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Thermal and cryogenic energy storage

Thermal energy storage (TES) refers to a collection of technologies that store energy in the forms of heat, cold or their combination, which currently accounts for approximately 55% of global non-pumped hydro storage installations. Cryogenic energy storage (CES) is a coupled thermo-mechanical storage technology invented in the UK with electrical storage as the main function and TES as ancillary to enhance the round-trip efficiency of the CES. This session is split into two sub-sessions of TES and CES. In the TES sub-session, a brief outline will be given first on the background and challenges of the technology. Recent progress will then be summarized in TES materials, components and devices and system integration, with a focus on linking the materials properties to the system level performance. TES can be sensible heat, latent heat or thermochemical based. The latent heat storage materials, often called phase change materials (PCMs), will be used as an example, particularly inorganic salts based PCMs, to illustrate through both modelling and experiments, how the system level performance can be linked to the properties of PCM based TES materials formulated based on molecular scale understanding. In the CES sub-session, a brief summary of the principle and technology development history will be given first, followed by the experimental results of the world first pilot plant and thermodynamic analyses. Finally, CES system modelling, optimisation and integration with solar thermal power plant, gas peaking plant and nuclear power plant will be explained.

Author(s):

Yulong Ding    
University of Birmingham
United Kingdom

 

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