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 heat accumulating unit includes an upstream heat accumulator and a downstream heat accumulator each accommodating a supercooling heat accumulating material. Each of the upstream heat accumulator and the downstream heat accumulator has a channel in which fluid flows. In heat accumulation of the supercooling heat accumulating material, the channel of the upstream heat accumulator and the channel of the downstream heat accumulator are set in a serial connection state by a serial connection pipe. In a temperature rise mode, fluid that has passed through the channel of the upstream heat accumulator flows in a bypass pipe.

In one aspect, thermal energy storage systems are described herein. In some embodiments, such a system includes at least one active thermal storage battery and at least one passive thermal storage battery. The at least one active thermal storage battery includes a container, a heat exchanger disposed within the container, and a first phase change material disposed within the container and in thermal contact with the heat exchanger. The at least one passive thermal storage battery comprises a plurality of thermal storage cells, individual thermal storage cells comprising a container having an interior volume, and a second phase change material disposed within the interior volume of the container.

A supercooling release device according to one aspect of the present disclosure releases a supercooled state of a heat storage material. The supercooling release device includes a first member and a second member capable of being brought into contact with each other. The first member and the second member each include a metal. While a load is continuously applied to at least one of the first member and the second member to bring at least a portion of a surface of the first member and at least a portion of a surface of the second member into close contact with each other, the supercooled state is maintained. When the supercooled state is to be released, the supercooling release device reduces the above load.

A latent heat storage window includes a plurality of cells, an operation mechanism, and a magnetic material. The plurality of cells are formed by encapsulating a latent heat storage material including two or more components. The operation mechanism can be operated by a user. The magnetic material causes a specific component of the two or more components included in the latent heat storage material to be unevenly distributed when the operation mechanism is operated.

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.

Methods are provided for controlling thermal energy storage in a thermal energy management system that may operate in response to a variable or high transient heat load. Thermal energy management systems are also provided for controlling thermal energy storage that may operate in response to a variable or high transient heat load.

A Cold Storage System includes a chiller (B), a cold storage (C), a compressor (A), and a bypass control valve (K; L). The chiller (B) is for cooling the heat transfer fluid (HTF) to low or ultra-low temperature. The cold storage (C) is for storing coldness. The compressor (A) enables the circulation of the HTF. The bypass control valve (K; L) is applied in between an exit of chiller (B) and an exit of the cold storage (C) and is adapted to keep a temperature at an inlet of the compressor (A) at a predefined setpoint temperature.

An immersion tank includes a tank main body that includes a storage unit that stores a cooling liquid in which an electronic device is immersed, an upper part of the storage unit having an opening, a lid body that includes a top wall portion and a side wall portion, and is paired with the tank main body, and a gas-phase heat exchanger that cools a space between the storage unit and the top wall portion.

An energy storage and retrieval system is disclosed. The system includes a heat generating layer for generating thermal energy based on combusting a combustible substance and a thermal energy storage layer located to receive thermal energy from the heat generating layer. The thermal energy storage layer includes a thermal energy storage material to store thermal energy. The system also includes a thermal energy retrieval layer thermally connectable to the thermal energy storage material and configurable to retrieve thermal energy from the thermal energy storage layer.