About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
D-3: Enhanced Reversibility in Calcium Chloride Hexahydrate with Nucleation Agents for Thermal Energy Storage Applications |
Author(s) |
Denali Ibbotson, Sophia Ahmed, Patrick J. Shamberger |
On-Site Speaker (Planned) |
Denali Ibbotson |
Abstract Scope |
Thermal energy storage (TES) systems that utilize phase change materials (PCMs) can increase efficiency and decrease peak energy demand in heating and cooling systems. Salt hydrates are of interest due to their high thermal conductivities, high energy densities, and low cost, but can experience undercooling, which can result in phase segregation in eutectic systems. To counter these issues, nucleation agents are added to systems to induce nucleation and suppress formation of metastable phases. This study investigates the dependence of undercooling in calcium chloride hexahydrate on crystal structure, chemistry, and the solubility of a suite of inorganic nucleation agents. Barium-based, insoluble nucleation agents result in at least a 10 °C decrease in undercooling and more consistent solidifying behavior (less than 10 °C variations of solidification temperatures). This observed behavior overcomes a principal limitation of salt hydrate TES materials, allowing for their potential utilization in HVAC systems and building thermal management. |
Proceedings Inclusion? |
Planned: |