Optimization of micro-finned tubes in double pipe heat exchangers using particle swarm algorithm
Optimization of micro-finned tubes in double pipe heat exchangers using particle swarm algorithm
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DOI：
10.1016/j.applthermaleng.2017.03.025
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发表时间：
2017-06
影响因子：
6.4
通讯作者：
M. Dastmalchi;G. Sheikhzadeh;A. Arefmanesh
中科院分区：
文献类型：
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作者：
M. Dastmalchi;G. Sheikhzadeh;A. Arefmanesh
在这项研究中，采用粒子群优化方法来确定最佳的微翅片的几何形状，使最大限度地提高微翅片管的热效率在双管换热器。所考虑的微肋管的决策变量为微肋数（10 ~ 60）、微肋高度（0.0 ~ 0.5mm）和微肋螺旋角（5 ~ 30°）。研究的雷诺数范围为3 × 10 ~ 3 ~ 10 ~ 5，管内径为5、10、15 mm。湍流流动的控制方程数值求解采用商业软件包ANSYS CFX V.15。通过对水在微肋管中非等温流动的数值模拟结果与文献中的实验结果进行比较，验证了数值方法的有效性。仿真结果，然后在粒子群优化算法优化微鳍的几何形状。结果表明，最佳微肋高度随雷诺数的增加而增加。然而，对于最佳螺旋角观察到相反的趋势。
In this study, a particle swarm optimization approach is employed to determine the optimal micro-fin geometry which maximizes the thermal efficiency of micro-finned tubes in the double pipe heat exchangers. The considered decision variables of the micro-finned tubes are the number of micro-fins which various from 10 to 60, the micro-fin height varying from 0.0 to 0.5 mm, and the micro-fin helix angle which is between 5 and 30°. The study is conducted for the Reynolds number ranging from 3 × 103to 105and for the inner diameter of the tube equal to 5, 10, 15 mm. The governing equations for the turbulent fluid flow are solved numerically employing the commercial software package ANSYS CFX v.15. The numerical procedure is validated by comparing the simulation results for the non-isothermal flow of water through a micro-finned tube with the experimental results from the literature. The simulation results are then employed in the particle swarm optimization algorithm to optimize the micro-fin geometry. The results indicate that the optimum micro-fin height increases with increasing the Reynolds number. However, the opposite trend is observed for the optimal helix angle.