Heat transfer performance of hollow aluminium structure filled with PCM

doi:10.11949/j.issn.0438-1157.20161417

Abstract

Abstract:

The transient thermal performances of hollow aluminium structure filled with PCM (phase change material) are experimentally studied. The effects of related parameters with porosity and hole diameter are discussed. Results show that the heat transfer process can be divided into three stages, including the sensible heat region before melting, the melting region, and the sensible heat region after melting. The temperature control time for sample with PCM is 2.5 times than that without PCM due to the absorption of latent heat in the melting region. The sample with higher porosity or higher hole diameter behaves the larger temperature difference between heated and back surfaces, and also the longer melting duration time.

Key words: phase change, heat transfer, transient response, hollow aluminium structure, PCM, porosity

摘要：

实验研究了空心铝合金结构承载件内部填充相变材料的非稳态换热特征，通过测试试件加热面与背热面的温度响应分析了孔隙率、孔径等因素对换热过程的影响规律。研究结果表明：填充石蜡试件的换热过程可划分为熔化前显热区间、熔化区间、熔化后显热区间3个阶段；熔化区间的潜热吸收使得试件填充石蜡时的温控时间可达到不填充石蜡时的2.5倍；试件孔隙率越大或孔径越大，则其加热面与背热面的温差越大，熔化时间越长。

关键词: 相变, 传热, 瞬态响应, 空心铝合金结构, 相变材料, 孔隙率

CLC Number:

TK124

ZHANG Jiajie, QU Zhiguo, MA Suxia, YANG Yanxia. Heat transfer performance of hollow aluminium structure filled with PCM[J]. CIESC Journal, 2017, 68(5): 1845-1851.

张嘉杰, 屈治国, 马素霞, 杨艳霞. 空心铝合金结构填充相变材料的换热特性[J]. 化工学报, 2017, 68(5): 1845-1851.

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