Modeling, design, and development of novel thermagoustic and therporaoustic systems

新型热声和热疗系统的建模、设计和开发

• 批准号: 402113-2011
• 负责人: Mahmud, Shohel
• 金额: $ 1.82万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573163
• 关键词: Modeling; design; development; novel; thermagoustic

Imagine a refrigerator that uses environmentally friendly gases instead of the current environmentally damaging CFCs (chlorofluorocarbons) and HFCs (hydrofluorocarbons). Imagine this refrigerator being so quiet that it cannot be heard. Further imagine that the costly compressor is replaced with a single moving part that makes the refrigerator inherently robust and reliable. Such a refrigerator exists and it utilizes thermoacoustics. A typical thermoacoustic engine utilizes a low grade heat source (e.g., waste heat and solar energy) and converts it to acoustic power. In contrast, a typical thermoacoustic refrigerator utilizes an acoustic source to produce a cooling effect. The catch is that thermoacoustic systems are currently inefficient, thus they have only found in niche applications such as in space or in environment friendly promotions by Ben and Jerry's Ice Cream. This research work proposes two novel branches of thermoacoustics, namely, thermagoustics (thermal-magnetic-acoustics) and therporaoustics (thermal-porous-acoustics) which represent major steps forward in the pursuit of more efficient thermoacoustic devices. In thermagoustics magnetic force controls thermoacoustic operation while in therporaoustics the acoustic sound waves travel through a porous medium to enhance thermoacoustic efficiencies. Thermagoustic and therporaoustic devices exhibit their potential application in several areas: electronic cooling (e.g., high frequency piezoelectric cooler), low-temperature applications (e.g., Stirling cryo-cooler), remote space applications (e.g., NASA's space shuttle), cryogenic applications (e.g., Thermoacoustic-Stirling system), refrigeration (e.g., solar powered thermoacoustic refrigerator), and hybrid systems (e.g., thermoelectric-thermoacoustic cooling systems) for vehicle applications. The outcomes of this research will lead to more efficient thermoacoustic device designs, thus aiding commercialization. Given the infancy of thermoacoustics and the potential consumer market, Canada has the potential to be a leader in the commercialization of this technology, especially if major efficiency breakthroughs are developed within Canada.

想象一下，一台冰箱使用环保气体，而不是目前破坏环境的 CFC（氯氟碳化合物）和 HFC（氢氟碳化合物）。想象一下这台冰箱安静得听不到声音。进一步想象一下，昂贵的压缩机被替换为单个移动部件，从而使冰箱本身坚固可靠。这种冰箱是存在的并且它利用热声学。典型的热声发动机利用低品位热源（例如废热和太阳能）并将其转换为声能。相比之下，典型的热声冰箱利用声源来产生冷却效果。问题是热声系统目前效率低下，因此它们只出现在一些小众应用中，例如太空或本杰瑞冰淇淋的环保促销活动。 这项研究工作提出了热声学的两个新分支，即热声学（热磁声学）和热声学（热多孔声学），它们代表了追求更高效热声器件的重大进步。在热声学中，磁力控制热声操作，而在热声学中，声学声波穿过多孔介质以提高热声效率。热声和热声装置在多个领域展示了其潜在应用：电子冷却（例如，高频压电冷却器）、低温应用（例如，斯特林低温冷却器）、远程空间应用（例如，NASA 的航天飞机）、低温应用（例如，热声-斯特林系统）、制冷（例如，太阳能供电） 热声制冷机）和用于车辆应用的混合系统（例如热电-热声冷却系统）。 这项研究的成果将带来更高效的热声设备设计，从而有助于商业化。鉴于热声学的起步阶段和潜在的消费市场，加拿大有潜力成为该技术商业化的领导者，特别是如果加拿大境内实现了重大的效率突破。