The invention relates to a heat exchanger comprising a first free space (7) for a first fluid (3), a thermally conductive wall (11) which, at least locally, delimits said first free space (7), in such a way that an exchange of heat can occur between the first fluid and the thermally conductive wall (11) which is hollow and encloses a material (13) for storing thermal energy by accumulation of latent heat, by heat exchange with at least the first fluid. The first free space (7) is divided into at least two separated channels (7a, 7b) in which two streams of the first fluid (3) can circulate at the same time but separately, the thermally conductive wall (11) which encloses the thermal energy storage material (13) being interposed between the two channels (7a, 7b).

Provided is a heat storage material composition that is less likely to vaporize and has a sufficiently stabilized supercooled state. A heat storage material composition according to an aspect of the present disclosure includes sodium acetate, water, and an alcohol. The alcohol includes at least one selected from the group consisting of 1,2-butanediol and a dihydric alcohol having 5 or 6 carbon atoms. The dihydric alcohol is for example a straight-chain alcohol. For example, two hydroxy groups contained in the dihydric alcohol are each bonded to a different one of a carbon atom at a 1-position and a carbon atom at a 2-position contained in the dihydric alcohol. The alcohol includes for example at least one selected from the group consisting of 1,2-butanediol, 1,2-pentanediol, and 1,2-hexanediol.

A vehicle having a heating and cooling system includes a refrigerant loop for conveying refrigerant, a coolant loop for conveying coolant, a chiller configured to convey the refrigerant and the coolant, and a vessel coupled to the chiller and having a phase change material disposed therein. The phase change material is configured to freeze via heat transfer from the phase change material to the refrigerant and melt via heat transfer from the coolant to the phase change material.

A structure includes: a heat insulating layer; an evaporator provided on one surface side of the heat insulating layer; a condenser provided on the other surface side of the heat insulating layer; a vapor flow path for guiding refrigerant vapor generated as a result of evaporation at the evaporator to the condenser; and a liquid refrigerant flow path for guiding a liquid refrigerant generated as a result of condensation at the condenser to the evaporator, in which the evaporator has a wick layer for evaporating the refrigerant stored on a lower portion side with heat from one surface side of the evaporator while suctioning up the refrigerant by capillarity and holding the refrigerant, and the evaporator and the condenser are installed so as to overlap by ½ or more in the direction in which the wick layer suctions up the refrigerant.

A heat exchanger 100, including: an inner cylinder 10 through which a first fluid can flow, the inner cylinder 10 being configured to house a heat recovery member 30; and an outer cylinder 20 disposed so as to be spaced on a radially outer side of the inner cylinder 10 such that a second fluid can flow between the outer cylinder 20 and the inner cylinder 10. In the heat exchanger 100, at least a part of the outer cylinder 20 and/or the inner cylinder 10 has at least one continuous irregular structure 40.

A thermal storage system includes a container, a thermal exchange device, a first thermal storage material, and a second thermal storage material. The first thermal exchange device is disposed in the container. The first thermal storage material is disposed in the container and is spaced apart from the thermal exchange device. The second thermal storage material is also disposed in the container in contact with the thermal exchange device. The first and second thermal storage materials are immiscible. The second thermal storage material is less reactive with the construction material of the thermal exchange device as compared to the first thermal storage material. Optionally, a second thermal exchange device can be submerged in the second thermal storage material. The first thermal exchange device is configured to supply heat to the second thermal storage material and the second thermal exchange device facilitates extraction of heat from the second thermal storage material.

A thermal energy storage device that includes an air distribution conduit and a phase change material. The phase change material is embedded or integrated onto at least an outer portion or inner portion of the air distribution conduit. The energy storage system for buildings includes the thermal energy storage device and an air distribution apparatus that provides air into the device, which is in fluid communication with the air distribution apparatus.

A thermal storage system includes a container, a thermal exchange device, a first thermal storage material, and a second thermal storage material. The first thermal exchange device is disposed in the container. The first thermal storage material is disposed in the container and is spaced apart from the thermal exchange device. The second thermal storage material is also disposed in the container in contact with the thermal exchange device. The first and second thermal storage materials are immiscible. The second thermal storage material is less reactive with the construction material of the thermal exchange device as compared to the first thermal storage material. Optionally, a second thermal exchange device can be submerged in the second thermal storage material. The first thermal exchange device is configured to supply heat to the second thermal storage material and the second thermal exchange device facilitates extraction of heat from the second thermal storage material.

A heat exchange apparatus for cooling water of a fuel cell includes a body, through which a cooling water pipe having cooling water flowing therethrough to be supplied to a fuel cell stack, passes; and a heat accumulator provided in an interior of the body and filled with a PCM heat accumulation material that exchanges heat with the cooling water. The body includes a medium space provided between the cooling water pipe and the heat accumulator such that the heat accumulator is spaced apart from the cooling water pipe. The PCM heat accumulation material exchanges heat with the cooling water by a medium of the medium space.

Example heat exchangers and methods of use are described herein. An example heat exchanger includes a lattice structure including a plurality of conduits defining a plurality of interstitial voids between the plurality of conduits. Each of the plurality of conduits includes an inlet and an outlet, and the plurality of conduits are arranged such that, between the inlet and the outlet, each of the conduits intersects at least one other conduit to enable flow between the intersecting conduits. The example heat exchanger also includes a first manifold formed unitarily with the lattice structure, the first manifold comprising a first plurality of openings in fluid communication with each inlet of the plurality of conduits. The example heat exchanger further includes a phase change material (PCM) disposed within and substantially filling the plurality of interstitial voids.