Highly durable and thermally conductive shell-coated phase change capsule as a thermal energy battery

Title
Highly durable and thermally conductive shell-coated phase change capsule as a thermal energy battery
Authors
최웅수도태구정영균고영건
Keywords
phase change material; microencapsulation; phase change capsule; thermal hysteresis; phase change slurry; heat transfer fluid
Issue Date
2020-02
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 12, NO 5-5766
Abstract
Robust and thermally conductive phase-change capsules (PCCs) can be effectively used as dispersoids for heat transfer fluids (HTFs) to utilize waste heat. Here, we demonstrate PCCs encapsulated with a cross-linked poly(2-hydroxyethyl methacrylate) shell that showed high durability and low thermal hysteresis for effective heat uptake and release. The circulation system was manufactured by mimicking the 4th Generation District Heating (4GDH) system to confirm the heat delivery efficiencies of PCC-dispersed slurries (PCSs) as the HTFs. The enthalpy change of water after it received heat from the PCS improved by up to 41.1% on increasing the amount of PCCs in the PCS. Furthermore, a high PCC recovery of 92 wt % was achieved after 1500 cycles, which accompanied a phase transition. The PCC developed by us can thus enable effective storage/delivery of waste heat-driven energy for zero-energy buildings and a 4GDH system, as well as thermal management of electronics.
URI
http://pubs.kist.re.kr/handle/201004/71003
ISSN
1944-8244
Appears in Collections:
KIST Publication > Article
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