微型渦輪發電系統設計、分析與測試研究

Design, Analysis, and Testing of a Microturbine Generator System

黃博昌(Po-Chang Huang)

指導教授 ： 蔣小偉

國立清華大學/工學院/動力機械工程學系/碩士(2009年)

摘要

由於渦輪發電系統具有啟動速度快，振動小，能量密度高等優點，現今被廣泛用於分散式發電。而目前有越來越多的交通載具皆採用電力驅動或是混合動力，且攜帶式電子產品也迅速蓬勃發展，發電系統微型化將是未來發展的趨勢。因此，為了縮小渦輪引擎體積以提升發電系統可攜性，本研究設計了微型渦輪轉子系統，包含簡支樑構型以及懸臂樑構型。根據測試結果，本研究中搭載滾珠軸承系統之簡支樑構型微型渦輪轉子系統有效改善文獻[1]之研究中系統轉速提升不易之問題。而本研究也進一步將轉子系統重新設計為懸臂樑構型，使軸承系統避開高溫區，同時為了在工作轉速區域內有效避開共振頻率，本研究亦建立模擬分析方法，進行轉子模態以及軸位移量分析，作為設計之依據。完成系統製造後，本研究使用頻譜分析儀監控系統運轉時之振動情形，藉此找出系統的共振頻率與模擬值做比對。
而在完成微型渦輪轉子系統之設計與開發後，為了提升本研究之效率，縮短渦輪發電系統之開發時程，本研究於第二部份將以現有之小型渦輪引擎為動力核心，配套發電機，進而開發混合動力車之渦輪發電系統配套技術，研究過程包含渦輪引擎之比較及選配、發電機匹配以及隔音罩設計，最後完成了渦輪引擎之改裝以及渦輪發電系統之建立，並初步測試系統性能至1000W負載。

關鍵字

渦輪機 ； 渦輪發電 ； 混合動力

並列摘要

Turbo generator systems are extensively used as distributed power generation because they have high energy density, low vibration and short start time. In addition, nowadays, there are more and more electric vehicles and hybrid electric vehicles around the world. Small portable electronic products are also developed immensely. So, in order to raise the portability of turbo generator system, this research designed the microturbine rotor system, including simple beam configuration and cantilever beam configuration. According to the test results, the rotation of the simple beam microturbine rotor system with ball bearing system performed better than that using the journal bearing system. This research further resigned the rotor system as cantilever beam configuration to prevent the bearing system closing to the hot section. A dummy generator system was designed with two ball bearing supports. The compressor and turbine were located on one side of the generator system such that they do not need bearing supports. This new design idea was modeled and analyzed to study the possibility of a best rotor design. After the system was completed, this research utilized the spectrum analyzer to monitor the oscillation of the system, finding the natural frequency to compare with the simulation results.
After the design and development of microturbine rotor system was finished, in order to reduce development time interval, this research used a ready-made small turbo engine as core power source, coupled with a suitable generator to establish a turbo generator system. The research content included choosing and refitting the turbo engine, matching a generator with the gear ratio, and designing a soundproof housing. Finally, this research has completed a turbo generator system and accomplished 1000W power generation.

並列關鍵字

turbine ； turbo generator ； hybrid power

參考文獻

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[8] SEIICHI IBARAKI, KUNIO SUMIDA, YUKIO YAMASHITA, HIROSHI OGITA, YASUAKI　JINNAI, Development of the “hybrid turbo,” an electrically assisted turbocharger, Mitsubishi Heavy Industries, LTD. Technical Review Vol.43 No.3(Sep. 2006).

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