Thermal Characterization of Lauric Acid and Stearic Acid Binary Eutectic Mixture in Latent Heat Thermal Storage Systems with Tube and Fins

丁磊^1,2，WANG Lixiong¹，Georgios Kokogiannakis²，Lü Yajun³，周卫兵⁴

1. School of Architecture, Tianjin University2. Sustainable Buildings Research Centre, University of Wollongong3. School of Architecture, North China University of Water Resources and Electric Power4. School of Materials Science and Engineering, Wuhan University of Technology

摘 要：In order to obtain the suitable phase change material（PCM） with low phase change temperature and improve its heat transfer rate, experimental investigation was conducted. Firstly, different mass ratios of lauric acid（LA） and stearic acid（SA） eutectic mixtures were prepared and characterized by differential scanning calorimetry（DSC）. Then, the performance of eutectic mixture during charging process under different fin widths in vertical condition, and performance during charging and discharging processes under different inlet temperature heat transfer fluid（HTF） in horizontal condition were investigated, respectively. The results revealed that the LA-SA eutectic mixture had the suitable phase change temperature and desired latent heat for low-temperature water floor heating system. Wide fins and high inlet temperature HTF significantly enhanced the transfer rate and decreased the melting time.

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