Heat pipe design optimization through the application of surface chemical treatments and the adaptation of core annular flow theory

通过应用表面化学处理和采用核心环形流动理论优化热管设计

• 批准号: 514467-2017
• 负责人: Flynn, Morris
• 金额: $ 3.49万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719352
• 关键词: Heat; pipe; design; optimization; through

The ability to transfer heat quickly and efficiently across modest distances is essential to many engineering industries e.g. aerospace, electronics and HVAC. An especially effective device for accomplishing this task is the heat pipe, which, in its simplest incarnation, consists of a closed metal tube inside of which is a working fluid that respectively evaporates and condenses where the tube is hot and cold.Working with a Canadian company committed to fabricating novel heat transfer and air handling equipment, we will use new advances in surface science and micro-fluidics to better understand heat pipe operation with a view towards improving performance through better design. In addition to generating new knowledge and training a variety of students, our major (industrial) deliverable will be a computer program capable of informing design decisions. The program in question will leverage four decades of original research in the field and will also make use of new results generated through our laboratory program. More specifically, we plan to experimentally test the feasibility of using surface chemical treatments to modify the surface energy of the wick, the component internal to the heat pipe that passively "pumps" condensed liquid back to the hot end of the heat pipe. Through such a chemical treatment, we hope to realize favourable regimes of evaporation and condensation and to separately minimize entrainment, the process by which liquid droplets are sheared away from the wick. In a related theoretical effort, we plan to adapt ideas from core annular flow theory so as to improve the dynamical description of the liquid-vapour counterflow.Results from our study will be both communicated in the scientific literature and also adapted for pragmatic application by the industrial partner. In this latter respect, we envision making a key technical contribution by improving the design capabilities and also the profitability of a Canadian company eager for new opportunities.#(cr)#(lf)This section intentionally left blank.

在适当的距离内快速有效地传递热量的能力对于许多工程行业（例如工程行业）至关重要。航空航天、电子和暖通空调。完成这项任务的一个特别有效的装置是热管，其最简单的形式是由一个封闭的金属管组成，管内装有工作流体，工作流体分别在管热和冷的地方蒸发和冷凝。公司致力于制造新型传热和空气处理设备，我们将利用表面科学和微流体学的新进展来更好地了解热管操作，以期通过更好的设计来提高性能。除了产生新知识和培训各种学生之外，我们的专业（工业）交付成果将是能够为设计决策提供信息的计算机程序。该计划将利用该领域四十年的原创研究，并将利用我们实验室计划产生的新成果。更具体地说，我们计划通过实验测试使用表面化学处理来修改吸芯表面能的可行性，吸芯是热管内部的组件，可被动地将冷凝液体“泵”回热管的热端。通过这种化学处理，我们希望实现有利的蒸发和冷凝状态，并分别最大限度地减少夹带，即液滴从吸芯上剪切下来的过程。在相关的理论工作中，我们计划采用核心环形流理论的思想，以改进液汽逆流的动力学描述。我们的研究结果将在科学文献中传达，并由产业合作伙伴。在后一方面，我们设想通过提高一家渴望新机会的加拿大公司的设计能力和盈利能力来做出关键的技术贡献。#(cr)#(lf)此部分有意留空。