Collaborative Research: EAGER: Energy Harvesting via Thermo-Piezoelectric Transduction

合作研究：EAGER：通过热压电转换进行能量收集

• 批准号: 1549973
• 负责人: Scott Thompson
• 金额: $ 13.49万
• 依托单位: Mississippi State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2016-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1549973&HistoricalAwards=false
• 关键词: Collaborative; Research; EAGER; Energy; Harvesting

This collaborative, EArly-concept Grants for Exploratory Research (EAGER), research project focuses on a design concept that may allow energy harvesting from waste heat, by converting the heat to electrical energy. The vision of the research is to use heat pipes, in particular so-called oscillating heat pipes (OHP). Inside an OHP, a series of serpentine-arranged mini-channels exist that are partially filled with a working fluid. There has been limited, if any, research in the area of energy-harvesting through the use of heat pipes. Heat pipes provide salient mechanical work within their structure due to vapor expansion and fluid flow. This research aims to harvest this internal work by augmenting the OHP heat transfer to the environment through utilization of a specially designed energy harvesting system that enables generation of electrical work through a piezoelectric effect, namely thermally-actuated piezoelectric transduction (TPT). This research project will contribute to better understanding of the physics and application of TPT, improved understanding of piezoelectric-materials, energy-harvesting using OHPs. This research will bridge research perspectives and approaches from the thermal/fluid sciences and power generation. Potential applications for these devices are numerous, especially for waste heat recovery and/or renewable power generation. The technology and basic science derived can result in: off-grid power generation for communications devices (e.g., third world country cellular phone charging and defense applications), more energy-efficient electronics packaging schemes, and new opportunities for high heat flux thermal energy harvesting. Geothermal temperature gradients may also be exploited for constant, renewable power generation via the implementation of ultra-large OHP/TPT systems or OHP/TPTs aligned in-series. This collaborative project will support both graduate and undergraduate researchers that have been traditionally underrepresented.The OHP has yet to be investigated as a means to destabilize natural temperature gradients for the purpose of establishing a Stirling cycle, nor has it been investigated as a means for power generation. A unique opportunity for using TPT is atop a flat-plate oscillating heat pipe (OHP) - a device that effectively transfers heat via cyclic phase change of an internal working fluid - giving rise to an oscillatory temperature field on its surface. The research will investigate the use of both TPT and OHPs for combined 1) power generation/energy harvesting, and 2) highly-efficient heat transfer. To accomplish this, a unique energy harvester, which is directly attached to the OHP surface, will be designed and will consist of a micro-sized heat sink, encapsulated gas and suspended, spring-resisted piezoelectric material. An aggressive schedule of well-designed experiments is planned to determine how the effectiveness of TPT depends on OHP and energy harvester design. A highly-coupled set of governing equations will be defined and solved by joining common OHP thermo/fluidic models with the constitutive equations of piezoelectric materials. Numerical multi-physics software will be utilized to simulate the convective air flow in the energy harvester and electricity generation inherent to the proposed method for OHP-integrated TPT. The mechanical response and fatigue of various piezoelectric materials for TPT will be evaluated. Thermoelectricity generation via the proposed OHP/TPT is a unique and potentially transformative approach to enthalpy-to-electricity conversion as the OHP/TPT can efficiently transfer heat from one location to another (with ultra-high thermal conductivity) while also generating power.

这个早期概念探索性研究资助 (EAGER) 合作研究项目的重点是一种设计概念，该设计概念可以通过将热量转化为电能，从废热中收集能量。该研究的目标是使用热管，特别是所谓的振荡热管（OHP）。 OHP 内部存在一系列蛇形排列的微型通道，其中部分填充有工作流体。通过使用热管收集能量领域的研究即使有，也很有限。由于蒸气膨胀和流体流动，热管在其结构内提供显着的机械功。本研究旨在通过利用专门设计的能量收集系统来增强 OHP 向环境的热传递，从而收集内部功，该系统能够通过压电效应（即热驱动压电传导 (TPT)）产生电功。该研究项目将有助于更好地理解 TPT 的物理和应用，加深对压电材料和使用 OHP 能量收集的理解。这项研究将连接热/流体科学和发电的研究观点和方法。这些设备的潜在应用有很多，尤其是废热回收和/或可再生能源发电。所衍生的技术和基础科学可以带来：通信设备的离网发电（例如，第三世界国家的手机充电和国防应用）、更节能的电子封装方案以及高热通量热能收集的新机会。通过实施超大型 OHP/TPT 系统或串联排列的 OHP/TPT，还可以利用地热温度梯度来实现持续的可再生发电。该合作项目将为传统上代表性不足的研究生和本科生研究人员提供支持。OHP 尚未被研究为一种破坏自然温度梯度以建立斯特林循环的手段，也尚未被研究为一种发电手段一代。使用 TPT 的一个独特机会是在平板振荡热管 (OHP) 顶部，这是一种通过内部工作流体的循环相变有效传递热量的装置，可在其表面产生振荡温度场。该研究将调查 TPT 和 OHP 的组合使用：1) 发电/能量收集，2) 高效传热。为了实现这一目标，将设计一种直接连接到 OHP 表面的独特能量收集器，该能量收集器由微型散热器、封装气体和悬浮的弹簧抵抗压电材料组成。计划积极安排精心设计的实验，以确定 TPT 的有效性如何取决于 OHP 和能量收集器设计。通过将常见的 OHP 热/流体模型与压电材料的本构方程相结合，可以定义和求解一组高度耦合的控制方程。将利用数值多物理场软件来模拟能量收集器中的对流气流以及所提出的 OHP 集成 TPT 方法所固有的发电。将评估用于 TPT 的各种压电材料的机械响应和疲劳。通过拟议的 OHP/TPT 进行热电发电是一种独特且具有潜在变革性的热函-电能转换方法，因为 OHP/TPT 可以有效地将热量从一个位置转移到另一个位置（具有超高导热率），同时还可以发电。

项目成果

A modified energy-based approach for fatigue life prediction of superelastic NiTi in presence of tensile mean strain and stress

• DOI: 10.1016/j.ijmecsci.2016.08.012
• 发表时间: 2016-10
• 期刊: International Journal of Mechanical Sciences
• 影响因子: 7.3
• 作者: M. Mahtabi;N. Shamsaei

Analysis and comparison of internal and external temperature measurements of a tubular oscillating heat pipe

管式振荡热管内外温度测量分析与比较

• DOI: 10.1016/j.expthermflusci.2017.01.020
• 发表时间: 2017
• 期刊: Experimental Thermal and Fluid Science
• 影响因子: 3.2
• 作者: Monroe, J. Gabriel;Aspin, Zachary S.;Fairley, John D.;Thompson, Scott M.
• 通讯作者: Thompson, Scott M.

Energy harvesting via fluidic agitation of a magnet within an oscillating heat pipe

通过振荡热管内磁体的流体搅拌来收集能量

• DOI: 10.1016/j.applthermaleng.2017.10.076
• 发表时间: 2018
• 期刊: Applied Thermal Engineering
• 影响因子: 6.4
• 作者: Monroe, J. Gabriel;Ibrahim, Omar T.;Thompson, Scott M.;Shamsaei, Nima
• 通讯作者: Shamsaei, Nima