TY - JOUR
T1 - Microencapsulation of molten salt in stable silica shell via a water-limited sol-gel process for high temperature thermal energy storage
AU - Zhang, Hanfei
AU - Balram, Anirudh
AU - Tiznobaik, Hani
AU - Shin, Donghyun
AU - Santhanagopalan, Sunand
N1 - Publisher Copyright:
© 2018
PY - 2018/5/25
Y1 - 2018/5/25
N2 - Microencapsulated phase change material as high temperature latent heat storage (LHS) has great potential for renewable energy applications. However, high temperature compatible microencapsulation techniques have rarely been reported so far. Successful microencapsulation of molten salt with high melting point and high latent heat is demonstrated in this work. The microcapsules are demonstrated to be thermally stable at a relatively high melting point of the salt (334 °C) with a high encapsulation ratio (95.2%) which can be well controlled through a Tetraethyl orthosilicate (TEOS) hydrolysis/condensation process. The demonstrated stability and excellent controllability of this process makes the synthesized KNO3@silica microcapsule the first real demonstration of a controllable micro/nanoencapsulation technique that can be used for high temperature applications without much limitation on PCM selection, especially for molten salts.
AB - Microencapsulated phase change material as high temperature latent heat storage (LHS) has great potential for renewable energy applications. However, high temperature compatible microencapsulation techniques have rarely been reported so far. Successful microencapsulation of molten salt with high melting point and high latent heat is demonstrated in this work. The microcapsules are demonstrated to be thermally stable at a relatively high melting point of the salt (334 °C) with a high encapsulation ratio (95.2%) which can be well controlled through a Tetraethyl orthosilicate (TEOS) hydrolysis/condensation process. The demonstrated stability and excellent controllability of this process makes the synthesized KNO3@silica microcapsule the first real demonstration of a controllable micro/nanoencapsulation technique that can be used for high temperature applications without much limitation on PCM selection, especially for molten salts.
KW - High temperature latent heat storage
KW - Microencapsulation
KW - Molten salt encapsulation
KW - Thermal energy storage
UR - http://www.scopus.com/inward/record.url?scp=85043397620&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2018.02.050
DO - 10.1016/j.applthermaleng.2018.02.050
M3 - Article
AN - SCOPUS:85043397620
VL - 136
SP - 268
EP - 274
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
ER -