TY - JOUR
T1 - Improved thermophysical properties of shape-stabilized NaNO3 using a modified diatomite-based porous ceramic for solar thermal energy storage
AU - Jiang, Feng
AU - Ge, Zhiwei
AU - Ling, Xiang
AU - Cang, Daqiang
AU - Zhang, Lingling
AU - Ding, Yulong
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12
Y1 - 2021/12
N2 - Corrosion is regarded as one of great challenges for the application of salts-based phase change materials. To address such problem, a novel skeleton of modified diatomite-based porous ceramic was used to load NaNO3 salt and develop shape-stabilized NaNO3. Particularly, thermophysical properties of composites with skeletons of unmodified and modified diatomite-based porous ceramics (UM-DC and M-DC4) were analyzed. The results showed that these two skeletons effectively prevented NaNO3 from leakage and were chemically compatible with NaNO3. Shape-stabilization of NaNO3 using porous ceramic hardly changed phase transition temperature, but decreased latent heat and enhanced thermal stability. M-DC4 possessed a capacity to load 58.67 wt% salt, nearly 10 wt% higher than other porous ceramics. Compared with NaNO3/UM-DC, NaNO3/M-DC4 performed a higher thermal energy storage density and efficiency of 382.92 J/g and 58.71%, respectively, within 130–330 °C. Importantly, NaNO3/M-DC4 exhibited much better cycling stability during 500 thermal cycles, benefited by the improved micro-flow of molten salt in M-DC4; while NaNO3/UM-DC appeared crack after 100 thermal cycles. Accordingly, the novel skeleton could greatly enhance thermophysical properties of shape-stabilized NaNO3. Such composites could be easily integrated into solar thermal energy storage system. This work proposed a new strategy for the application of salts-based phase change materials.
AB - Corrosion is regarded as one of great challenges for the application of salts-based phase change materials. To address such problem, a novel skeleton of modified diatomite-based porous ceramic was used to load NaNO3 salt and develop shape-stabilized NaNO3. Particularly, thermophysical properties of composites with skeletons of unmodified and modified diatomite-based porous ceramics (UM-DC and M-DC4) were analyzed. The results showed that these two skeletons effectively prevented NaNO3 from leakage and were chemically compatible with NaNO3. Shape-stabilization of NaNO3 using porous ceramic hardly changed phase transition temperature, but decreased latent heat and enhanced thermal stability. M-DC4 possessed a capacity to load 58.67 wt% salt, nearly 10 wt% higher than other porous ceramics. Compared with NaNO3/UM-DC, NaNO3/M-DC4 performed a higher thermal energy storage density and efficiency of 382.92 J/g and 58.71%, respectively, within 130–330 °C. Importantly, NaNO3/M-DC4 exhibited much better cycling stability during 500 thermal cycles, benefited by the improved micro-flow of molten salt in M-DC4; while NaNO3/UM-DC appeared crack after 100 thermal cycles. Accordingly, the novel skeleton could greatly enhance thermophysical properties of shape-stabilized NaNO3. Such composites could be easily integrated into solar thermal energy storage system. This work proposed a new strategy for the application of salts-based phase change materials.
KW - Diatomite
KW - Porous ceramic
KW - Shape-stabilized NaNO
KW - Solar thermal energy storage
KW - Thermophysical properties
UR - http://www.scopus.com/inward/record.url?scp=85110464061&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2021.07.023
DO - 10.1016/j.renene.2021.07.023
M3 - 文章
AN - SCOPUS:85110464061
SN - 0960-1481
VL - 179
SP - 327
EP - 338
JO - Renewable Energy
JF - Renewable Energy
ER -
