酸六水合物伪状的eutectics用于近室温的热能储存热能储存
Sophia Ahmed1, Denali Ibbotson1, Chase Somodi1
1Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States.
概括
新的酸基盐水合物提供稳定,低成本的热能储存在室温附近. 添加石粉可以显著降低低冷却效率,提高它们在建筑应用中的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 固态盐水合物是用于储存热能的成本效益高的相变材料 (PCM),但往往缺乏室温附近的一致化.
- 欧特克盐水合物能够定制点,但它们的固化行为和长期稳定性尚不清楚.
- 超稳固固化和相分离是欧特克盐水合物系统的挑战.
研究的目的:
- 开发新型,低成本的欧盐水合物,用于室温附近的热能储存.
- 为了研究这些新的eutectic的凝固行为,低冷却和热稳定性.
- 为了确定减轻酸基欧系统中低冷的策略.
主要方法:
- 用酸,酸,酸和酸为酸-六酸基的欧盐水合物的合成和表征.
- 差分扫描热量计 (DSC) 用于确定欧特克融温度和热量.
- 低冷实验,有或没有添加矿物石.
- 长期热循环测试,以评估材料的稳定性.
主要成果:
- 开发出了三种新型的环保系统:Zn(NO3) 2·6 ((H2O) -NaNO3 (32.7 °C),Zn(NO3) 2·6 ((H2O) -KNO3 (22.1 °C),以及Zn(NO3) 2·6 ((H2O) -NH4NO3 (11.2 °C).
- 地质矿物塔尔克被确定为一种有效的核化剂,在所有测试的eutectic中显著减少低冷却.
- 开发的以酸为基础的eutectic表现出稳定性超过100个热循环在毫升尺度.
结论:
- 基于酸的欧盐水合物为设计具有成本效益的,接近室温的相变材料提供了可行的途径.
- 添加滑石有效抑制低冷,这对于可靠的固化和储能性能至关重要.
- 这些材料有望成为建筑物中热能储存的坚固和稳定的介质.
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