eprintid: 10196998
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/19/69/98
datestamp: 2024-09-17 08:15:25
lastmod: 2024-09-17 08:15:25
status_changed: 2024-09-17 08:15:25
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Li, C
creators_name: Sun, Z
creators_name: Wang, Y
creators_name: Zhu, J
creators_name: Wu, J
creators_name: Feng, L
creators_name: Wen, X
creators_name: Cai, W
creators_name: Yu, H
creators_name: Wang, M
creators_name: Wu, J
creators_name: Liu, D
title: A novel biogenic porous core/shell-based shape-stabilized phase change material for building energy saving
ispublished: pub
divisions: UCL
divisions: B04
divisions: C04
divisions: F34
keywords: Phase change material, Biogenic porous silica, Biochar, Rice husk, Thermal energy storage
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
abstract: The application of phase change materials (PCMs) for thermal storage in construction can effectively reduce building energy consumption. However, high costs and vulnerability to leaks have hindered their application. The present study proposes two approaches for the synthesis of porous supporting matrices derived from rice husk, resulting in the formation of rice husk silica (RHS) and rice husk carbon (RHC). Then, n-octadecane and the porous materials were combined by vacuum impregnation, while the leakage resistance performance of the composite PCMs was enhanced by applying epoxy resin coating to create a shell-core structure. The results show that the n-octadecane/RHS and n-octadecane/RHC composite PCMs exhibit high latent heat potential of 106.5 J/g and 116.3 J/g, respectively. Both porous supporting structures provided the PCMs with robust structural stability and exceptional thermal conductivity. The thermal conductivity of the n-octadecane/RHS composite PCMs and n-octadecane/RHC composite PCMs reached 0.52 W/(m K) and 0.41 W/(m K), respectively. The thermal properties of the biogenic porous core/shell-based shape-stabilized PCMs were characterized by an analog T-history method, and the results demonstrated that the composite PCMs exhibited excellent and rapid heat storage and exothermic capabilities. After undergoing 300 complete heating and cooling cycles, the composite PCMs demonstrate exceptional thermal reliability and possess a high enthalpy capacity. Finally, the impact of the pore structure of RHS and RHC on the crystallization behavior of n-octadecane was discussed. Both composite PCMs can be regarded as environmentally friendly construction materials with promising thermal and acoustic properties.
date: 2024-08
date_type: published
publisher: Elsevier BV
official_url: http://dx.doi.org/10.1016/j.est.2024.112504
full_text_type: other
language: eng
verified: verified_manual
elements_id: 2292653
doi: 10.1016/j.est.2024.112504
lyricists_name: Wang, Meng
lyricists_id: MWANK34
actors_name: Wang, Meng
actors_id: MWANK34
actors_role: owner
full_text_status: restricted
publication: Journal of Energy Storage
volume: 95
article_number: 112504
citation:        Li, C;    Sun, Z;    Wang, Y;    Zhu, J;    Wu, J;    Feng, L;    Wen, X;                     ... Liu, D; + view all <#>        Li, C;  Sun, Z;  Wang, Y;  Zhu, J;  Wu, J;  Feng, L;  Wen, X;  Cai, W;  Yu, H;  Wang, M;  Wu, J;  Liu, D;   - view fewer <#>    (2024)    A novel biogenic porous core/shell-based shape-stabilized phase change material for building energy saving.                   Journal of Energy Storage , 95     , Article 112504.  10.1016/j.est.2024.112504 <https://doi.org/10.1016/j.est.2024.112504>.      
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10196998/1/EST-D-24-03256.pdf