Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

A heat exchanger includes a first flow circuit structure having at least a first portion defined by a plurality of conduits and a second flow circuit structure having at least a second portion disposed at the first portion such that walls of the second portion are disposed between the conduits and are free to move relative to the conduits. Fluid flowing through the first flow circuit structure is fluidically isolated from fluid flowing through the second flow circuit structure.

A washer fluid heater disposed within a vehicle having an engine cooling system and a washer fluid dispensing system. The washer fluid heater includes a plurality of thin walled, closely spaced tubular members concentrically arranged around a central axis of the washer fluid heater. Each of the tubular members is separated from an adjacent tubular member by one of a plurality of flow channels. The plurality of flow channels includes first and second groups of flow channels. The washer fluid heater also includes a first end cap and a second end cap, where the first end cap includes a first washer fluid port and a first coolant port and the second end cap includes a second washer fluid port and a second coolant port. The first and second washer fluid ports are coupled to the first group of flow channels while the first and second coolant ports are coupled to the second group of flow channels.

Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

A system of double concentric pipes having different enthalpy including a plurality of double pipes where the internal pipe is made of a material of high thermal conductivity and the external pipe is made of a material of low thermal conductivity.

A heat transfer device for transferring heat energy to or from a gas or fluid flowing radially across a plurality of posts or tubes includes a plate having a plate surface. A plurality of posts or tubes are disposed on and protrude substantially perpendicular to the plate surface. At least about 50% of the plurality of posts or tubes are disposed according to a phyllotaxis layout. Each arc of a plurality of phyllotaxis spiral arcs of the phyllotaxis layout terminates at different locations along an arc radius on the plate at a phyllotaxis arc termination radius less than a perimeter radius.

Dendritic heat exchangers and methods of utilizing the same are disclosed herein. The dendritic heat exchangers include an elongate housing extending between a first end and a second end. The elongate housing defines a housing volume, a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet. The dendritic heat exchangers also include a heat exchange structure extending within the housing volume. The heat exchange structure is configured to receive a second fluid inlet stream from the second fluid inlet and to provide a second fluid outlet stream to the second fluid outlet. The heat exchange structure includes a plurality of dendritic tubulars. Each dendritic tubular includes an inlet region, which defines an inlet conduit, and a branching region. The branching region defines a plurality of branch conduits that extends from the inlet conduit. The methods include methods of utilizing the dendritic heat exchangers.

A heat exchanger includes a first flow path through which a first fluid flows, a second flow path through which a second fluid flows, and an adjustment layer disposed between the first flow path and the second flow path adjacent to each other and that adjusts an amount of heat exchange between the first flow path and the second flow path. The adjustment layer includes a first portion and a second portion having a heat transfer performance lower than that of the first portion, and has a heat transfer performance varied depending on a position in the adjustment layer.

A heat exchanger assembly is provided which includes a coaxial heat exchanger that is formed, at least in part, of a more corrosion resistant material such as, but not limited to stainless steel, titanium and/or alloys thereof. The assembly further includes a condenser tee connected at each end of the coaxial conduit or tubing defining the heat exchanger. The assembly allows for a non-brazed connection of the condenser tee to an inner tube of the coaxial heat exchanger. In some embodiments, the compression fitting may be connected directly to the heat exchanger without the use of a tee.

The present invention relates to the field of printed circuit heat exchangers, and in particular, to a modular square-circular composite channel printed circuit heat exchanger. The modular square-circular composite channel printed circuit heat exchanger comprises a shell, wherein the shell is divided into an inlet diverter section, a first parallel heat exchange section, a core heat exchange section, a second parallel heat exchange section, and an outlet combiner section from left to right, a plurality of square fin channels and circular micro-channels are uniformly arranged in the shell along a length direction of the shell. According to the present invention, a ratio of an average thermal resistance of a hot side to an average thermal resistance of a cold side is close to 1, which ensures the heat exchange efficiency while taking into the account structure safety and prevents the local over-temperature.