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Experimental Study of Erythritol – Sio2 Phase Change Nanocapsules for Medium Temperature Thermal Storage

SSRN, ISSN: 1556-5068
2023
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Article Description

Erythritol (ET) holds significant potential for medium-temperature solar energy heat utilization. However, its phase change process is susceptible to issues such as leakage, and adhesion to the container. Nanoencapsulation is considered an effective method to mitigate these challenges. Until now, progress in ET nanocapsulation with excellent phase change properties has been limited. This study is dedicated to improving the phase change properties of ET nanoencapsulation. We innovatively synthesized ET nanocapsules (NCETs) with a silica shell using the Sol-gel method. The NCETs were characterized to validate the encapsulation effect and to uncover the mechanism through which thermal cycling affects the thermal storage performance of NCETs. The results show that the NCETs are mostly fabricated at 46-70 nm in diameter, have a melting enthalpy of 294.3 J/g, and a thermal storage efficiency of 78.33%. Continuous thermal cycling leads to aging degradation of ET and damage to the shell layer of the nanocapsules. These factors are the primary reasons for the reduction in the phase change enthalpy of NCETs. The NCETs studied in this research have broad applications in solar medium-temperature heat utilization, waste heat recovery, and various other fields.

Bibliographic Details

Zhiyi Zhang; Qin Jiang; Ming Chen; Kelong Diao; Moucun Yang; Yuezhao Zhu

Elsevier BV

Multidisciplinary; Erythritol; Phase change material; Nano-encapsulation; Thermal storage properties

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