Photothermal Energy Conversion in Nanofluids

纳米流体中的光热能转换

• 批准号: 0932720
• 负责人: Ronald Adrian
• 金额: $ 32.5万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0932720&HistoricalAwards=false
• 关键词: Photothermal; Energy; Conversion; Nanofluids

AWARD ABSTRACT0932720PhelanThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The interaction of thermal radiation with nanofluids, which are nanoscale colloidal suspensions, has not been extensively examined. This research deals with fundamental thermal transport phenomena that occur when sufficiently intense thermal radiation is incident upon a nanofluid. Specifically, the irradiation will cause localized heating of the suspended nanoparticles, and, in turn, induce heating or boiling of the liquid. This proposal addresses the relevant phenomena through a series of experiments and analyses. Intellectual Merit. This research addresses questions such as the rate at which suspended nanoparticles selectively absorb thermal irradiation. A large component of the research is aimed at determining whether a vapor bubble nucleates from a heated nanoparticle in the same manner as compared to from a heated surface. Hence, determination of the incident radiative flux necessary to initiate boiling will be achieved. The temperatures obtained by the nanoparticles in response to the thermal irradiation, and the level of superheat required to initiate boiling at the surface of the nanoparticle will be determined. The optimum nanofluid particle size and particle loading distributions to maximize solar absorption while concurrently minimizing long-wavelength emission, will be sought. Broader Impacts. A promising application development of nanofluid-based, direct-absorption solar thermal collectors with efficiencies higher than conventional solar collectors. This may lead to cost effective and efficient solar energy collection systems. Furthermore, the initiation and control of novel chemical reactions may be brought about by irradiating unique nanofluids. High school students will be engaged in solar-energy-based science projects. Teaching modules will be developed for undergraduate students. An effort to involve and inform the general public regarding solar energy research and development will be made through publishing opinion and editorial articles in the popular media.

摘要摘要0932720 Phelanthis Award是根据2009年的《美国回收与再投资法》（公法111-5）资助的。尚未广泛检查热辐射与纳米流体的相互作用，即纳米级胶体悬架。 这项研究涉及当足够强烈的热辐射出现在纳米流体上时发生的基本热传输现象。具体而言，辐照将导致悬浮的纳米颗粒的局部加热，然后诱导液体加热或沸腾。该建议通过一系列实验和分析来解决相关现象。 智力优点。 这项研究解决了诸如悬浮纳米颗粒选择性吸收热照射的速率之类的问题。研究的很大一部分旨在确定与加热表面相比，蒸气气泡是否以与加热纳米颗粒相同的方式来确定。因此，将确定启动沸腾所需的入射辐射通量。纳米颗粒响应热照射而获得的温度将确定在纳米颗粒表面沸腾所需的过热水平。 将寻求最佳纳米流体粒径和颗粒载荷分布，同时最大程度地减少长波长发射。更广泛的影响。 基于纳米流体的直接吸收太阳能收集器的有前途的应用开发，其效率高于传统太阳能收集器。 这可能会导致具有成本效益和高效的太阳能收集系统。此外，可以通过照射独特的纳米流体来引起新的化学反应的起始和控制。高中生将从事基于太阳能的科学项目。将为本科生开发教学模块。 将通过流行媒体中的发表意见和编辑文章来涉及和通知公众有关太阳能研发的信息。