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首页> 外文会议>7th international conference on magnetic refrigeration at room temperature >OPTIMIZATION OF HEAT EXCHANGE IN MAGNETIC REFRIGERATORS AND THERMOMAGNETIC MOTORS
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OPTIMIZATION OF HEAT EXCHANGE IN MAGNETIC REFRIGERATORS AND THERMOMAGNETIC MOTORS

机译：磁制冷机和热磁电机的换热优化

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摘要

The power and efficiency of magnetic refrigerators and thermomagnetic motors depend on their operating frequencies. To improve the efficiency of these machines, it is necessary to design the regenerators/heat exchangers so to present heat transfer as high as possible, allowing higher operational frequencies. In several machines, a fluid flowing through internal channels promotes the heat transfer. In such cases, as the temperature difference governing heat transfer decreases along the channels length, the heat transfer also decreases. One solution for this problem is the use of non-linear heat transfer area increase along the channels. That can be done by changing the cross section area or the profile of the channels. This study presents an experimental analysis that shows the effectiveness of this technique by comparing heat exchangers with cylindrical, conical and non-prismatic shaped internal channels using infrared thermography.
机译：磁性冰箱和热磁电动机的功率和效率取决于其工作频率。为了提高这些机器的效率，有必要设计回热器/热交换器，以便表现出尽可能高的热传递，从而允许更高的工作频率。在一些机器中，流经内部通道的流体促进了热传递。在这种情况下，随着控制传热的温度差沿通道长度减小，传热也减小。解决该问题的一种方法是利用沿通道增加的非线性传热面积。这可以通过更改横截面积或通道轮廓来完成。这项研究提出了一项实验分析，通过使用红外热像仪比较具有圆柱形，圆锥形和非棱柱形内部通道的热交换器，显示了该技术的有效性。

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