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集中式太阳能发电厂的热交换器的陶金属复合材料
M Caccia1, M Tabandeh-Khorshid1, G Itskos1
1School of Materials Engineering, Purdue University, West Lafayette, IN, USA.
Nature
|October 19, 2018
概括
研究人员开发了一种用于集中式太阳能发电厂的新型陶金属复合热交换器. 这种材料可以提高工作温度,提高发电效率,降低清洁能源生产成本.
科学领域:
- 材料科学
- 可再生能源工程
- 热力学
背景情况:
- 集中式太阳能发电厂可以通过在更高的温度下运行轮机来提高发电效率.
- 目前的CSP系统受限于热力交换器的热力性能,特别是使用超临界二氧化碳 (sCO2) 循环的热交换器.
- 更高的运行温度需要能够承受极端条件的先进换热器材料.
研究的目的:
- 开发和评估用于CSP应用的高温热交换器的新型复合材料.
- 在sCO2再压缩周期中克服现有的金属合金热交换器的局限性.
- 提高轮机进气温度以提高CSP效率并减少温室气体排放.
主要方法:
- 使用具有成本效益的化学转换工艺制造碳化 (ZrC) 和 (W) 复合热交换机板.
- 复合材料的高温热,机械和化学性能.
- 在高温和高压下测试超临界二氧化碳 (sCO2) 的耐腐蚀性,并对表面进行修改和添加CO.
主要成果:
- 这种ZrC/W复合材料在高温下表现出很好的性能,在1073K时的故障强度超过350MPa.
- 复合材料的导热率在1073K时是传统的铁或合金的2-3倍.
- 在sCO2中耐腐蚀是通过铜结合和CO添加而实现的,使其能够在1023K以上运行.
结论:
- 开发的ZrC/W复合材料是用于在sCO2循环中运行在1023K以上的印刷电路换热器的坚固材料.
- 与超级合金替代品相比,这些热交换器提供了更高的性能和更低的成本.
- 这种进步有助于从集中太阳能发电中产生更具竞争力和可持续的电力.
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