Abstract: A cooling device for cooling at least two power electronic devices by a working fluid. The cooling device has a heat receiver portion of the Pulsating Heat Pipe circuit system and a pair of thermo-conducting walls provided on mutually opposite sides of the heat receiver arrangement and sandwiching the heat receiver portion between them. These walls are adapted for being thermally connected to a respective one of the power electronic devices. The cooling device further has a heat dissipator arrangement with a heat dissipator portion of the Pulsating Heat Pipe circuit system and a plurality of fins thermally coupled to the heat dissipator portion for transferring heat from the heat dissipator portion to an external cooling fluid for cooling the working fluid in the heat dissipator portion.

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: The invention relates to a heat exchanger comprising a base plate for receiving a heat load from one or more electric components, an evaporator being in thermal contact with a surface of the base plate for transferring said heat load into a first fluid in the evaporator channels, and a condenser dissipating heat from the first fluid. In order to provide an efficient heat exchanger the heat exchanger comprises a collector space receiving first fluid from the condenser, and the collector space which is located higher than the lower ends of the evaporator channels is in fluid communication with lower ends of the evaporator channels for passing first fluid received from the condenser to the lower ends of the evaporator channels.

Abstract: The invention relates to a cooling element (11) comprising: a fluid channel (1) providing a pulsating heat pipe, a first evaporator (14) for receiving heat from electric components (15) and for passing the heat into fluid in the fluid channel (1), and a first condenser (18) for receiving fluid from the first evaporator (14) via the fluid channel (1) and for cooling fluid in the fluid channel. In order to obtain an even temperature distribution at the first evaporator (14) an adiabatic zone where the temperature of the fluid in the fluid channel (1) remains unchanged or a cooling zone, with a second condenser (20) cooling fluid in the fluid channel (1), separates the first evaporator (14) from the loops (6) in the second end (12) of the fluid channel.

Abstract: An exemplary heat exchanger is configured for removing heat energy from a heat generator. The heat exchanger including at least one conduit for a working fluid, which is arranged in an upright position of at least 45°, each conduit having an exterior wall and at least one interior wall for forming at least one evaporator channel and at least one condenser channel within the conduit. Furthermore, the heat exchanger includes a first heat transfer element for transferring heat into the evaporator channel and a second heat transfer element for transferring heat out of the condenser channel.

Abstract: It is proposed a two-phase heat exchanger device for a power-electronic module arrangement having a semiconductor module. The two-phase heat exchanger device includes a base plate configured for being in contact with a first semiconductor module at a first side of the base plate; and at least one tube element for a first cooling medium including a first portion having at least one evaporator channel and a second portion having at least one condenser channel. The base plate has a groove containing the tube element, wherein the groove is dimensioned for enabling thermal contact between the base plate and the first portion of the tube element and dimensioned to form a gap between the base plate and the second portion of the tube element for thermal separation of the base plate and the second portion of the tube element.

Abstract: A power device comprises at least one power semiconductor module comprising a wide bandgap semiconductor element; and a cooling system for actively cooling the wide bandgap semiconductor element with a cooling medium, wherein the cooling system comprises a refrigeration device for lowering a temperature of the cooling medium below an ambient temperature of the power device; wherein the cooling system is adapted for lowering the temperature of the cooling medium in such a way that a temperature of the wide bandgap semiconductor element is below 100° C.

Abstract: The invention relates to an apparatus (1) comprising a generator (5), an evaporator (6), an absorber (8) and a condenser (9) circulating a refrigerant (R), an inert (I) and an absorbent (A) in a diffusion-absorption cycle. The generator (5) and the evaporator (6) are arranged in an electric cabinet (2) to receive a heat load from primary electric components (3) and secondary electric components (4). The absorber (8) and the condenser (9) are arranged outside of the electric cabinet (2) and at a higher level than the evaporator (6) to receive fluid from the generator (5) and the evaporator (6) and for dissipating heat from the received fluid to the surrounding environment. The inert (I) and refrigerant (R) are selected such that the inert (I) is heavier than the refrigerant (R) in order to obtain fluid circulation where the inert (I) exiting the absorber (8) flows downwards to the evaporator (6) and the inert (I) exiting the evaporator (6) flows upwards to the absorber (8).

Abstract: It is proposed a two-phase heat exchanger device for a power-electronic module arrangement having a semiconductor module. The two-phase heat exchanger device includes a base plate configured for being in contact with a first semiconductor module at a first side of the base plate; and at least one tube element for a first cooling medium including a first portion having at least one evaporator channel and a second portion having at least one condenser channel. The base plate has a groove containing the tube element, wherein the groove is dimensioned for enabling thermal contact between the base plate and the first portion of the tube element and dimensioned to form a gap between the base plate and the second portion of the tube element for thermal separation of the base plate and the second portion of the tube element.

Abstract: The invention relates to a cooling apparatus, comprising a first evaporator section with first channels, and a first condenser section with second channels. In order to provide adequate cooling for electric components the cooling apparatus further comprises a second evaporator section with third channels, and a base plate with a first surface for receiving a heat load from electric components. The first condenser section is in fluid communication with the second evaporator section for receiving fluid from the second evaporator section, for passing heat from the fluid to surroundings and for returning fluid to the second evaporator section.

Abstract: An exemplary evaporating unit for cooling a heat emitting device includes a cooling circuit having a stack of evaporating units arranged alternately with heat emitting devices. Each evaporating unit is connected to a condenser and includes a first inlet channel, a first plurality of evaporation channels, and a first outlet channel. The evaporating unit is designed for pre-heating the cooling fluid flowing therein.

Abstract: A cooling device for cooling at least two power electronic devices by a working fluid. The cooling device has a heat receiver portion of the Pulsating Heat Pipe circuit system and a pair of thermo-conducting walls provided on mutually opposite sides of the heat receiver arrangement and sandwiching the heat receiver portion between them. These walls are adapted for being thermally connected to a respective one of the power electronic devices. The cooling device further has a heat dissipator arrangement with a heat dissipator portion of the Pulsating Heat Pipe circuit system and a plurality of fins thermally coupled to the heat dissipator portion for transferring heat from the heat dissipator portion to an external cooling fluid for cooling the working fluid in the heat dissipator portion.

Abstract: A cooling assembly comprising a plurality of fin elements stacked in a stack direction, a plurality of coolant channels each located between adjacent fin elements and extending in a coolant channel direction perpendicular to the stack direction, a first heat transfer surface adapted to be in contact with a heat generating element, and a second heat transfer surface spaced apart from the first heat transfer surface, the plurality of fin elements and the plurality of coolant channels being located between the first heat transfer surface and the second heat transfer surface. Each of the fin elements comprises a pulsating heat pipe embedded therein, a main pulsating direction of each of the pulsating heat pipes being substantially parallel to a normal of the first heat transfer surface.

Abstract: An arrangement for cooling a closed, sealed cabinet (1), comprising a thermosiphon heat exchanger (2) disposed inside the cabinet (1) and having an evaporator (3) and a condenser (4) for circulating a working fluid between the evaporator (3) and the condenser (4) in a closed loop, wherein the working fluid evaporated in the evaporator (3) by heat flows to the condenser (4) for cooling and the condensed working fluid flows back to the evaporator (3). The evaporator (3) is exposed to hot air flow generated inside the cabinet (1), and a heat transfer element (5) is attached to the condenser (3) in a sealed manner through a cabinet wall (6) for transferring heat to the outside of the cabinet (1).

Abstract: The invention relates to a heat exchanger comprising a base plate for receiving a heat load from one or more electric components, an evaporator being in thermal contact with a surface of the base plate for transferring said heat load into a first fluid in the evaporator channels, and a condenser dissipating heat from the first fluid. In order to provide an efficient heat exchanger the heat exchanger comprises a collector space receiving first fluid from the condenser, and the collector space which is located higher than the lower ends of the evaporator channels is in fluid communication with lower ends of the evaporator channels for passing first fluid received from the condenser to the lower ends of the evaporator channels.

Abstract: This invention relates to a cooling apparatus comprising a base plate, an evaporator and a condenser. In order to obtain a simple and efficient cooling apparatus the evaporator is a porous aluminum evaporator having a capillary structure with pores and a plurality of larger sized evaporator channels extending through the evaporator between a second end and the first end of the evaporator. A compensation chamber extending along a second surface of the evaporator receives first fluid from the condenser such that pores opening up into the second surface of the evaporator are provided with first fluid.

Abstract: Exemplary embodiments relate to a system and method for monitoring functional operational reliability of a cooling system having at least one thermosyphon for transformers provided with at least one evaporator and with at least one condenser. The cooling system using a coolant which can be vaporized and a gaseous medium, as a heat carrier.

Abstract: An exemplary modular cooling system for cooling a plurality of electronic components is provided. The cooling system includes a plurality of cooling modules and a clamping arrangement. Each cooling module includes an evaporator unit, a condenser, a first pipe system, and a second pipe system. The clamping arrangement is adapted for holding and pressing an alternation stack in which the evaporator units are stacked in alternation with the power electronic components.

Abstract: A heat exchange device may be based on a pulsating heat pipe and a cooling arrangement. The heat exchange device may include a plurality of pipes to provide fluid paths between a first fluid distribution element and a second fluid distribution element. Each pipe of the plurality of pipes may include a group of channels. Each of the first and second fluid distribution elements may include a plate of a first type. Each plate of the first type may include openings for providing alignment functionality for the plurality of pipes. The first fluid distribution element may include a plate of a second type that may include openings for providing fluid paths between the pipes. The plate of the second type may be positioned on a side of the plate of the first type of plates of the first fluid distribution element that is opposite to the second fluid distribution element.

Abstract: This invention relates to a cooling apparatus comprising a first cooling element (5) with first channels (6) extending between a first manifold (1) and a second manifold (2) and with a base plate (9) with a first surface (10) for receiving a heat load from an electric component (11), and a second cooling element (14) with second channels (16) extending between a third manifold (3) and a fourth manifold (4). A first section (21) of the second cooling element (14) is provided with openings (19) for allowing an airflow (18) to pass through the first section (21). The second cooling element (14) comprises a second section (22) provided with openings (19), and the cooling apparatus is configured to conduct the airflow (18) which has passed through the first section (21) through the openings (19) of the second section (22).