Melting process investigation of phase change materials in a shell and tube heat exchanger enhanced with heat pipe
Melting process investigation of phase change materials in a shell and tube heat exchanger enhanced with heat pipe
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DOI：
10.1016/j.renene.2019.01.110
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发表时间：
2019-08
期刊：
影响因子：
8.7
通讯作者：
Armin Ebrahimi;M. Hosseini;A. Ranjbar;M. Rahimi;R. Bahrampoury
中科院分区：
文献类型：
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作者：
Armin Ebrahimi;M. Hosseini;A. Ranjbar;M. Rahimi;R. Bahrampoury
在这项研究中，潜热存储与热管增强检查。热流体输送管是U形的，以提高传热规格。分析了管数和管板角度的影响，这至少需要检查十三个模型。RT-35作为相变材料，水作为热的传热流体（HTF）流过U形管。模型中采用了孔隙度-孔隙度模型来考虑相变。计算了不同工况下的液相率、相变材料温度、热流密度、热管输入热量以及热管进出口温差。结果表明，在单管蓄热系统周围布置热管，熔化时间可缩短91%。还观察到，对于30 °的管装置角度，通过将HTF管的数量增加到两个和三个，熔化时间减少高达12%。而双管和三管情况下的熔化时间几乎相同。这种减少对于90 °板角的双管是17%，对于相同情况的三管是24%。随着HTF板的角度增加，熔化时间减少。
In this study, latent heat storage enhanced with heat pipes is examined. The hot fluid carrying tubes are U shaped to improve heat transfer specifications. The effect of the number of the tubes as well as the angle of the tubes’ plates are analyzed which necessitates the examination of at least thirteen models. RT-35 is applied as the phase change material and water as the hot heat transfer fluid (HTF) flows through the U-shaped tube. The enthalpy-porosity is applied to consider phase change within the model. Liquid fraction, phase change material temperature, heat flux, the heat input of the heat pipe and the temperature differences between the HTF inlet and outlet are described for the studied cases. Results indicate that by locating the heat pipe around the single pipe heat storage system, the melting time reduces up to 91%. It is also observed that for the tube plant angle of 30°, by increasing the number of HTF tubes to two and three, the melting time reduces up to 12%. While the melting times for the double-tube and triple-tube cases are almost the same. This reduction for double-pipe of 90° plate angle is 17% and for the triple-pipe of the same case is 24%. As the angle of the HTF plate rises the melting time reduces.