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Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
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Solid-State Reactions for the Storage of Thermal Energy
Stefania Doppiu1, Jean-Luc Dauvergne2, Elena Palomo Del Barrio3,4
1Centro de Investigación Cooperativa de Energías Alternativas, CIC energiGUNE, 01510 Vitoria-Gasteiz, Spain. sdoppiu@cicenergigune.com.
Nanomaterials (Basel, Switzerland)
|February 10, 2019
Summary
This study explores solid-state reactions for high-temperature thermal energy storage, identifying promising materials using theoretical calculations and preliminary experiments. The research highlights potential candidates for efficient thermal energy storage applications.
Area of Science:
- Materials Science
- Thermodynamics
- Energy Storage
Background:
- High-temperature thermal energy storage (TES) is crucial for renewable energy integration.
- Existing TES methods often face limitations in efficiency and operating temperature range.
- Solid-state reactions, specifically eutectoid and peritectoid transitions, offer a novel approach for high-temperature TES.
Purpose of the Study:
- To investigate the feasibility of using solid-state reactions for high-temperature thermal energy storage.
- To identify and select promising binary metal and salt systems for TES applications.
- To theoretically evaluate thermodynamic properties relevant to TES.
Main Methods:
- Utilized the Calphad (Calculation of Phase Diagrams) method for theoretical investigation.
- Analyzed binary metal and salt systems to determine thermodynamic properties (enthalpy, free energy, transition temperature, heat capacity).
- Conducted preliminary experimental studies on the binary Manganese-Nickel (Mn-Ni) metallic system.
Main Results:
- Selected several promising candidate materials for TES operating between 300-800 °C based on theoretical analysis.
- The Mn-Ni system exhibited complex behavior with discrepancies between theoretical predictions and experimental outcomes.
- Observed issues in the Mn-Ni system included reaction type, transition temperatures, enthalpies, and product formation, potentially due to synthesis or oxidation sensitivity.
Conclusions:
- Solid-state reactions represent a viable, unexplored avenue for high-temperature thermal energy storage.
- Theoretical Calphad modeling provides essential guidelines for material selection in TES.
- Further research is needed to address experimental discrepancies and optimize material synthesis for reliable TES performance.
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