Experimental Investigation on Graphene Oxide/SrCl2·6H2O Modified CaCl2·6H2O and the Resulting Thermal Performances
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Preparation of Modified CaCl2·6H2O
2.3. Thermo-Physical Performance of Modified CaCl2·6H2O
2.4. Encapsulation of Modified CaCl2·6H2O
2.5. Preparation of Modified CaCl2·6H2O/Wallboard
2.6. Thermo-Regulated Performance of Modified CaCl2·6H2O
3. Results and Discussions
3.1. Thermo-Physical Performance of Modified CaCl2·6H2O
3.2. Thermo-Regulated Performance of Modified CaCl2·6H2O
4. Conclusions
- (1)
- In this study, graphene and SrCl2·6H2O were utilized as nano nucleating agents and successfully reduced the supercooling of pure CaCl2·6H2O to around 0.3 °C which was much lower than that of the original pure CaCl2·6H2O (25.4 °C). The latent heat value and phase change temperature of modified CaCl2·6H2O were 207.88 J/g and 27.6 °C, respectively.
- (2)
- The supercooling degree of modified CaCl2·6H2O after 200 thermal cycles was still much lower than that of non-modified PCM.
- (3)
- Aluminum capsules wrapped with polypropylene bag can effectively prevent leakage and deliquescence of PCM.
- (4)
- The infrared thermography showed that the temperature difference between the top and bottom layers of modified CaCl2·6H2O/wallboard composite was 15.8 °C after heating for one hour, while it was 4.9 °C for control wallboard. The results further demonstrated the excellent thermal energy storage and thermal-regulated capacity of modified CaCl2·6H2O.
Author Contributions
Funding
Conflicts of Interest
References
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No. | Taverage | ||||
---|---|---|---|---|---|
Surface | 0 | 1 h | 3 h | 7 h | |
Control group | Top | 22.3 | 41.1 | 43.0 | 44.1 |
Bottom | 21.8 | 36.1 | 37.5 | 39.7 | |
CaCl2·6H2O/woodboard | Top | 22.3 | 41.2 | 43.1 | 45.3 |
Bottom | 21.0 | 25.4 | 28.5 | 30.9 |
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Jin, Z.; Tian, Y.; Xu, X.; Cui, H.; Tang, W.; Yun, Y.; Sun, G. Experimental Investigation on Graphene Oxide/SrCl2·6H2O Modified CaCl2·6H2O and the Resulting Thermal Performances. Materials 2018, 11, 1507. https://doi.org/10.3390/ma11091507
Jin Z, Tian Y, Xu X, Cui H, Tang W, Yun Y, Sun G. Experimental Investigation on Graphene Oxide/SrCl2·6H2O Modified CaCl2·6H2O and the Resulting Thermal Performances. Materials. 2018; 11(9):1507. https://doi.org/10.3390/ma11091507
Chicago/Turabian StyleJin, Zhiyang, Yuanyuan Tian, Xiaoxiao Xu, Hongzhi Cui, Waiching Tang, Yanchun Yun, and Guoxing Sun. 2018. "Experimental Investigation on Graphene Oxide/SrCl2·6H2O Modified CaCl2·6H2O and the Resulting Thermal Performances" Materials 11, no. 9: 1507. https://doi.org/10.3390/ma11091507