Article (Scientific journals)
Carbonated balsa based shape-stable phase change materials with photothermal conversion and application in a greenhouse
Zhang, Zhaoli; Zhang, Nan; Pan, Xiyu et al.
2024In Solar Energy Materials and Solar Cells, 266, p. 112699
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Keywords :
Phase change material; Photothermal conversion; Thermal energy storage; Shaping stability; Greenhouse emissions
Abstract :
[en] The greenhouse enables to promotion of plant yield through creating an optimal environment. Efficient solar energy conversion and storage is a promising strategy to address the energy shortage issue of greenhouses in winter. This paper prepares form-stable composite phase change materials (PCMs) to store solar energy efficiently. Lightweight and porous balsa wood subjected to high-temperature carbonization is designed to simultaneously solve the liquid leakage, enhance the thermal conductivity, and improve the photothermal conversion and thermal energy storage of PCM. OP44E and SEBS are utilized as PCM and thickeners, followed by vacuum impregnation into the carbonized balsa wood (CW). Results indicate that the carbon content of CW increases with the augment of carbonization temperature. Shaping effects of CW and SEBS endow-composite PCMs to have the highest adsorption rate of 92.7 wt.% with enthalpy over 190 J/g. Composite PCMs reveal reliable thermal properties and thermal stability below 100 °C. Composite PCMs have photothermal conversion larger than 88% under xenon lamp radiation. The temperature of PCMs on the shallow layer is higher owing to their photothermal conversion capacity. Greenhouse test indicates that CW/OP44E/SEBS greenhouse gains a higher PCM temperature of 71.5 °C at 70 min, compared to 40.3 °C in empty and OP44E/SEBS cases. CW/OP44E/SEBS greenhouse maintaining indoor temperature over 20 °C lasts 15.3 min longer than empty and OP44E/SEBS greenhouses. In addition, form-stable composite PCMs feature excellent thermal stability, and photothermal conversion is capable of maintaining the stable indoor temperature of a greenhouse, indicating potential in the field of agricultural building temperature regulation.
Research center :
Sustainable Building Design Lab
Disciplines :
Architecture
Author, co-author :
Zhang, Zhaoli
Zhang, Nan
Pan, Xiyu
Yuan, Yanping
Sultan, Muhammad
Attia, Shady  ;  Université de Liège - ULiège > Département ArGEnCo > Techniques de construction des bâtiments
Language :
English
Title :
Carbonated balsa based shape-stable phase change materials with photothermal conversion and application in a greenhouse
Publication date :
01 May 2024
Journal title :
Solar Energy Materials and Solar Cells
ISSN :
0927-0248
Publisher :
Elsevier, Netherlands
Volume :
266
Pages :
112699
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
11. Sustainable cities and communities
Available on ORBi :
since 02 January 2024

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