PDF(Pubmed)
Abstract：
This study presents new ionanofluids (INF) composed of 1-ethyl-3-methylimidazolium acetate ionic liquid (IL) and graphene oxide (GO) nanoparticles which have been assessed for the first time in an experimental flat plate solar thermal collector (FPSC). For this purpose, four types of INFs were synthesized, maintaining a constant concentration of GO nanoparticles dispersed in different base fluids: ionic liquid (IL/GO), a mixture of ionic liquid and water in varying concentrations (IL-water (75-25)%/GO and IL-water (50-50)%/GO), and water (Water/GO). These four INFs were characterized and their thermophysical and physicochemical properties were determined. The results indicated a 37.4% improvement in efficiency and up to a 2.5-fold increase in temperature within the collector when the IL was applied exclusively as the base fluid, compared to water. Furthermore, IL/GO demonstrated excellent stability, showing no signs of deterioration or nanoparticle precipitation two years after preparation and testing. These findings suggest that INFs based on IL and GO nanoparticles significantly enhance the efficiency of FPSC, presenting a promising option for solar energy applications and opening a new research avenue for INFs in the production of domestic hot water.
摘要：
这项研究提出了由1-乙基-3-甲基咪唑鎓乙酸离子液体（IL）和氧化石墨烯（GO）纳米颗粒组成的新型离子流体（INF），首次在实验性平板太阳能集热器（FPSC）中进行了评估。为此,合成了四种类型的INF，保持分散在不同基础流体中的GO纳米颗粒的恒定浓度：离子液体（IL/GO），不同浓度的离子液体和水的混合物（IL-水（75-25）％/GO和IL-水（50-50）％/GO），和水（水/GO）。对这四种INF进行了表征，并确定了它们的热物理和理化性质。结果表明，当仅将IL用作基础流体时，效率提高了37.4％，收集器内的温度提高了2.5倍。与水相比。此外，IL/GO表现出优异的稳定性，在制备和测试两年后没有表现出恶化或纳米颗粒沉淀的迹象。这些发现表明，基于IL和GO纳米颗粒的INF显着提高了FPSC的效率，为太阳能应用提供了一个有前途的选择，并为家庭热水生产中的INF开辟了一条新的研究途径。
