中文摘要：

为了与低阶段变化温度获得合适的阶段变化材料(脉冲编码调制) 并且改进它的热转移，评价，试验性的调查被进行。第一， lauric 酸(LA ) 的不同集体比率和硬脂的酸(SA ) 最容易溶解的混合物被微分扫描准备并且描绘热量测定(DSC ) 。然后，最容易溶解的混合的性能处于水平状况在不同入口温度热转移液体(HTF ) 下面在在收费并且排出期间处于垂直状况，和性能在不同的鳍宽度下面控告进程期间处理分别地被调查。结果表明 LA-SA 最容易溶解的混合让合适的阶段改变温度并且为加热系统的低温度的水地板需要潜伏的热。宽鳍和高入口温度 HTF 显著地提高了转移率并且减少融化的时间。

英文摘要：

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.