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为了探索Al-Si合金储能材料在太阳能聚光热发电中的应用,配制了3种成分的Al-Si合金,进行1200次热循环实验,并通过差示扫描量热仪(DSC)等分析其热物理性能变化。再搭建Al-Si合金与水蒸气换热的实验平台,对水蒸气和Al-Si合金释热换热过程进行实验,分析在不同流量下水蒸气的换热情况。实验结果表明:Al-Si合金被加热到620℃时,水蒸气流速为0.4g/s时,出口温度最高442℃,同时拟合分析得出努塞尔数准则式。
In order to explore the application of Al-Si alloy energy storage materials in solar concentrating thermal power generation, three kinds of Al-Si alloys were prepared and subjected to 1200 thermal cycling experiments and analyzed by differential scanning calorimetry (DSC) Its thermal physical properties change. The experiment platform of Al-Si alloy and water vapor heat exchange was set up to test the heat release and heat transfer process of water vapor and Al-Si alloy. The heat transfer of water vapor at different flow rates was analyzed. The experimental results show that when the Al-Si alloy is heated to 620 ℃, the maximum outlet temperature is 442 ℃ when the water vapor velocity is 0.4g / s, and the Nusselt number criterion formula is obtained by fitting analysis.