SGER: Development of Nanoemulsion Fluids with Enhanced Properties

奖项编号：0711095标题：SGER：开发具有增强性能的纳米乳液流体名称：鲍阳研究所：马里兰大学学院简介该项目旨在通过开发和研究一种新型的流体纳米乳液流体，其中使用液体纳米液滴来改善基础流体的热性能，来克服最先进的传热流体的障碍。这种流体有望为热应用提供前所未有的高度可取特征的组合，包括高导热系数、高热容、长期稳定性和大规模生产能力。这项拟议的工作将建立在初步实验结果的基础上，这些结果表明，在FC72水包水纳米乳化液中，12vol%的纳米水滴(直径19.6 nm)的有效导热系数有异常大的改善，最高可提高52%。这项工作是首次对直径为100 nm的液体纳米液滴悬浮液在传热流体中的导热系数进行实验。智力价值：该项目的关键创新方面是将开发纳米乳状液并将其用作模型系统来探索纳米颗粒悬浮液中的热传输。各种可能影响这类流体热物性的重要因素，包括颗粒迁移率、颗粒大小和颗粒分布不均匀，将被系统地研究，以解决在纳米颗粒悬浮液中观察到的长期争论的导热增强机制。将探索使用相变材料(PCM)作为纳米液滴，以同时提高基础流体的有效导热系数和热容。将研究各种相变材料和基础流体，以确定适合热应用的相变材料纳米乳液系统。广泛的影响：改善导热流体的热性能将在广泛的行业中大幅提高能效。一名研究生和一名助理教授将得到这个项目的支持，本科生将通过将纳米乳状液引入本科传热学实验室课程来接触到这项工作。

Award Number: 0711095Title: SGER: Development of Nanoemulsion Fluids with Enhanced PropertiesName: Bao YangInstitution: University of Maryland College ParkABSTRACTThis project aims to overcome barriers of state-of-the-art heat transfer fluids through developing and investigating a new type of fluid nanoemulsion fluids in which liquid nanodroplets are used to improve the thermal properties of the base fluids. Such fluids are expected to provide an unprecedented combination of highly desirable features for thermal applications, including high thermal conductivity, high heat capacity, long-term stability, and mass-production ability. This proposed effort will build on preliminary experimental results that demonstrate an unusually large improvement in the effective thermal conductivity up to a 52% increase for 12 vol % of water nanodroplets (19.6nm in diameter) in water-in-FC72 nanoemulsion fluids. This work represents the first experiments on the thermal conductivity of suspensions of liquid nanodroplets (100nm in diameter) in heat transfer fluids.Intellectual Merit: The key innovative aspects of the project are that nanoemulsion fluids will be developed and used as model systems to probe thermal transport in suspensions of nanoparticles. Various important factors that potentially affect thermal properties of such fluids, including particle mobility, particle size, and nonuniform distribution of particles, will be systematically investigated to address the long-debated mechanisms of thermal conductivity enhancement observed in suspensions of nanoparticles. The use of Phase Change Materials (PCMs) as nanodroplets will be explored to simultaneously improve the effective thermal conductivity and heat capacity of the base fluids. Various PCMs and base fluids will be investigated for determining PCM nanoemulsion systems suitable for thermal applications.Broader Impacts: Improving the thermal properties of heat transfer fluids would result in substantial energy efficiency improvements across a wide range of industries. A graduate student and an assistant professor will be supported by this project, and undergraduate students will be exposed to this work by introducing nanoemulsion fluids into an undergraduate heat transfer laboratory course.