Thermochemical energy storage systems: modelling, analysis and design
Date
2010-07-01
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Abstract
Thermal energy storage (TES) is an advanced technology for storing thermal energy
that can mitigate environmental impacts and facilitate more efficient and clean energy
systems. Thermochemical TES is an emerging method with the potential for high
energy density storage. Where space is limited, therefore, thermochemical TES has
the highest potential to achieve the required compact TES. Principles of
thermochemical TES are presented and thermochemical TES is critically assessed and
compared with other TES types. The integration of TES systems with heating,
ventilating and air conditioning (HVAC) applications is examined and reviewed
accounting for various factors, and recent advances are discussed. Thermodynamics
assessments are presented for general closed and open thermochemical TES systems.
Exergy and energy analyses are applied to assess and compare the efficiencies of the
overall thermochemical TES cycle and its charging, storing and discharging
processes. Examples using experimental data are presented to illustrate the analyses.
Some important factors related to design concepts of thermochemical TES systems
are considered and preliminary design conditions for them are investigated.
Parametric studies are carried out for the thermochemical storage systems to
investigate the effects of selected parameters on the efficiency and behavior of
thermochemical storage systems.
Description
Keywords
Thermal energy storage, Thermochemical energy storage, Energy efficiency, Exergy efficiency, First law efficiency, Second law efficiency, Exergy