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.

A rotating heat pipe is used for temperature control of electric motors and generators and other rotating heat generating assemblies to ensure their proper operation. The heat pipe is integral with the shaft, and unlike conventional devices, incorporates a solid-liquid phase change material as the heat transfer/transport material. In addition, it comprises a scraped surface heat exchange mechanism at the heat dissipation region to allow for high cooling rates as required. This scraped surface mechanism is preferentially driven by a magnetic coupling to eliminate issues related to leaks of the heat transfer material.

The disclosed technology includes systems and methods of managing temperature distributions of phase change material. The disclosed technology can include a system comprising a platform having a passageway therethrough. The platform can include a density that is less than a density of the phase change material when in a solid phase and greater than a density of the phase change material when in a liquid phase. The system can further include a whip rod disposed at least partially in the passageway of the platform.

Heat exchangers for thermal storage systems include a valve that can direct process fluid passing through the heat exchanger through supplemental heat exchanger tubing based on a temperature of the process fluid. The supplemental heat exchanger tubing can be located in areas where ice formation can occur during freezing of the storage fluid of the thermal storage system, but apart from the standard flow path for the heat exchanger. The valve can be a thermally-actuated valve. The thermally actuated valve can be set to divert flow of the process fluid to the supplemental tubing when the process fluid is at or above a melting temperature of the storage fluid. Methods can include selectively flowing process fluid through supplemental heat exchange tubing when it is at a temperature greater than the melting point of a storage material.

A heat accumulator device is provided having a metal phase-change material as an accumulator material, the heat accumulator device including at least one a holding chamber having a holding space for the accumulator material, a housing for the holding space, at least one heat input apparatus for inputting heat into the at least one holding chamber, and at least one heat output apparatus for outputting heat from the at least one holding chamber. A coupling region of the heat input apparatus, provided for thermal coupling to the accumulator material, and/or a coupling region of the heat output apparatus, provided for thermal coupling to the accumulator material, is arranged, at least in part, at a distance from the accumulator material.

The present invention relates to a thermal battery (1) comprising an enclosure comprising a fluid inlet and outlet and comprising within it an encapsulated phase-change material in the form of at least one tube (3), at least one tube (3) being wound in a spiral within the enclosure.

A phase change thermal management device includes a casing, a plurality of inner walls and a phase change material. The casing defines an internal space. The inner walls are arranged in the internal space and crossed one another to form a plurality of accommodation cells. Two adjacent accommodation cells are communicated with each other through at least one opening on one of the inner walls. The phase change material is provided in at least portions of the accommodation cells.

A heat exchanger includes a core defining a first passageway and a second passageway. The core includes a plurality of unit cells coupled together. Each unit cell of the plurality of unit cells includes a first wall and a second wall. The second wall is spaced from the first wall. The first wall at least partially defines a first passageway portion and a second passageway portion. The second wall at least partially defines the second passageway portion. The second wall extends about the first wall such that the first passageway portion is nested within the second passageway portion.

Heat exchanger device comprising a tubing for receiving and delivering a heat transfer fluid; a phase-change material, PCM, encompassing said tubing; a plurality of cells receiving the phase-change material, PCM, such that the flow of the heat transfer fluid in said tubing causes each cell PCM to change phase gradually in the direction of the inlet to the outlet. The cells may be closed cells or open cells, the tubing may comprise fins and the exchanger may comprise an external tank for containing the PCM. The heat exchanger may comprise a second tubing for receiving and delivering a second heat transfer fluid, wherein the second tubing is connected to the PCM cells and/or to the fins of the first tubing, such that heat is transferred between the first tubing and the second tubing as each cell PCM gradually changes phase.

A system including modular units of packaged phase change material; means to secure the modular units of packaged phase change material to a roof of a structure; and wherein the phase change material being packaged in an infrared reflective and ultraviolet stable material. A housing may also be used to retain the modular units of packaged phase change material. The phase change material serves to reduce the energy load of the structure.