About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Thermal and Rheological Properties of Sodium Sulfate Decahydrate Phase Change Materials with various Thickening and Stabilization Mechanisms |
Author(s) |
Damilola O. Akamo, Navin Kumar, Yuzhan Li, Cotton Pekol, Kai Li, Jason Hirschey, Tim LaClair, Monojoy Goswami, Orlando Rios, Kyle Gluesenkamp |
On-Site Speaker (Planned) |
Damilola O. Akamo |
Abstract Scope |
Sodium sulfate decahydrate (Na2SO4.10H2O, SSD) is an attractive candidate as a phase change material for thermal energy storage applications. However, it suffers from phase separation and supercooling. Several additives including sodium polyacrylate (SPA), potassium polyacrylate (PPA), carboxymethyl cellulose (CMC), Hydroxyethyl cellulose (HEC), cellulose nanofiber (CNF), dextran sulfate sodium (DSS), and poly(sodium 4-styrenesulfonate) (PSS) were selected to solve these challenges. The effects of these additives on the phase stability, structure, energy storage capacity, and rheological properties of SSD were investigated to identify the optimal additive for the PCM. The composites with SPA, PPA, and CNF experienced a ~40% degradation in the energy storage capacity after 10 cycles while DSS based composite showed ~95% stability in the energy storage capacity even after 50 melt-freeze cycles, making DSS the optimal additive for SSD. This work offers a new route to stabilizing PCMs using polyelectrolytes additives which could be beneficial for energy-efficient building applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Energy Conversion and Storage, Characterization |