摘要
为实现碳中和、碳达峰目标,需要提高能源转化效率。纳米流体作为一种高效传热工质,在最近20多年受到广泛关注。然而纳米流体稳定性差,在诸多领域的应用中受到限制。为提高纳米流体稳定性,实现大规模应用,通过对关于提高纳米流体稳定性的文献进行汇总分析,提出可通过调节纳米流体的pH值来控制其离子浓度达到合适的值;添加表面活性剂提高纳米颗粒间的排斥力;利用超声技术可以将纳米颗粒团簇分解;利用混合纳米颗粒之间的分子力可以改善纳米流体的稳定性。这些方法有助于解决纳米流体在长期应用时存在的稳定性低的问题。
To achieve the goal of carbon neutralization and carbon peak,energy conversion efficiency needs to be improved.Nanofluids,as efficient heat transfer mediums,have attracted extensive attention in recent 20 years.However,the poor stability of nanofluids limit their applications in many fields.To improve the stability and promote the large-scale application of nanofluids,by summarizing the related literature,a method which can control the ion concentrations at their proper values by adjusting nanofluid'pH value is proposed.Surfactants can improve the repulsion between nanoparticles.Nanoparticle clusters can be decomposed by ultrasonic technique.The intermolecular forces between mixed nanoparticles can be utilized to improve nanofluids'stability.These methods help to solve the problem of low stability of nanofluids in long-term applications.
作者
熊亚选
宋超宇
药晨华
王慧慧
王辉祥
胡子亮
吴玉庭
丁玉龙
XIONG Yaxuan;SONG Chaoyu;YAO Chenhua;WANG Huihui;WANG Huixiang;HU Ziliang;WU Yuting;DING Yulong(Key Laboratory of HVAC,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Ministry of Education,Beijing University of Technology,Beijing 100124,China;Birmingham Center for Energy Storage,University of Birmingham,Birmingham B152TT,UK)
出处
《华电技术》
CAS
2021年第7期68-74,共7页
HUADIAN TECHNOLOGY
基金
北京市教委科研项目(KM201910016011)。
关键词
纳米流体
储能
纳米熔盐
表面活性剂
超声振荡
碳中和
nanofluid
energy storage
nano-molten salt
surfactant
ultrasonic oscillation
carbon neutrality
