Graphene nanoplatelets and copper foams for improving passive cooling performance of PCMs in Singapore's tropical climate
文献类型：期刊论文
| 作者 | Xiong, Teng1,2; Kua, Harn Wei1; Shah, Kwok Wei1; Hussein, Ghasan Fahim1; Zhang, Bai1,3 |
| 刊名 | JOURNAL OF ENERGY STORAGE
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 80页码:20 |
| 关键词 | Composite phase change material Graphene nanoplatelets Copper foam Passive cooling Tropical climate Convection heat transfer |
| ISSN号 | 2352-152X |
| DOI | 10.1016/j.est.2023.110195 |
| 通讯作者 | Kua, Harn Wei(bdgkuahw@nus.edu.sg) |
| 英文摘要 | In Singapore's hot tropical climate, phase change materials (PCMs) hold significant promise for year-round passive cooling solutions in buildings. However, the narrow diurnal temperature range of 24-32 degrees C poses a great challenge for pure PCMs with poor thermal conductivity to undergo complete melting-freezing cycles. Herein, we tested two composite PCMs in a self-designed thermal box: (1) paraffin RT28HC/graphene nanoplatelets (GNP-PCMs) and (2) paraffin RT28HC/copper foam (CF-PCMs). The passive cooling performance of the composite PCMs was evaluated based on their charging power at 32 degrees C and discharging power at 24 degrees C. The focus is on convection heat transfer between the composite PCMs and ambient air, with considering various factors, including GNPs content (0.1-0.9 wt%), CF pore density (40 pores per inch (PPI) and 70 PPI), airflow rate (natural convection and forced convection), and orientation (horizontal and vertical). The results indicate that a minimum temperature range of 26.6-30.3 degrees C is necessary for complete melting-freezing cycles. The effect of GNPs content is more sensitive to orientation, whereas the effect of CF pore density is more affected by airflow rate. In all cases, the CF-PCMs exhibit superior temperature uniformity than the GNP-PCMs. Under forced convection, the charging power and discharging power of pure PCM reached a maximum of 110.8 and 163.5 W/m2, respectively. The addition of GNPs enhanced the charging power and discharging power of pure PCM by up to 14.2 % and 10.2 %, respectively. Moreover, the incorporation of CF boosted the charging power and discharging power of pure PCM by up to 75.1 % and 64.3 %, respectively. |
| WOS关键词 | PHASE-CHANGE MATERIALS ; THERMAL-ENERGY STORAGE ; LOAD REDUCTION ; HEAT-TRANSFER ; CONDUCTIVITY ; ENHANCEMENT ; COMPOSITE ; BUILDINGS ; BEHAVIOR |
| 资助项目 | Department of the Built Environment, College of Design and Engineering, National University of Singapore[E-471-00-0009-02] |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001165327000001 |
| 出版者 | ELSEVIER |
| 资助机构 | Department of the Built Environment, College of Design and Engineering, National University of Singapore |
| 源URL | [http://ir.giec.ac.cn/handle/344007/40952]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Kua, Harn Wei |
| 作者单位 | 1.Natl Univ Singapore, Coll Design & Engn, Dept Built Environm, Singapore 117566, Singapore 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Changsha Univ Sci & Technol, Sch Civil Engn, Changsha 410114, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiong, Teng,Kua, Harn Wei,Shah, Kwok Wei,et al. Graphene nanoplatelets and copper foams for improving passive cooling performance of PCMs in Singapore's tropical climate[J]. JOURNAL OF ENERGY STORAGE,2024,80:20. |
| APA | Xiong, Teng,Kua, Harn Wei,Shah, Kwok Wei,Hussein, Ghasan Fahim,&Zhang, Bai.(2024).Graphene nanoplatelets and copper foams for improving passive cooling performance of PCMs in Singapore's tropical climate.JOURNAL OF ENERGY STORAGE,80,20. |
| MLA | Xiong, Teng,et al."Graphene nanoplatelets and copper foams for improving passive cooling performance of PCMs in Singapore's tropical climate".JOURNAL OF ENERGY STORAGE 80(2024):20. |
入库方式： OAI收割
来源：广州能源研究所
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