Thermal Emission beyond the Conventional Kirchhoff's Law

超越传统基尔霍夫定律的热发射

基本信息

  • 批准号:
    2314210
  • 负责人:
  • 金额:
    $ 35.13万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-09-01 至 2026-08-31
  • 项目状态:
    未结题

项目摘要

Thermal radiation is constantly exchanged between objects around us. The two fundamental properties to characterize the ability of an object to emit and receive thermal radiation is the emissivity and absorptivity, respectively. Kirchhoff’s law of thermal radiation, proposed by Kirchhoff in 1860, is considered to be the first of the laws of thermal radiation. Kirchhoff’s law establishes the fundamental equivalence between absorptivity and emissivity, and for over 150 years, it has been widely used in measuring and computing emissivity of thermal emitters. However, the validity of Kirchhoff’s law is not a requirement of thermodynamics, and it breaks down for nonreciprocal thermal emitters. Despite the great benefits of nonreciprocal thermal emitters in solar energy, heat rectification and circulation, the understanding of nonreciprocal thermal radiation is lacking. This project aims to demonstrate a new theory valid for all thermal emitters, including nonreciprocal ones. We refer to this theory as the generalized Kirchhoff’s law. Through the project, an integrated research/education program will be established at the University of Houston by creating new career opportunities for underrepresented groups and involving minority and female students as undergraduate and graduate research assistants. The PI will partner with Children's Museum Houston to create educational videos related to thermal science.From symmetry analysis, thermal emission processes in a thermal emitter could be directly connected to the absorption process of the adjoint system of the emitter. The goal of this project is therefore to develop a new generalized Kirchhoff’s law based on this overlooked connection. To do so, the project will directly demonstrate the breakdown of conventional Kirchhoff’s law through numerical modeling and experimental measurement. The same procedure will be applied to showcase the validity of the new generalized Kirchhoff’s law. There is a long-standing debate on whether the validity of Kirchhoff’s law is fundamentally backed up by thermodynamics or not. The result of the project will shed light on this fundamental question. Another merit of the project is establishing a theoretical modeling method for directly simulating nonreciprocal thermal radiation, providing a coherent theoretical framework to understand nonreciprocal thermal radiative heat transfer in far and near fields. Lastly, the new generalized Kirchhoff’s law will provide the missing metrology technique for studying nonreciprocal thermal radiation. The program will provide a new paradigm for understanding thermal radiation that is beyond the description of traditional Kirchhoff’s law, creating a new frontier in the thermal radiation field.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
热辐射在我们周围的物体之间不断交换。表征物体发射和接收热辐射能力的两个基本特性分别是发射率和吸收率。基尔霍夫热辐射定律由基尔霍夫于1860年提出,被认为是热辐射定律的第一个。基尔霍夫定律建立了吸收率和发射率之间的基本等价关系,150多年来,基尔霍夫定律被广泛用于测量和计算热辐射器的发射率。然而,基尔霍夫定律的有效性并不是热力学的要求,对于非互易热辐射体它就失效了。尽管非倒易热辐射体在太阳能、热整流和循环中具有巨大的优势,但对非倒易热辐射的认识还很缺乏。该项目旨在证明一个新的理论适用于所有热辐射体,包括非互易热辐射体。我们把这个理论称为广义基尔霍夫定律。通过该项目,休斯顿大学将建立一个综合研究/教育项目,为代表性不足的群体创造新的就业机会,并让少数民族和女性学生担任本科生和研究生的研究助理。PI将与休斯顿儿童博物馆合作,制作与热科学相关的教育视频。从对称性分析来看,热发射器的热发射过程可以直接与发射器伴随系统的吸收过程联系起来。因此,这个项目的目标是在这个被忽视的联系的基础上发展一个新的广义基尔霍夫定律。为此,该项目将通过数值模拟和实验测量直接证明传统基尔霍夫定律的分解。同样的程序将应用于展示新的广义基尔霍夫定律的有效性。基尔霍夫定律的有效性是否从根本上得到热力学的支持,这是一个长期存在的争论。该项目的结果将阐明这个基本问题。项目的另一个优点是建立了直接模拟非倒易热辐射的理论建模方法,为理解远场和近场非倒易热辐射传热提供了一个连贯的理论框架。最后,新的广义基尔霍夫定律将为研究非互易热辐射提供缺少的计量技术。该计划将为理解热辐射提供一个超越传统基尔霍夫定律描述的新范式,在热辐射领域开创一个新的前沿。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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Bo Zhao其他文献

Novel Biodegradable Antimicrobial Composite Scaffold by Coating Type I Collagen Scaffold with Pepsin-Degraded SIS Extraction
通过用胃蛋白酶降解的 SIS 提取物涂覆 I 型胶原支架来制备新型可生物降解抗菌复合支架
Complex Event Processing under Constrained Resources by State-Based Load Shedding
通过基于状态的减载实现资源受限下的复杂事件处理
Wireless Circuits and Systems: Healthy Radios
无线电路和系统:健康无线电
  • DOI:
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Ziyi Chang;Bo Zhao
  • 通讯作者:
    Bo Zhao
Multi-objective optimization of processing parameters for ultrasonic surface rolling 12Cr2Ni4A gear steel based on an improved gray correlation analysis
基于改进灰色关联分析的12Cr2Ni4A齿轮钢超声波滚压加工参数多目标优化
Asynchronous Detection of Erroneous Behaviors in Human-Robot Interaction with EEG: A Comparative Analysis of Machine Learning Models
利用脑电图异步检测人机交互中的错误行为:机器学习模型的比较分析
  • DOI:
    10.1101/2023.09.30.560271
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Zhezheng Ren;Xuzhe Xia;Yuzhi Tang;Bo Zhao;Chun Pang Wong;Dongsheng Xiao
  • 通讯作者:
    Dongsheng Xiao

Bo Zhao的其他文献

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{{ truncateString('Bo Zhao', 18)}}的其他基金

I-Corps: Nonreciprocal Photonic Devices for Solar Thermophotovoltaics
I-Corps:用于太阳能热光伏发电的非互易光子器件
  • 批准号:
    2344708
  • 财政年份:
    2024
  • 资助金额:
    $ 35.13万
  • 项目类别:
    Standard Grant
EAPSI: Investigating the Role of Sulfur on the Oxidation of Sulfur-Doped Hydrogenated Amorphous Carbon Films
EAPSI:研究硫对掺硫氢化非晶碳膜氧化的作用
  • 批准号:
    0813308
  • 财政年份:
    2008
  • 资助金额:
    $ 35.13万
  • 项目类别:
    Fellowship Award

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  • 批准号:
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以碳排放为导向的下一代建筑能源管理系统
  • 批准号:
    24K20901
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    Grant-in-Aid for Early-Career Scientists
Evaluating the Atmospheric Dynamics of Nitrate and Sulfate in Southern New England in Response to Emission Regulations
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  • 批准号:
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    2024
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Understanding Emission, Absorption and Energy Transfer Involving Classical and Quantum Light Interacting with Molecules
了解涉及经典光和量子光与分子相互作用的发射、吸收和能量转移
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ZEV-UP: Frugal Zero-Emission Vehicles for the Urban Passenger challenge
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MISSION: eMISsion-free HV and MV transmiSION switchgear for AC and DC
使命:用于交流和直流的无排放高压和中压输电开关设备
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