对五种聚甲基丙烯酸甲酯封闭型压电致动器作为冷却风扇的研究。

Investigations on Five PMMA Closed Types of Piezo Actuators as a Cooling Fan.

作者信息

Wang Rong-Tsu, Wang Jung-Chang

机构信息

Department and Graduate Institute of Information Management, Yu Da University of Science and Technology, Miaoli County 36143, Taiwan.

Department of Marine Engineering (DME), National Taiwan Ocean University (NTOU), Keelung 202301, Taiwan.

出版信息

Polymers (Basel). 2023 Jan 10;15(2):377. doi: 10.3390/polym15020377.

DOI:10.3390/polym15020377

PMID:36679257

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9866391/

Abstract

There are five closed types of piezo actuators (closed type of PA, closed PA) as a cooling fan relative to those different PAJs of the previous work (open type of PAJ, open PAJ) for analysis in the present study. Closed PA was composed of circular piezoelectric ceramics (PCs) and acrylic (PMMA) plates and investigated on five different types at operating conditions. The results show that the noise of the closed PA is quieter than that of the open PAJ by about 10 dB. When the closed PA is deposed at a suitable distance of 10 to 20 mm from the heat source, averting sucking back the high-temperature fluids around that, the thermal convection coefficient is above 120% more than that of the conventional rotary fan. The cooling performances of these five closed PAs were evaluated by thermal analysis technique, and the convection thermal resistance of the best closed PA can be decreased by over 15%. In terms of energy consumption, a monolithic closed PA was less than 10% than that of a rotary fan. Among these five closed PAs, the best one has the essential qualities that the diameter of the piezoelectric sheet is 41 mm, the opening length is 4 mm, and the outer opening length is 10 mm. Moreover, the best operating conditions are a voltage frequency of 300 Hz and a release distance of 15 mm in the present study.

摘要

相对于先前工作中使用的不同类型的开放式压电致动器连接接头（open type of PAJ，开放式PAJ），本研究中有五种封闭式压电致动器（closed type of PA，封闭式PA）作为冷却风扇进行分析。封闭式PA由圆形压电陶瓷（PC）和丙烯酸（PMMA）板组成，并在五种不同类型的工作条件下进行了研究。结果表明，封闭式PA的噪声比开放式PAJ低约10 dB。当封闭式PA放置在距离热源10至20 mm的合适距离处，避免吸回周围的高温流体时，其热对流系数比传统旋转风扇高出120%以上。通过热分析技术评估了这五种封闭式PA的冷却性能，最佳封闭式PA的对流热阻可降低超过15%。在能耗方面，单片式封闭式PA比旋转风扇低不到10%。在这五种封闭式PA中，最佳的一种具有压电片直径为41 mm、开口长度为4 mm、外部开口长度为10 mm的基本特性。此外，在本研究中，最佳工作条件是电压频率为300 Hz，释放距离为15 mm。