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Forced convective heat transfer for laminar flow of paraffin: A numerical and experimental study | |
Qv, Dehu | |
2017 | |
发表期刊 | Applied Thermal Engineering |
卷号 | 113期号:/ |
摘要 | This study presents a numerical and experimental analysis of the forced convective heat transfer of paraffin, which is intended for use in environmental control systems (ECSs). The research concentrates on the heat transfer characteristics of paraffin in laminar flow. The results of the simulation present the relationship between the convective heat transfer coefficient (CHTC) and the tube length in the flow direction. It is determined that the CHTC of the paraffin undergoes a slight increase throughout its phase change stage (the corresponding material temperatures ranged from 291.15 K to 288.15 K). Compared with water, the value of the CHTC of paraffin is 9.8–10.7 times larger, depending on the flow rate of the fluid. For given values of the parameters tube length and inner diameter, there is an optimal flow velocity of the paraffin for heat flux enhancement. In the present work, the optimum flow velocity is 0.020 m/s. The maximal heat flux, in the meantime, reaches 465.1 W, which accounts for 58.2% of the total heat capacity of paraffin. The approach of using flowing paraffin in ECSs for thermal energy storage/transfer may be technically viable. In addition, the assumption that the flowing paraffin has been thermally fully developed in the heat transfer tube cannot be used for solving the energy equations. |
关键词 | Heat transfer characteristics Phase change stage Heat transfer enhancement Thermally fully developed Paraffin |
学科门类 | 工学 |
DOI | 10.1016/j.applthermaleng.2016.11.118 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/156651 |
专题 | 兰州理工大学 |
作者单位 | Harbin Institute of Technology |
推荐引用方式 GB/T 7714 | Qv, Dehu. Forced convective heat transfer for laminar flow of paraffin: A numerical and experimental study[J]. Applied Thermal Engineering,2017,113(/). |
APA | Qv, Dehu.(2017).Forced convective heat transfer for laminar flow of paraffin: A numerical and experimental study.Applied Thermal Engineering,113(/). |
MLA | Qv, Dehu."Forced convective heat transfer for laminar flow of paraffin: A numerical and experimental study".Applied Thermal Engineering 113./(2017). |
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