cools, the liquid condenses and flows back through the capillary connection into the reservoir. The result is a heat pipe that provides demand-based charging of the liquid based on power level.

Abstract: A corrugated fin, in particular for a heat exchanger, having a substantially corrugated design, having a plurality of fin surfaces, wherein adjoining fin surfaces are connected to one another by means of a fin arch in such a way that a medium can flow through an intermediate space between adjoining fin surfaces, wherein the fin surfaces are arranged at an angle with respect to one another perpendicularly with respect to a throughflow direction for the medium, wherein the fin surface has at least one bulge which protrudes out of the plane of the fin surface, wherein the extent of the bulge in a direction perpendicularly with respect to the air throughflow direction is smaller than the extent of the fin surface in said direction.

Abstract: A Non-Isotropic Structure for a Heat Exchanger (NISHEX) that forms fins from nested woven wire meshes. The wire meshes are shaped into channels that are stacked on top of each other to produce a non-isotropic fin structure having multiple fin layers. The fin structure exhibits a high heat coefficient while maintaining relatively high fin efficiency through the selection of fin lengths in proportion to the wire diameter in the mesh fins.

Abstract: A Plate and Shell type plate heat exchanger, which comprises a plate pack, a shell surrounding the plate pack, and end plates mainly in the direction of the ends of the plate pack and inlet and outlet connections for a first heat exchange medium and a second heat exchange medium arranged through the end plate. The plate pack of the heat exchanger is arranged inside the shell in an acentric manner, so that the midpoint of the cross-section of the plate pack deviates substantially from the midpoint of the cross-section of the shell in the vertical direction and/or lateral direction of the cross-section.

Abstract: An indoor unit includes a casing having a suction port formed in an upper part and a blow-out port formed on a lower side at a front face part, an axial-flow or diagonal-flow fan provided on the downstream side of the suction port in the casing, and a heat exchanger provided on the downstream side of the fan and on the upstream side of the blow-out port in the casing, in which air blown out of the fan and refrigerant are heat-exchanged.

Abstract: A thermosyphon heat exchanger includes a plurality of first conduit elements and a plurality of second conduit elements. Each first conduit element has a heat absorbing portion defining a first plane and a first fluid transfer portion defining a second plane. The first plane and the second plane are twisted relative to each other. Each second conduit element has a heat releasing portion and a second fluid transfer portion or a connection to a fluid return line. At least one first conduit element and at least one second conduit element are connected to each other such that the fluid in the thermosyphon heat exchanger can flow in a closed loop through said first conduit element and said second conduit element.

Abstract: A refrigerator and ice making device for producing and releasing clear ice and a method thereof. In an exemplary embodiment, an ice tray of the ice making device may include at least one receiving part that receives water for freezing into the clear ice, the at least one receiving part having an opening provided at a top portion thereof through which the water is supplied and the clear ice is discharged from the at least one receiving part. At least one oscillator may be disposed on the ice tray, the at least one oscillator structured to keep the water moving during the ice production process. The at least one oscillator may also be used to vibrate the ice tray to release the clear ice into a collection tray.

Abstract: Heat transfer plates each include, in a portion thereof forming a heat-exchanging passage, a corrugated portion including a plurality of top parts and a plurality of bottom parts provided alternately from a side thereof having a first inlet toward a side thereof having a first outlet. The heat transfer plate also includes a corrugated portion connected to the corrugated portion, the corrugated portion being provided on a side of a second inlet that faces the heat-exchanging passage. The top parts of the corrugated portion and the top parts of the corrugated portion each have a planar shape. The top parts of the corrugated portion has a larger width than the top parts of the corrugated portion in a direction perpendicular to ridges of the corrugated portions.

Abstract: A heat pipe includes a reservoir of liquid that is connected to a horizontal portion of the heat pipe via a capillary connection. The heat pipe includes a temperature sensor in proximity to a heat interface in the horizontal portion and a controller that controls a heater for the reservoir. As power into the heat pipe increases, the controller turns on the heater, causing the temperature of the liquid in the reservoir to rise. Liquid then passes from the reservoir through the capillary connection into the horizontal portion, thereby dynamically increasing the amount of liquid in the heat pipe, which increases performance of the heat pipe at higher power levels. When the heater is off, as the heat pipe cools, the liquid condenses and flows back through the capillary connection into the reservoir. The result is a heat pipe that provides demand-based charging of the liquid based on power level.

Abstract: A panel, for retaining a heating or cooling tube relative to a substrate, has a standoff extending from a primary flap, wherein the standoff includes a tube contacting surface. A lateral fold extends from the standoff and includes a jaw having a tube retaining surface, wherein the tube contacting surface and the tube retaining surface are located to define a tube retaining channel in a closed position of the jaw. The panel can be formed of a single piece of sheet metal, wherein the sheet metal and configuration of the panel bias the jaw to the closed position.

Abstract: A heat storage system using sand as a solid heat storage medium has a fluidized bed heat exchanger (3) arranged between and separated from a storage tank (1) for cold sand and a storage tank (2) for hot sand by weirs (4, 5). The heat exchanger (3) is divided into a plurality of chambers (7) by weirs (6). The weirs (4, 5, 6) are arranged as a combination of overflow and underflow weirs. Fluidized sand is produced in the chambers (7) by a blower (14) positioned underneath the heat exchanger (3). Heat is transferred from a heat source to the sand fluidized and from the fluidized sand to a heat transport medium by transferring mechanisms (8, 9) in the chambers (7). The sand is redirected in a horizontal direction by horizontally acting blowers and/or installations (12) projecting into a respective chamber from a side.

Abstract: A system and method to control a thermoelectric device using a microcontroller is provided. The system and method include a temperature sensor operatively coupled to a microcontroller that has a central processing unit, at least one memory device, and a module for generating at least one pulse width modulation signal. The at least one pulse width modulation signal generated by the microcontroller has “ON” and “OFF” states to drive the thermoelectric device.

Abstract: A heat exchanger includes a core portion, a pair of header tanks, and an elastically-deformable sealing member. The header tanks are arranged on both end sides of the core portion. The header tank includes a core plate and a resin tank body, which define a tank space. The sealing member is disposed at an end part of the tank body located adjacent to the core plate. The sealing member has a loop shape to enclose the tank space when viewed from the core portion and is formed integrally with the end part of the tank body. The end part of the tank body includes a protrusion portion at least one of inward and outward of the sealing member. The protrusion portion encloses the tank space when viewed from the core portion and projects from the end part of the tank body toward the core plate.