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基于磁性纳米流体的直接吸收式太阳能集热器的集热性能

DOI: 10.7521/j.issn.0454-5648.2014.04.16

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Abstract:

采用磁性纳米流体(MNF)作为直接吸收式太阳能集热器(DASC)的工作介质并研究了其集热性能。将通过超声辅助共沉淀法合成的Fe3O4纳米颗粒分散在乙二醇(E-G)中制备MNF。采用该MNF作为DASC的工作介质时,集热器的导热效率比单纯采用E-G作为工作介质时高,并且可在较低体积分数的条件下获得较高的导热效率。在工作介质的入口处添加磁场可以提高其导热效率。磁场和MNF的协同作用有利于提高DASC系统的集热效率。

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