Performance Prediction and Parametric Analysis of a Traveling-wave Thermo-Acoustic Generator for the Space Applications

要想將熱聲發電機應用于空間小型衛星供電或其他空間供能任務中，其尺寸需要限制在一定的範圍內。本文就一種行波熱聲發電機進行空間應用性能預測及參數分析研究，期望偉熱聲發電機的空間應用優化設計提供一些參考。建立了其理想的熱力學效率計算模型及諧振腔幾何參數計算模型，分析了熱端換熱器溫度、工作頻率、氣體工質選擇等對熱聲發電機的熱聲、熱電轉換效率及諧振管長度等方面的影響，并列出了相應的變參數分析結果。分析結果表明提高系統熱端換熱器的溫度能夠提高系統熱電轉換效率，但同時增大了所需諧振管長度；選用具有較重分子量的氣體工質，如無污染製冷劑CF_3I等，或提高系統的工作頻率能夠極大的減小所需諧振管的尺寸，進而減小整個熱聲發電系統的尺寸。

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並列摘要

Generators driven by thermo-acoustic engines (TAEs) can be applied to the power supplying for small satellites or any other space missions as long as the TAEs can be optimized into an acceptable size. In this paper, performance prediction and parametric analysis of a traveling-wave thermo-acoustic generator (TWTG) has been studied to facilitate optimum design of TWTGs for space application. Mathematical models of the TWTG were established, and based on which some research have been carried out. The research indicates how the parameters (for example, the hot heat-exchanger temperature, fundamental frequency and working medium) effect on the performances of the TWTG including the efficiencies of the thermo-acoustic conversion and the thermo-electric conversion and the least dimension of the resonator. The results demonstrate that: firstly, a higher hot heat exchanger temperature leads to higher thermo-electric conversion efficiency, meanwhile a longer resonator is required; secondly, heavy gases (environment-friendly refrigerant CF_3I, for instance) and high operating frequency can make great contribution to reducing the resonator's size, thereby making the TWTG smaller.

並列關鍵字

Traveling-wave thermo-acoustic generator ； Thermo-electric conversion efficiency ； Resonator ； CF_3I

國際替代計量

Performance Prediction and Parametric Analysis of a Traveling-wave Thermo-Acoustic Generator for the Space Applications

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