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【期刊论文】CONDENSATION HEAT TRANSFER OF R-134A FLOW INSIDE HELICAL PIPES AT DIFFERENT ORIENTATIONS
韩吉田, B. Yu, J.T. Han, H.J. Kang, C.X. Lin, A. Awwad, and M.A. Ebadian*
Int. Coom. Heat Mass Transfer, Vol.30, No.6, pp. 745-754, 2003,-0001,():
-1年11月30日
This paper presents an experimental investigation of condensation heat transfer of alternative refrigerant R-134a flowing inside a helical pipe with cooling water through the concentric annular passage in a counter-flow direction. The experiments were conducted with the helix axis of the test section in horizontal, vertical, and inclined orientation directions, respectively. The mass flow flux for R-134a ranges from 100 to 400kg/m2s and the Reynolds number of cooling water ranges from 1500 to 10000. The results demonstrate the orientation of helical pipe has a significant effect on both refrigerant-side heat transfer and overall heat transfer coefficients.
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【期刊论文】Condensation heat transfer of r-134a flow inside helical pipes at different orientations
韩吉田
,-0001,():
-1年11月30日
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【期刊论文】Condensation heat transfer and pressure drop characteristics of R-134a in annular helical pipe
韩吉田
,-0001,():
-1年11月30日
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韩吉田, 王振
武汉理工大学学报,2006,28:515~521,-0001,():
-1年11月30日
发展了一种质子交换膜燃料电池(PEMFC)动态建模和仿真的方法。通过对电池稳态经验模型的扩展,运用MATLAB的SIMULINK仿真工具建立了质子交换膜燃料电池动态仿真模型,研究了电堆的运行参数对电池输出性能的影响,仿真结果与实验数据吻合较好。该方法可以用于燃料电池的分析、优化设计以及电池系统的实时控制。
质子交换膜燃料电池, 建模, 动态仿真, SIMULINK
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