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化工进展  2015 

不同工况下间接式蓄热器性能的实验研究及分析

DOI: 10.16085/j.issn.1000-6613.2015.08.010

Keywords: 相变,蓄热,传热,间接式,?,赤藻糖醇

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Abstract:

当前对于相变蓄热器性能的评价指标主要是蓄放热时间,比较单一,不能全面准确地评价蓄热器性能。本文设计了一种以赤藻糖醇作为相变材料的间接式蓄热器,并通过铜管外加双直肋的手段强化传热。在相变材料内部以及进出口设有热电偶,利用控制变量法,通过改变进口油温以及导热油流量来观测不同工况下蓄热器内部温度的变化以及进出口油温的变化,对不同工况下蓄热器的蓄热效率、放热稳定性进行了分析。为了对蓄热器的充放热性能作出更加全面的评价,对蓄热器进行了分析。结果表明在流量不变的情况下,随着温度的升高,蓄热效率基本相同,放热稳定性基本一致,效率增加;在温度不变的情况下,随着流量的增加,蓄热效率降低,放热稳定性减弱,效率降低。

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