A novel low-temperature fabrication approach of composite phase change materials for high temperature thermal energy storage

Yu, Qinghua, Jiang, Zhu, Cong, Lin, Lu, Tiejun, Suleiman, Bilyaminu, Leng, Guanghui, Wu, Zhentao, Ding, Yulong and Li, Yongliang (2019). A novel low-temperature fabrication approach of composite phase change materials for high temperature thermal energy storage. Applied Energy, 237 , pp. 367-377.

Abstract

Phase change materials (PCMs) are generally integrated into matrix materials to form shape-stabilized composite heat storage materials (HSMs) used for high temperature thermal energy storage applications. The conventional fabrication of composite HSMs is prevalently implemented at quite high temperatures, which is energy-intensive and narrows down the range of applicable PCMs because of thermal decomposition. Therefore, this paper establishes a novel fabrication approach to accomplish highly dense matrix to encapsulate PCMs at extremely low temperatures, based on the recently developed cold sintering process. The feasibility of the proposed approach was demonstrated by a case study of NaNO3/Ca(OH)2 composite HSMs. It was observed that the Ca(OH)2 matrix formed dense microstructure with obvious sintered boundaries and successfully encapsulated NaNO3 as PCM. The HSMs maintained stable macroscopic shape after hundreds of thermal cycles, and exhibited an energy storage efficiency of 59.48%, little leakage of PCM, and good thermal stability. Mechanical tests indicated that the HSMs possessed excellent mechanical properties when the sintering pressure is over 220 MPa. The discharging time of stored heat was presented through infrared thermography, and the heat storage capacity measured for the composite HSMs was over four times as high as those of typical solid storage materials of sensible heat, which demonstrated their excellent heat storage performances. The HSMs can be used in the form of packed bed or parallel channel with multi-layered heat storage, which is beneficial for efficiently utilizing solar heat and improving the performance of current energy storage system. This study therefore provides a novel route for energy-saving and low-carbon fabrication of shape-stabilized composite HSMs.

Publication DOI: https://doi.org/10.1016/j.apenergy.2018.12.072
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Polymer and advanced materials research group
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: Cold sintering,Dense structure,Heat storage,Phase change material,Building and Construction,Energy(all),Mechanical Engineering,Management, Monitoring, Policy and Law
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 8919?via%3Dihub (Publisher URL)
Published Online Date: 2019-03-01
Published Date: 2019-03-01
Authors: Yu, Qinghua
Jiang, Zhu
Cong, Lin
Lu, Tiejun
Suleiman, Bilyaminu
Leng, Guanghui
Wu, Zhentao ( 0000-0002-4934-8046)
Ding, Yulong
Li, Yongliang

Download

[img]

Version: Accepted Version

Access Restriction: Restricted to Repository staff only until 23 January 2020.

License: Creative Commons Attribution Non-commercial No Derivatives


Export / Share Citation


Statistics

Additional statistics for this record