Investigation of thermo-fluidic performance of phase change material slurry and energy transport characteristics
Investigation of thermo-fluidic performance of phase change material slurry and energy transport characteristics
复制标题
相变材料浆料热流性能及能量传输特性研究
DOI：
10.1016/j.apenergy.2017.08.146
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发表时间：
2017-08
期刊：
影响因子：
11.2
通讯作者：
X.J. Shi
中科院分区：
文献类型：
--
作者：
F. Ma;P. Zhang;X.J. Shi
蓄热或蓄冷是缓解电力负荷峰谷差、提高能源利用效率的有效途径。利用微胶囊相变材料（MPCM）浆料蓄热或蓄冷，由于其高的储能密度和优良的传热性能，是余热回收、传热等系统中实现蓄冷的有效措施之一。基于欧拉-欧拉方法，对恒热流下MPCM浆料在水平圆管中的流动特性进行了数值研究。结果表明，数值计算结果与实验结果在流动和传热方面具有较好的一致性。在等温条件下，研究了颗粒直径对MPCM浆料固相体积分数分布、固相速度分布和压降的影响。通过对MPCM浆料的温度分布和浆料中PCM的液相体积分数的测量，分析了MPCM浆料的传热性能。粒径对MPCM浆料的两相传热和平均传热系数也有显著影响。当MPCM粒径减小到1 μm时，压降和平均传热系数最大。进一步研究了不同雷诺数下局部换热系数沿着向的变化规律。最后，基于输送热量与泵送功率的比值，比较了MPCM浆体与水的能量输送性能。当雷诺数大于7865时，MPCM浆料的能量传输性能优于纯水。
Thermal or cold storage is a promising way to alleviate the peak-valley difference of the electricity load and improve the energy efficiency. The thermal or cold storage by micro-encapsulated phase change material (MPCM) slurry is one of the effective measures to be implemented in waste heat recovery and heat transport system etc. due to its high energy storage density and excellent heat transfer performance. The thermo-fluidic performances of the MPCM slurry flowing through the horizontally circular pipe under constant heat flux are numerically investigated based on the Eulerian-Eulerian approach in the present study. It is found that the numerical results are in good consistence with the experimental results from the aspects of flow and heat transfer. The influences of particle diameter on solid volume fraction distribution, solid velocity distribution and pressure drop of the MPCM slurry are investigated under isothermal condition. And then the temperature distribution of the MPCM slurry and liquid volume fraction of the PCM in MPCM are presented to analyze the heat transfer performance of the MPCM slurry. The particle diameter also imposes significant influences on the heat transfer between the two phases and average heat transfer coefficient of the MPCM slurry. The largest pressure drop and the highest average heat transfer coefficient appear when the particle diameter of the MPCM decreases to 1 μm. Further investigations at different Reynolds numbers are carried out to study the variation of local heat transfer coefficient along the pipe. Finally, the comparison of energy transport performances between the MPCM slurry and water are presented based on the ratio of transported heat to pumping power. The MPCM slurry shows better energy transport performance than pure water when the Reynolds number is above 7865.
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DOI：
10.1016/j.ijheatmasstransfer.2013.03.013
发表时间：
2013-07
影响因子：
5.2
作者：
Si-hong Song;Q. Liao;W. Shen;Ruan Yu;Jiafeng Xu-
通讯作者：
Si-hong Song;Q. Liao;W. Shen;Ruan Yu;Jiafeng Xu-
影响因子：
4.7
作者：
Jiang, Y.Y.;Zhang, P.
通讯作者：
Zhang, P.
影响因子：
11.2
作者：
Diaconu, Bogdan M.;Varga, Szabolcs;Oliveira, Armando C.
通讯作者：
Oliveira, Armando C.
气动悬浮法制备铁壳/铜核包覆金属相变材料
影响因子：
11.2
作者：
Ma, Bingqian;Li, Jianqiang;Xu, Zhe;Peng, Zhijian
通讯作者：
Peng, Zhijian
影响因子：
9
作者：
X. Shi;Pengfei Zhang
通讯作者：
X. Shi;Pengfei Zhang