Experimental Analysis of a Capillary Pumped Loop for Terrestrial Application
Experimental Analysis of a Capillary Pumped Loop for Terrestrial Application
复制标题
地面应用毛细管泵环路的实验分析
DOI：
10.2514/1.t3715
复制
发表时间：
2011
影响因子：
2.1
通讯作者：
David Lossouarn
中科院分区：
文献类型：
--
作者：
V. Ayel;L. Lachassagne;Y. Bertin;C. Romestant;David Lossouarn
本文报道了一种用于地面应用的毛细管泵送回路（CPLTA）的实验研究，该回路使用乙醇、甲醇和正戊烷作为工作流体进行了测试。该CPLTA专为铁路集成电力电子冷却而设计，当充满甲醇时，能够传递超过5千瓦的总热功率。首先，在瞬态条件下进行的实验表明，该装置在所有测试条件下都具有很高的稳定性，特别是在恶劣的轨道循环方面。其次，稳态结果令人信服地表明，蒸发器的电导与二次流体温度无关，但与流体性质和储层饱和温度密切相关。通过计算蓄热器和蒸发器之间的压力差，对稳态条件下进行的所有试验的热力学运行曲线进行了理论分析；从这些曲线可以确定蒸发温度，以及仅限于单个蒸发器的电导，从而强调流体之间的差异。最后，这些结果证实了甲醇是此类装置中性能最好的流体，但由于与其他流体相比，正戊烷的密度较低，因此在应用最低热功率时也很有用。
This paper reports on an experimental study of a capillary pumped loop for terrestrial application (CPLTA) that has been tested using ethanol, methanol, and N-pentane as working fluids. This CPLTA, designed for integrated power electronics cooling in railways, is capable of transferring total heat power of more than 5 kWwhen filled with methanol. First, experiments carried out under transient conditions show the high stability of this device for all the conditions tested, particularly with regard to a harsh rail cycle. Second, steady-state results convincingly show that conductance of the evaporator is independent of secondary fluid temperature, but strongly dependent on the nature of the fluid and the saturation temperature at the reservoir. A theoretical analysis has been undertaken in order to establish the thermodynamic operating curves of all tests carried out in steady-state condition by calculating the pressure difference between the reservoir and the evaporator; from these curves onemay determine the evaporation temperature, as well as the conductance restricted to the single evaporator, thereby underscoring the differences between the fluids. Finally, these results confirm that methanol is the maximally performing fluid for such devices, but also that N-pentane is useful with regard to the lowest heat powers applied, due to its lower density when compared with other fluids.