202 results about "Latent heat storage" patented technology

The present invention provides latent heat storage materials having enhanced fire-retardant properties. These include compositions of magnesia cement and a phase change material in which the magnesia cement is formed from magnesium oxide, magnesium chloride, and water. The molar ratio of magnesium chloride to water may be in the range of about 1:17 to 1:32. The magnesium chloride may be dissolved in the water to give a solution having a Baumé in the range between 15° and 26°. The molar ratio of magnesium chloride to magnesium oxide may be in the range of about 1:1 to about 1:5, and the latent heat storage material may additionally comprises fillers, and/or intumescent agents. The phase change material may be a microencapsulated formulation. A process for making these compositions is disclosed.

The present invention provides a latent-heat storage type adsorbent composition for canisters that can effectively prevent changing in temperature due to the heat of absorption/desorption and has a high butane working capacity; a process for producing the adsorbent; and a canister employing the latent-heat storage type adsorbent composition for canisters. The present invention relates to a latent-heat storage type adsorbent composition for canisters which compromises an adsorbent adsorbing a fuel vapor and a heat-storage material comprising microencapsulated phase-changing material which absorbs or releases latent heat in response to temperature change, and a method for producing such an adsorbent.

The invention discloses a silver/silicon dioxide double layer wall material-based multifunctional microcapsule phase-change material, and a preparation method thereof, and belongs to the field of microcapsule phase-change material. According to the preparation method, an organic phase change material, a silicon source, a modification agent with mercapto functional groups, an emulsifier, and a solvent are mixed and stirred so as to obtain an emulsion, and an initiator is added dropwise so as to obtain silicon dioxide signal-layer wall material microcapsules with mercapto groups; the silicon dioxide signal-layer wall material microcapsules, a silver source, a protective agent, and a reducing agent are mixed, and silver ion self assembling and reduction reaction are realized on the microcapsule surfaces under nitrogen protection so as to obtain the nano silver/silicon dioxide double layer wall material-based multifunctional microcapsule phase-change material. Particle size of the nano silver/silicon dioxide double layer wall material-based multifunctional microcapsule phase-change material ranges from 2 to 10<mu>m, possesses a double-layer structure composed of a metallic silver outer layer and an inorganic material silicon dioxide inner layer, is compact in structure, and high in thermal conductivity, possesses electrical conductivity, antibacterial properties, latent heat storage properties, and temperature regulation performance, and can be widely applied to the fields such as medicine, weaving, electron, and spaceflight.

A thermal management matrix for an electrochemical cell array including a plurality of electrochemical cell elements, the thermal management matrix at least in part enveloping the electrochemical cell array and being in thermal contact therewith. The thermal management matrix includes mainly expanded graphite, wherein the expanded graphite is arranged in the form of a block-like structure and the block includes at least one layer of expanded graphite having a higher in-plane thermal conductivity than the layers neighboring the layer with higher in-plane thermal conductivity. The thermal management matrix may also include phase change materials as a latent heat storage material.

A latent heat store is provided having a plurality of heat exchanger units (2) arranged alongside one another with each being at least one phase change store in which a heat exchanger fluid with the storage medium flows at least between adjacent heat exchanger units (2). Latent heat store improved heat management is achieved by at least one common intake (10) for supplying the heat exchanger fluid to the heat exchanger units (2) and for dividing this fluid into a plurality of separate partial flow sections and also at least one common drain (11) for discharging the heat exchanger fluid from the heat exchanger units (2) and for bringing all partial flow sections back together such that the heat exchanger units (2) of the stack (13) collectively exposed to the flow are connected in parallel to one another wherein a variety of flow patterns are provided.

The non-combustion-type flavor inhaler (100) is provided with a heat source (50) and a holding member (30) for detachably holding the heat source (50). The heat source (50) comprises a latent heat storage material containing a sugar alcohol of four or more carbons.

Storage systems based on latent heat storage have high-energy storage density, which reduces the footprint of the system and the cost. However, phase change materials (PCMs), such as NaNO₃, NaCl, KNO₃, have very low thermal conductivities. To enhave the storage of PCMs, macroencapsulation of PCMs was performed using a metal oxide, such as SiO₂ or a graphene-SiO₂, over polyimide-coated or nickel-embedded, polyimide-coated pellets The macro encapsulation provides a self-supporting structure, enhances the heat transfer rate, and provides a cost effective and reliable solution for thermal energy storage for use in solar thermal power plants. NaNO₃ was selected for thermal storage in a temperature range of 300° C. to 500° C. The PCM was encapsulated in a metal oxide cell using self-assembly reactions, hydrolysis, and simultaneous chemical oxidation at various temperatures.

A process for the preparation of latent heat storage composites is provided. The process comprises the steps of preparation of an expanded graphite material with a bulk density between 5 and 200 grams/liter which is readily wetted by a liquid phase change material, preparation of a pre-compressed matrix or a packed bed of the expanded graphite material, and manufacture of a latent heat storage composite by infiltration of the matrix or a packed bed with a phase change material in a liquid state.

A thermal energy storage system is described employing latent heat storage of a supercritical fluid instead of typical phase change materials. Two fundamental thermodynamic concepts are invoked. First, by using the latent heat of liquid/vapor phase change, high energy density storage is feasible. Second, by operating the thermal energy storage system at a higher pressure, the saturation temperature is increased to operate at molten salt temperatures and above. Beyond the two-phase regime, supercritical operation permits capturing and utilizing heat taking advantage of latent and sensible heat, both in the two-phase regime as well as in supercritical regime while at the same time, reducing the required volume by taking advantage of the high compressibilities.

A latent heat storage material, in which a phase-change substance that changes its phase from a solid to a liquid when the temperature of stored fuel rises, is disposed in a fuel tank of the present invention.

The invention relates to a latent heat storage material comprising a first phase change material, at least one second phase change material different from the first phase change material, and an expanded graphite material wherein the first phase change material and the at least one second phase change material are intermixed and the latent heat storage material exhibits a phase transition over a range of temperatures. The invention also relates to a process for the preparation of a latent heat storage material comprising combining a mixture of an expanded graphite material and a first phase change material with at least one different second phase change material.

A rapid absorption and extraction latent heat storage device according to the invention comprises a means (1) for containing at least one phase change material (2) within a containment vessel (3), the containment vessel forming a supporting structural exoskeleton. The containment means (1) is in the form of rods or tubes, which are made out of elastomeric material (4) containing the PCM (2). A heat exchange fluid (6) flows between and along the length of the rods (1).

The invention belongs to the technical field of a high-temperature phase-transition heat storage material, and particularly relates to a combined high-temperature phase-transition heat storage system. The combined high-temperature phase-transition heat storage system is formed by combining a plurality of high-temperature phase-transition heat storage core devices in a certain way; and by adopting the combined and modularized application, the aim of large heat storage and high heat storage efficiency is achieved. The high-temperature phase-transition heat storage cores can be designed to be different structural forms; subsequently according to different heat storage requirements, the high-temperature phase-transition heat storage cores are combined for use in a certain way so as to achieve the aim of storing a certain quantity of heat; the same heat source can be used for heat storage; and a thermal insulation structure is arranged outside the whole heat storage system so as to reduce heat dissipation. During the running process, the whole heat storage system can be controlled by controlling one high-temperature phase-transition heat storage core; the combined high-temperature phase-transition heat storage system can be operated simply and can be used conveniently; furthermore, the heat storage quantity of the whole system is adjustable; the heat storage efficiency is high; the applicable scope is wide, the equipment investment is less, the maintenance is convenient and the adaptability is strong.

A parallel type superconducting solar heat pump hot water bathing and heating system is composed of a superconducting flat plate solar thermal circulation part, an accumulator, a heat pump hot water unit heating circulation part, a heater and an automatic controller, and is characterized in that the superconducting flat plate solar thermal circulation part and the heat pump hot water unit heating circulation part are connected in parallel, independent of each other and mutually complemented for heat collection; the accumulator stores heat in a sensible heat and latent heat storage mode; heating and domestic hot water are provided in a heat exchange mode of an efficient heat exchanger under control of the automatic controller. The parallel type superconducting solar heat pump hot water bathing and heating system is simple in structure, high in heat conversion efficiency, long in yearly running time, free of pollution and remarkable in energy conservation, is not limited by weather or use conditions and well achieves solar bathing, heating and refrigeration.

The invention relates to a solid-state heat storage and heating characteristic matching design method based on heat transfer rate balance, which comprises the following steps of 1) obtaining structural data, material data and operating condition parameters of a high-temperature solid-state heat storage device; 2) establishing a heat transfer rate balance model between that high-temperature heat storage material and the electric resistance heating element; 3) establishing a heat transfer model between the high-temperature heat storage material and the electric resistance heating element according to the heat transfer rate balance model; 5) determining a heat transfer couple boundary condition between the air and the surface of the electric resistance heating element; 6) judging whether thesurface temperature of the electric resistance wire is in an operating temperature range. 7) obtaining the air inlet velocity parameter satisfying the design structure of the air duct of the regenerator and the operation temperature range, so that the structure and the performance of the electric heat element and the heat storage device are matched, thereby realizing the optimization of the wholestructure. (1) The rate of change of temperature is constant, according to which the heat transfer equilibrium equation can be calculated. (2) The heat storage material and the resistance wire match.(3) The shortening of the life of the electric heating element caused by the high temperature brittleness is avoided.

The invention relates to a phase-change material microcapsule with photo-thermal conversion and energy storage properties and a preparation method. A microcapsule core is a phase-change material withheat storage capacity; the wall material is of a multi-wall structure, and a polydivinylbenzene high polymer shell layer is arranged in the wall material and is mainly used for packaging the phase-change material; an MXene shell layer is arranged outside and can be used for improving the encapsulation efficiency and the heat storage capacity of the microcapsule and endowing the microcapsule with aphotothermal conversion effect. According to the preparation method, a one-pot method is adopted to prepare the novel phase-change material microcapsule in a system in which amphiphilic macromolecule1, 1-stilbene-terminated polyglycidyl methacrylate and MXene coexist synergistically and stably. The microcapsule with the multi-wall structure is stable in shape and high in encapsulation rate, hasrelatively high latent heat storage density and excellent photothermal conversion performance, and greatly enriches the application of the phase-change material microcapsule in the fields of solar energy utilization and the like.

A heat storage device includes a pair of electrodes; an alternating-current power source that applies an alternating-current voltage to the pair of electrodes; and a latent heat storage material that is disposed between the pair of electrodes, a supercooled state of the latent heat storage material being maintained by the alternating-current voltage.