Abstract
Keeping sodium acetate trihydrate (SAT) in supercooled state can be utilized to store heat loss free over long periods. The main risk with this technology is that the SAT may crystalize spontaneously and release the stored heat before desired.
A test rig with 10 marketed heat storage units with water and 35 kg sodium acetate trihydrate composite was built and multiple heating and cooling cycles were carried out with the units. It was monitored if the sodium acetate trihydrate remained supercooled in the 3 days storage period or if the solidification started spontaneously. The units were charged with an inlet temperature of 87⁰C, and then discharged with inlet temperatures of 14⁰C, 22⁰C, 28⁰C or 35⁰C. Spontaneous solidifications occurred more frequently during
discharge in the test cycles with lower discharge temperatures compared to higher inlet temperatures.
A test rig with 10 marketed heat storage units with water and 35 kg sodium acetate trihydrate composite was built and multiple heating and cooling cycles were carried out with the units. It was monitored if the sodium acetate trihydrate remained supercooled in the 3 days storage period or if the solidification started spontaneously. The units were charged with an inlet temperature of 87⁰C, and then discharged with inlet temperatures of 14⁰C, 22⁰C, 28⁰C or 35⁰C. Spontaneous solidifications occurred more frequently during
discharge in the test cycles with lower discharge temperatures compared to higher inlet temperatures.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 12th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning |
| Publisher | International Institute of Refrigeration |
| Publication date | 2018 |
| Pages | 227-231 |
| Article number | 0031 |
| DOIs | |
| Publication status | Published - 2018 |
| Event | 12th IIR Conference on Phase Change Materials and Slurries for Refrigeration and Air Conditioning (PCM2018) - Orford Musique, Orford, Canada Duration: 21 May 2018 → 23 May 2018 http://pcm2018.evenement.usherbrooke.ca/index.html |
Conference
| Conference | 12th IIR Conference on Phase Change Materials and Slurries for Refrigeration and Air Conditioning (PCM2018) |
|---|---|
| Location | Orford Musique |
| Country | Canada |
| City | Orford |
| Period | 21/05/2018 → 23/05/2018 |
| Internet address |
Keywords
- Sodium acetate trihydrate
- Supercooling
- Long-term heat storage
- Experimental testing
- Spontaneous crystallization
Cite this
Dannemand, M., & Furbo, S. (2018). Supercooling stability of sodium acetate trihydrate composites in multiple heat storage unitsS. In Proceedings of the 12th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning (pp. 227-231). [0031] International Institute of Refrigeration. https://doi.org/10.18462/iir.pcm.2018.0031