论文部分内容阅读
采用SEM和X射线能谱仪分析方法研究了50次热循环后Ba(OH)2·8H2O与铝合金和紫铜的相容性,发现Ba(OH)2·8H2O对铝合金有一定的腐蚀性,与紫铜具有优良的相容性。以简单的真空吸附填充方法制备了Ba(OH)2·8H2O/泡沫铜相变复合材料。搭建了含和未含泡沫铜相变储能装置实验台,对Ba(OH)2·8H2O/泡沫铜相变复合材料进行室温下稳态和瞬态的传热实验。结果表明:Ba(OH)2·8H2O/泡沫铜相变复合材料比纯Ba(OH)2·8H2O传热速率快,导热性能好,有效地降低了Ba(OH)2·8H2O的过冷度。高温恒温箱的传热实验表明:Ba(OH)2·8H2O/泡沫铜相变复合材料的蓄热能力随外界环境温度的升高而降低,当环境温度高于材料相变点温度时,应考虑对相变复合材料采取一些保温措施。
The compatibility of Ba (OH) 2 · 8H2O with aluminum alloy and copper after 50 thermal cycles was studied by SEM and X-ray energy dispersive spectroscopy. It was found that Ba (OH) 2 · 8H2O had some corrosive effect on aluminum alloy , And copper has excellent compatibility. Ba (OH) 2 · 8H2O / foamed copper phase transformation composite was prepared by a simple vacuum adsorption method. The experiment bench of phase change energy storage device with and without foam copper was set up, and the steady state and transient heat transfer experiments of Ba (OH) 2 · 8H2O / foam copper phase change composites were carried out at room temperature. The results show that Ba (OH) 2 · 8H2O / foam copper phase transformation composite has faster heat transfer rate than pure Ba (OH) 2 · 8H2O and good thermal conductivity, which effectively reduces the undercooling degree of Ba (OH) 2 · 8H2O . Heat transfer experiments show that: Ba (OH) 2 · 8H2O / foam copper composite thermal storage capacity decreases with the increase of ambient temperature, when the ambient temperature is higher than the temperature of the material transformation point, should Consider some thermal insulation for phase change composites.