A heat dissipation assembly includes a case and a partition structure. The case has a chamber. The partition structure includes a partition wall vertically disposed in the chamber to separate a first flow path and a second flow path in the chamber, and the partition wall has a breach and a valve structure disposed at the breach, wherein the valve structure covers the breach when the valve structure is not pushed open. When a fluid pressure existed in a section of one of the first flow path and the second flow path which is adjacent to the valve structure is greater than a fluid pressure existed in a section of the other one of the first flow path and the second flow path which is adjacent to the valve structure, the valve structure is pushed away to expose at least a part of the breach.

A heat exchange core according to an embodiment includes a plurality of first layers including a plurality of first flow paths, a first header connected to the plurality of first flow paths, and a plurality of second layers including a plurality of second flow paths and disposed alternately with the first layers in a layering direction. The first header includes a first main header extending in the layering direction and a first sub header provided on each of the plurality of first layers and connected to the first main header. End portions of some of the plurality of first flow paths are connected to the first main header, and end portions of a remainder of the plurality of first flow paths are connected to the first sub header.

A system for energy conversion, the system including a closed cycle engine containing a volume of working fluid, the engine comprising a first chamber defining an expansion chamber and a second chamber defining a compression chamber each separated by a piston attached to a connection member of a piston assembly, and wherein the engine comprises a heater body in thermal communication with the first chamber, and further wherein the engine comprises a cold side heat exchanger in thermal communication with the second chamber, and wherein a third chamber is defined within the piston, wherein the third chamber is in selective flow communication with the first chamber, the second chamber, or both.

There is disclosed a heat exchanger comprising at least one set of channels having a proximal end and a distal end, the set of channels comprising: a first channel defined by a first skin and a wall; and a second channel defined by a second skin and the wall, wherein the wall located between the first channel and the second channel comprises a first at least one aperture to allow fluid to pass through the wall from the first channel to the second channel.

An energy conversion apparatus may include an engine assembly, such as a monolithic engine assembly, that includes a first heater body and a first engine body. The first heater body may define a first portion of a first monolithic body or at least a portion of a first monolithic body-segment. The first engine body may define a second portion of the first monolithic body or at least a portion of a second monolithic body-segment operably coupled or operably couplable to the first heater body. The engine assembly may include a second heater body and/or a second engine body. The second heater body may define a portion of a second monolithic body or a third monolithic body-segment. The second engine body may define a portion of the second monolithic body or a fourth monolithic body-segment operably coupled or operably couplable to the second heater body and/or the first engine body.

A monolithic combustor body may provide multi-stage combustion. A combustor body may include a combustion chamber body and a plurality of heating walls that include a heat sink. The combustion chamber body may be disposed annularly about a longitudinal axis and defining a combustion chamber. The plurality of heating walls may include heat sink. The plurality of heating walls may occupy a radially or concentrically outward position relative to the combustion chamber and may define a corresponding plurality of combustion-gas pathways fluidly communicating with at least a proximal portion of the combustion chamber. During operation, the combustor body may exhibit multi-stage combustion that includes a first combustion zone occupying a distal or medial position of the combustion chamber relative to the longitudinal axis, and a second combustion zone occupying a proximal position relative to the first combustion zone and a radially or concentrically outward position of the combustion chamber and/or a radially or concentrically inward position of the plurality of combustion-gas pathways.

Heat exchanger (100) for heat exchange between a first medium and a second medium, comprising a main inlet (101) and a main outlet (102) for the first medium; and a plurality of heat exchanging plates (110), each of which comprising a plate inlet (111) and a plate outlet (112) for the first medium; and a respective first heat transfer surface (114) on a first side (113) and arranged to be in contact with the first medium flowing along said first side; a respective second heat transfer surface (116) on a second side (115) and arranged to be in contact with the second medium flowing along said second side; a respective plurality of indentations (120,130,140); wherein the plates are fastened together in a stack, comprising plates of a first type (104a) and plates of a second type (104b) arranged alternatingly, whereby corresponding ones of said indentations of adjacent plates are arranged in direct abutting contact with each other, so that flow channels (105′,105″,106) for said first and second media are formed between said surfaces. The invention is characterised in that each plate of the first type comprises a respective ridge-shaped indentation (120), arranged to form a closed flow first medium channel (105′,105″), in that each plate of the first type comprises a respective bridge-shaped indentation (130), formed to comprise a through hole (132a,132b) arranged to form an open flow channel (106) for the second medium, and in that said open flow channel communicates with corresponding open flow channels between other pairs of first and second type plates.

A cross-over fluid coupling includes a first coupling end and a second coupling end. A plurality of first conduits have inner ends disposed toward the first coupling end and outer ends spaced apart from the inner end toward the second coupling end and being outboard of the inner end. A plurality of second conduits have outer ends that are disposed toward the first coupling end and positioned laterally outboard of the inner end of at least one of the first conduits, and inner ends that are spaced apart from the outer end toward the second coupling end in the axial direction and is laterally inboard of the outer end of the at least one of the first conduits.

A constant density heat exchanger is provided. The constant density heat exchanger includes a housing extending between a first end and a second end and defining a chamber having an inlet and an outlet. A first flow control device is positioned at the inlet of the chamber and movable between an open position in which a working fluid is permitted into the chamber and a closed position in which the working fluid is prevented from entering the chamber. A second flow control device is positioned at the outlet of the chamber and movable between an open position in which the working fluid is permitted to exit the chamber and a closed position in which the working fluid is prevented from exiting the chamber. A heat exchange fluid imparts thermal energy to the volume of working fluid held at constant density within the chamber by the first and second control devices.

A vehicle condenser which has a substantially parallelepipedic shape and stacked plates, which are parallel to a substantially vertical plane and define alternate coolant chambers and refrigerant chambers between each other. The vehicle condenser is divided into three consecutive groups of refrigerant chambers and includes at least one combination, on one side of the vehicle condenser, of a larger refrigerant outlet, that leads a main flow of refrigerant from one group of refrigerant chambers to a larger refrigerant inlet of a following group of refrigerant chambers, and, vertically opposite to the larger refrigerant outlet, a smaller refrigerant outlet, that leads a residual flow of refrigerant from the one group of refrigerant chambers to a smaller refrigerant inlet of the following group of refrigerant chambers.