Efficient solar-thermal energy conversion with surfactant-free Cu-oxide nanofluids
Efficient solar-thermal energy conversion with surfactant-free Cu-oxide nanofluids
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DOI：
10.1016/j.nanoen.2022.108112
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发表时间：
2022-12
期刊：
影响因子：
17.6
通讯作者：
H. Moghaieb;D. Padmanaban;R. McGlynn;A. Haq;C. Maddi;P. Maguire;D. Mariotti;Harjit Singh;Praveen Kumar;M. Arredondo
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文献类型：
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作者：
H. Moghaieb;D. Padmanaban;R. McGlynn;A. Haq;C. Maddi;P. Maguire;D. Mariotti;Harjit Singh;Praveen Kumar;M. Arredondo
高规格的纳米流体可以潜在地实现具有成本效益和高效的太阳能-热能转换。然而，它们的实施受到纳米颗粒的吸收光谱范围差和稳定性挑战的不利影响。在这里，我们展示了具有高光学吸收和长期稳定性的氧化铜纳米颗粒的合成，全面表征和应用。基于混合等离子体-液体非平衡电化学过程的合成方法确保了非常有限的环境影响，因为它依赖于固体金属前体，同时避免使用额外的化学品，如表面活性剂和其他还原剂。我们进一步研究了纳米流体性能与材料和光学性质之间的基本联系，并产生了一个理论模型来确定能量转换效率。结果表明，用我们的氧化铜纳米颗粒生产的纳米流体可以实现接近90%的卓越太阳能热转换效率，并可以为高效的太阳能热转换技术提供可行的解决方案。
High-specification nanofluids can potentially enable cost-effective and highly efficient solar-to-thermal energy conversion. However, their implementation is adversely affected by poor absorption spectral range and stability challenges of the nanoparticles. Here we demonstrate the synthesis, full characterization and application of Cu-oxide nanoparticles with high optical absorption and long-term stability over many months. The synthesis method, based on a hybrid plasma-liquid non-equilibrium electrochemical process, ensures a very limited environmental impact as it relies on a solid metal precursor while avoiding the use of additional chemicals such as surfactants and other reducing agents. We further investigate the fundamental links between the nanofluid performance and the material and optical properties and produce a theoretical model to determine the energy conversion efficiency. The results show that nanofluids produced with our Cu-oxide nanoparticles can achieve exceptional solar thermal conversion efficiencies close to ∼90% and can provide a viable solution for an efficient solar thermal conversion technology.