A heat storage material composition according to an aspect of the present invention includes a main agent mixture composed of calcium chloride hexahydrate. ammonium chloride, and water. wherein when the content of calcium chloride hexahydrate is defined as CA mass %, the content of ammonium chloride is defined as NH mass %. and the content of water is defined as W mass % in 100 mass % of the main agent mixture, parameters X and Y defined by equations (P1) and (P2) below satisfy equations (1) to (5) below.

[Equation 1]

X=100×CA/(CA+W)   (P1)

[Equation 2]

Y=100×NH/(CA+NH+W)   (P2)

[Equation 3]

X−51.75>0   (1)

[Equation 4]

52.75−X>0   (2)

[Equation 5]

4.25−Y>0   (3)

[Equation 6]

1.2245X+Y−66.367>0   (4)

[Equation 7]

−2.1569X+Y+110.27>0   (5)

A phase change thermal storage unit having has at least one conformational feature selected from (i) a fill port located proximate a corner of the of the panel, (ii) internal contouring that alters the thickness of the phase change material retention chamber for creating an average thickness of the chamber within a central portion of the chamber which is less than the average thickness of the chamber within a peripheral portion of the chamber, and (iii) fingertip indentation handles proximate each and every edge.

A thermal storage subsystem may include at least a first storage reservoir configured to contain a thermal storage liquid at a storage pressure that is greater than atmospheric pressure. A liquid passage may have an inlet connectable to a thermal storage liquid source and configured to convey the thermal storage liquid to the liquid reservoir. A first heat exchanger may be provided in the liquid inlet passage and may be in fluid communication between the first compression stage and the accumulator, whereby thermal energy can be transferred from a compressed gas stream exiting a gas compressor/expander subsystem to the thermal storage liquid.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

The invention relates to a modular assembly (E) for storing heat by phase-change material including a plurality of heat-storage modules (M1) attached to one another, the heat-storage assembly comprising a vessel (2). At least two adjacent modules are disposed so that a porous external wall (6b) of one of the modules (M1) is arranged facing a porous external wall (6b) of the other of the modules (M1), and so that a solid external wall (6a) of one of the modules (M1), forming one of the parts of the vessel, is attached to a solid external wall (6a) of the other of the modules (M1), forming another part of the vessel.

Structures of a particle containing a core and at least one shell, a metal oxide material of which is necessarily doped to ensure protection of a material of the core from photodegradation. The core can include any of a thermochromic material, a phase-change material, and a judiciously defined auxiliary material that in turn contains organic and/or polymeric material. Derivative products utilizing a plurality of such particles. Methodologies for producing such particles and derivative products.

A heat storage composite material comprises components by weight: 30-55 parts of organic phase change material, 30-40 parts of two-dimensional thermally conductive carbon material, 10-20 parts of lamellar structure graphite, and 0-10 parts of oil-absorbing organic resin. A preparing method include steps of stirring the organic phase change material to disperse on a surface of the two-dimensional thermally conductive carbon material, and melting them so the organic phase-change material is adsorbed in gaps of the two-dimensional thermally conductive carbon material; stirring and mixing the lamellar structure graphite and the two-dimensional thermally conductive carbon material adsorbed with the organic phase change material in a mixer to obtain a mixed material; and placing the mixed material in a lamination mold for lamination treatment to obtain a sheet-shaped heat storage composite material. The heat storage composite material has high thermal conductivity and is not easy to leak.

A water purifier includes a water tank having a cold water path inside the tank, a coolant inside the water tank, a cooling device including an evaporator inside the water tank and through which a refrigerant flows, and a compressor that is operable to compress the refrigerant. The cooling device is configured to cool the coolant to cool water flowing through a temperature sensor, which is configured to detect a temperature of the coolant and output coolant temperature information about the detected temperature of the coolant. The purifier also includes an agitator operable to agitate the coolant and a controller configured to control the compressor and the agitator to operate simultaneously and control the agitator to stop operating while the compressor is controlled to continue operating based on preset ice-making temperature information and the coolant temperature information. There is also a method of controlling a compressor and an agitator.

The present application pertains in some embodiments to a thermal storage system. The system may include, for example, a warm thermal storage region; a cold thermal storage region; and a physical divider. The warm thermal storage region may include at least two liquid phases. The cold thermal storage region may include at least one liquid phase. The physical divider substantially separates the warm thermal storage region from the cold thermal storage region.

Disclosed is a method for enhancing thermal energy storage performance of industrial grade hydrated salts based on phase change, comprising: heating an aqueous system of industrial grade hydrated salts containing 105-130 percent (%) by mass of m.sub.0 industrial grade hydrated salt to m.sub.0, taking a sample for differential scanning calorimeter testing and recording its melting enthalpy as ΔH.sub.1; melting and adding water into, or melting and evaporating the residual aqueous system of industrial grade hydrated salts or the residual industrial grade hydrated salts system with a mass of m.sub.1 to increase or decrease the mass by 0.4-0.8% m.sub.0 until a melting enthalpy ΔH.sub.n of a sample that taken from the residual aqueous system of industrial grade hydrated salts with a mass of m.sub.n satisfies ΔH.sub.2< . . . <ΔH.sub.n>ΔH.sub.n+1.