A thermal conveyance system and process for absorbing, transporting, storing, and recovering thermal energy (both hot and cold energy) over a wide range of temperatures from up to 2,100° F., or higher, or cool energy at subzero temperatures in inert and stable particles without the need to maintain a minimum temperature or requiring high system pressures. The process involving the transferring thermal energy to a first transfer fluid and recovering thermal energy from a second transfer fluid wherein the first and the second transfer fluids comprise a two phase thermal media including a gaseous carrier containing a quantity of micron to millimeter sized solid particles.

A thermal conveyance system and process for absorbing, transporting, storing, and recovering thermal energy (both hot and cold energy) over a wide range of temperatures from up to 2,100° F., or higher, or cool energy at subzero temperatures in inert and stable particles without the need to maintain a minimum temperature or requiring high system pressures. The process involving the transferring thermal energy to a first transfer fluid and recovering thermal energy from a second transfer fluid wherein the first and the second transfer fluids comprise a two phase thermal media including a gaseous carrier containing a quantity of micron to millimeter sized solid particles.

A heat storage system using sand as a solid heat storage medium has a fluidized bed heat exchanger (3) arranged between and separated from a storage tank (1) for cold sand and a storage tank (2) for hot sand by weirs (4, 5). The heat exchanger (3) is divided into a plurality of chambers (7) by weirs (6). The weirs (4, 5, 6) are arranged as a combination of overflow and underflow weirs. Fluidized sand is produced in the chambers (7) by a blower (14) positioned underneath the heat exchanger (3). Heat is transferred from a heat source to the sand fluidized and from the fluidized sand to a heat transport medium by transferring mechanisms (8, 9) in the chambers (7). The sand is redirected in a horizontal direction by horizontally acting blowers and/or installations (12) projecting into a respective chamber from a side.

Provided is a heat storage including a container including a first container made of ceramics and a second container made of ceramics, the first container and the second container being combined, and a heat storage material housed inside the container. The first container and the second container are bonded via a bonding member. A volume occupied by pores in the first container, in a first contact region including a surface section in contact with the bonding member, is greater than a volume occupied by pores in regions other than the first contact region. A volume occupied by pores in the second container, in a second contact region including a surface section in contact with the bonding member, is greater than a volume occupied by pores in regions other than the second contact region.

Heat storage devices and circuits suitable for storing solar energy, and associated systems and methods are disclosed. Representative systems can include a solar energy collection system having a first solar field coupled between a first working fluid source and a target heat user via first fluid network, at least one heat storage device, and a second solar field coupled to the at least one heat storage device via a second fluid network. The second fluid network carries a second working fluid and is isolated from fluid communication with the first fluid network. At least one heat exchanger is coupled to the first and second fluid networks to provide thermal communication between the first and second fluid networks.

The invention provides an unpowered anti-frost anti-heave heat gathering device and subgrade thereof, comprising a solar heat absorber, a circulating tube, a transducer, and a heat gathering tube, wherein the solar heat absorber and the transducer are connected by the circulating tube to form a circulation loop, through which a liquid state circulating working medium flows, the solar heat absorber is configured to absorb solar energy and transfer heat to the transducer through the liquid state circulating working medium, the heat gathering tube comprises a heat absorption section and a heat release section in communication, the heat absorption section is inserted into the transducer for absorbing heat from the transducer and transferring heat to the heat release section, and the heat release section is inserted into a subgrade for heating the subgrade.

Methods and devices for long-duration electricity storage using low-cost thermal energy storage and high-efficiency power cycle, are disclosed. In some embodiments it has the potential for superior long-duration, low-cost energy storage.

A novel method is described for water heating using stored solar heat. Solar heat is stored in an insulated tank by using scrap and inexpensive heat absorbing or heat storing materials. Stored solar heat can then be used to heat water in a storage tank by extracting the solar heat using an antifreeze liquid which in turn heat cold water in the water tank. Water temperature in the storage tank is controlled by a thermostat. When the water temperature drops below the set point on the thermostat, a circulating pump turns on and pump the cold water until it reaches the desired set temperature. Once it reaches the set point in the thermostat, the water circulation pump turns off.

A novel method is described for water heating using stored solar heat. Solar heat is stored in an insulated tank by using scrap and inexpensive heat absorbing or heat storing materials. Stored solar heat can then be used to heat water in a storage tank by extracting the solar heat using an antifreeze liquid which in turn heat cold water in the water tank. Water temperature in the storage tank is controlled by a thermostat. When the water temperature drops below the set point on the thermostat, a circulating pump turns on and pump the cold water until it reaches the desired set temperature. Once it reaches the set point in the thermostat, the water circulation pump turns off.

A novel method is described for room heating using stored solar heat. Solar heat is stored in an insulated tank by using scrap and inexpensive heat absorbing or heat storing materials. Stored heat can then be extracted by air circulation for room heating. The temperature of the room air is controlled by a thermostat. When the room temperature drops below the set point on the thermostat, a circulating air pump turns on and extract the solar heat until the room temperature air reaches the desired set temperature. Once room temperature reaches the set point in the thermostat, the air circulation pump turns off.