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Investigation of bypass fluid flow in an active magnetic regenerative liquefier

机译:活性磁再生液化中旁路流体流动的研究

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Active magnetic regenerators (AMR) with second order magnetocaloric materials operating below the Curie temperature have a unique property where the magnetized specific heat is lower than the demagnetized specific heat. The associated thermal mass imbalance allows a fraction of heat transfer fluid in the cold heat exchanger to bypass the magnetized regenerator. This cold bypassed fluid can precool a process stream as it returns to the hot side, thereby increasing the efficiency of liquefaction and reducing the cost of liquid cryogens. In the present work, the net cooling power of an active magnetic regenerative liquefier is investigated as a function of the bypass flow fraction. Experiments are performed at a fixed temperature span yielding a 30% improvement in net cooling power, affirming the potential of bypass flow in active magnetic regenerative liquefiers.
机译:主动磁性再生器(AMR)具有下面的居里温度下方的二阶磁热材料具有独特的特性,其中磁化特定热量低于去磁的特异性热量。 相关的热质量不平衡允许冷热换热器中的传热流体分数绕过磁化再生器。 这种冷旁路流体可以在返回热侧时预制过程流,从而提高液化效率并降低液体冷冻液的成本。 在本作工作中,作为旁通流程部分的函数研究了主动磁再生液位的净冷却功率。 实验在固定温度跨度下进行,净冷却功率的提高30%,肯定旁通流动在主动磁再生液中的电位。

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