Clean Energy Technology

Heat is stored and released at constant temperature thanks to a change in the phase of a material from the solid state to the liquid state.

Heat is stored and released at constant temperature thanks to a change in the phase of a material from the solid state to the liquid state. Such systems would be used for temperatures between 90 and 200 °C.

A hot water tank stores sanitary hot water to meet household daily needs.

An open-loop geothermal network uses an aquifer to store cold or heat on a seasonal basis.

Heat is stored and released at constant temperature thanks to a change in the phase of a material from the solid state to the liquid state. Such systems would be used for temperatures up to 100 °C.

Heat is stored and released at constant temperature thanks to a change in the crystalline structure of a solid material.

Heat is produced through an electric resistance, the solid state storage media is vacuum-insulated, and the heat exchange to the 90 °C distribution system is embedded in the product. The system could be a cylinder of around 1m-large and 2m-high that can draw up to 20 kW of electrical power.

A closed-loop geothermal network operates to store heat seasonally in the ground (while a conventional ground source heat pump dissipates heat or cold in the subsurface).

Heat is stored and released at constant temperature thanks to a change in the phase of a material from the solid state to the liquid state. Such systems would be used for temperatures above 200 °C.

A chilled water storage system charges cold water thanks to an air/water/ground-to-water conditioning unit when there is no congestion in the electricity grid. The system restores the cooling to the distribution system during peak period, thus reducing the peak load.

Phase change materials are able to store energy through changing the physical state of a material from solid to liquid, and releasing it through solidification. They are therefore able to act as a passive thermal battery.

Storage device based on reversible chemical reaction which allows heat adsorptions. Thermal energy is used to dissociate compounds (“AB”) into two reaction products (“A” and “B”). Upon subsequent recombination of the reactants, an exothermic reverse reaction occurs and the previously-stored heat of reaction is released. A reverse reaction results in heat release. This allows for the theoretically loss-less storage of thermal energy.