An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

A heat exchanger core includes a core formed such that a pair of adjacent passages are folded on top of one another while being adjacent. At least one passage of the pair of adjacent passages has a pair of adjacent passage portions between which the other passage is not interposed in a direction in which the passages lie on top of one another. The core has a heat insulation layer between the pair of passage portions.

A heat exchanger includes a core and a header tank. The header tank includes a partition, a first inlet pipe, and a second inlet pipe. The partition divides an inside passage of the header tank into a first tank and a second tank. The first inlet pipe introduces a first fluid into the first tank. The second inlet pipe introduces a second fluid into the second tank. The first inlet pipe is inclined at a predetermined angle except a right angle relative to an outer surface of the header tank such that a flow direction of the first fluid flowing from the first inlet pipe to the first tank includes a component in a predetermined direction from a first end of the first tank provided with the partition to a second end of the first tank opposite to the first end.

An embodiment integrated radiator includes an upper section including an upper tube, a first upper tank, a first upper header, a second upper tank, and a second upper header, wherein the upper tube is configured to pass an upper-side coolant therethrough, a lower section including a lower tube, a first lower tank, a first lower header, a second lower tank, and a second lower header, wherein the lower tube is configured to pass a lower-side coolant therethrough, and a middle section disposed between the upper section and the lower section, the middle section including a middle tube, a first middle tank, a first middle header, a second middle tank, and a second middle header, wherein the middle tube is configured to receive a cooling medium therein.

An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

An HVAC heat exchanger with an array of tubes including one or more dead tubes is provided. In one embodiment, the heat exchanger is a microchannel heat exchanger operable to exchange heat with air in an HVAC system via refrigerant passing through the microchannel heat exchanger. The microchannel heat exchanger includes an array of flat tubes arranged between a first manifold and a second manifold. The array of flat tubes includes multiple tubes coupled in fluid communication with the first manifold and the second manifold to convey refrigerant between the first manifold and the second manifold through microchannels of the multiple tubes. The array of flat tubes also includes one or more dead tubes that do not convey refrigerant between the first manifold and the second manifold. Additional systems, devices, and methods are also disclosed.

Thermal energy storage and heat exchanger, distinctive in that it comprises: a number of hardened concrete thermal energy storage elements; a housing, into which said elements have been arranged; an active heat transfer and storage medium in the volume between said elements and said housing, in the form of either: a stagnant liquid or phase change material, or a dynamic fluid arranged to flow in the volume between said elements and said housing; at least one means for delivery of thermal energy to the thermal energy storage; at least one means for taking out thermal energy from the thermal energy storage; and thermal insulation.

A flat plate heat exchanger module for use in aerospace applications, automotive applications, industrial applications or similar. The flat plate heat exchanger module comprises a stack of heat exchanger plates, where at least one of the heat exchanger plates further comprises at least one elongated aperture extending across the surface of the heat exchanger plate. This elongated aperture is in fluid isolation from the fluid flowing across the surface of the heat exchanger plate. The use of at least one elongated aperture throughout the stack of heat exchanger plates minimises the overall effect of the expansion and contraction of the metal due to exposure to high temperature gradients. A method of manufacturing such a heat exchanger module is also provided.

Heat exchanger comprising a pair of headers and a plurality of parallel and coplanar tubes interconnecting the headers, wherein each header comprises a header plate provided with a plurality of slots, in each of which an end of a respective tube is fitted, and wherein the heat exchanger is configured to prevent fluid from flowing into at least one tube, hereinafter dummy tube, arranged at a boundary between functionally different sections of the heat exchanger. The slot of the header plate which receives the end of the respective dummy tube is formed as a blind recess in the header plate.

An exhaust gas recirculation heat exchanger assembly that includes a tube, a fin structure, and a clip. The tube has first and second walls extending between a first lateral end and a second lateral end. The fin structure is received in the tube to form a cooling tube assembly. The cooling tube assembly defines a first channel between the first lateral end and a first fin of the fin structure, a second channel between the second lateral end and a second fin of the fin structure disposed opposite the first fin, and a plurality of intermediate channels extending between the first and second channels. The clip is coupled to the cooling tube assembly. The clip has at least one flow impeding portion being configured to impede a fluid flow through at least one of the first channel, the second channel, and one or more of the intermediate channels.