GOALI: Exploiting Charge Separation in Ice for Electrostatic De-Icing

目标：利用冰中的电荷分离进行静电除冰

• 批准号: 2034242
• 负责人: Jonathan Boreyko
• 金额: $ 53.3万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-12-01 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2034242&HistoricalAwards=false
• 关键词: GOALI; Exploiting; Charge; Separation; Ice

The accumulation of ice and frost on infrastructure and vehicles results in billions of dollars in economic losses annually in the United States. The use of heat and antifreeze chemicals to remove ice is costly and harmful to the environment, and mechanical de-icing is often impractical and can damage underlying surfaces. This GOALI project will develop a completely novel approach to de-icing that exploits the fact that ice can become spontaneously electrified. A combination of experimental measurements and numerical simulations will characterize the extent to which ice and frost can become electrified under various conditions. By placing charged electrodes over the ice, it can be forced to rapidly detach from an underlying surface by virtue of the resulting electrostatic force. This new technique of electrostatic de-icing will be examined for three different kinds of ice: planar ice sheets, dendritic frost sheets, and rime ice. The research team will collaborate with Rolls-Royce in applying electrostatic de-icing to aircraft to protect jet engines from harmful ice ingestion. The researchers will also create an exhibit for the Science Museum of Western Virginia that connects the concept of electrostatic de-icing to the electrification of clouds.There are two primary objectives to the project: gaining a comprehensive understanding of charge separation in ice and exploiting the effect to enable electrostatic de-icing. It is already known that the primary mechanism for charge separation in ice is the presence of a temperature differential, which causes the preferential migration of certain (naturally occurring) ionic defects over others. However, existing models of charge separation in ice apply only at steady-state, rely on several untested assumptions, lack controlled experimental or numerical validation, and are narrowly focused on the specific context of the electrification of clouds. In contrast, the project will utilize sophisticated numerical techniques in conjunction with advanced experimental characterization. The temperature gradient, environmental conditions, and geometric structure of the ice/frost will be widely varied to determine their effect on the extent of charge separation. Second, these findings will be exploited by maximizing the extent of charge separation in ice and applying an opposing charge to rapidly detach and remove the ice from its surface. This new de-icing construct, termed electrostatic de-icing, is unprecedented. In addition to enabling a practical and novel de-icing construct, the insights gained regarding charge separation in ice will lead to a better understanding of the electrification of clouds.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.

在美国，冰和霜冻在基础设施和车辆上的积累导致数十亿美元的经济损失。 使用热和防冻剂去除冰的使用对环境是昂贵且有害的，机械排放通常是不切实际的，并且会损坏底层的底面。 这个守门员项目将开发一种完全新颖的方法来进行冰水，以利用冰可以自发电气化的事实。 实验测量和数值模拟的组合将表征冰和霜在各种条件下都能发电的程度。 通过将带电的电极放在冰上，可以通过产生的静电力迅速从下面的表面脱离。 这种静电去冰的新技术将进行三种不同种类的冰：平面冰盖，树突状霜冻和rime冰。 研究团队将与劳斯莱斯合作，将静电除冰到飞机施加静电，以保护喷气发动机免受有害摄入量。 研究人员还将为西弗吉尼亚州科学博物馆创建一个展览，该展览将静电启动的概念与云的电气化联系起来。该项目有两个主要目标：对冰中的电荷分离有全面的理解，并利用效果以启用静电性去冰。 众所周知，冰中电荷分离的主要机制是存在温度差异，这导致某些（天然发生的）离子缺陷的优先​​迁移比其他离子缺陷。 但是，现有的冰中电荷分离模型仅适用于稳态，依靠几个未经测试的假设，缺乏受控的实验或数值验证，并且狭义地专注于云电气化的特定背景。相反，该项目将与先进的实验表征一起利用复杂的数值技术。 冰/霜的温度梯度，环境条件和几何结构将广泛变化，以确定它们对电荷分离程度的影响。 其次，这些发现将通过最大化冰中的电荷分离程度，并应用相反的电荷以快速脱离并从其表面取出冰，从而利用这些发现。这种称为静电去冰的新的去冰结构是前所未有的。 除了实现实用和新颖的启动构造之外，关于冰的电荷分离获得的见解还将使人们更好地理解云的电气化。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响标准通过评估来获得支持的。

项目成果

Thermoelectrics in ice slabs: charge dynamics and thermovoltages

冰板中的热电：电荷动力学和热电压

• DOI: 10.1039/d1cp02304g
• 发表时间: 2021
• 期刊: Physical Chemistry Chemical Physics
• 影响因子: 3.3
• 作者: Zhang, Hongwei;De Poorter, John;Mukherjee, Ranit;Boreyko, Jonathan B.;Qiao, Rui
• 通讯作者: Qiao, Rui

Electrostatic Jumping of Frost

• DOI: 10.1021/acsnano.0c09153
• 发表时间: 2021-02-24
• 期刊: ACS NANO
• 影响因子: 17.1
• 作者: Mukherjee, Ranit;Ahmadi, S. Farzad;Boreyko, Jonathan B.
• 通讯作者: Boreyko, Jonathan B.