數值模擬分析可變基圓半徑圓漸開線渦卷式壓縮機的熱流特性

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College of Mechanical and Electrical Engineering > Master's Program, Department of Air-conditioning and Refrigeration Engineering
Engineering > Municipal Engineering & Environment Engineering
Engineering > Electrical Engineering

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數值模擬分析可變基圓半徑圓漸開線渦卷式壓縮機的熱流特性

Numerical Study on the Thermal-Fluid Fields inside the Scroll Compressor with Involute of Variable-Radii Circle

曾心澤 , Masters　　Advisor：黃博全　　

繁體中文

可變基圓半徑圓漸開線；渦卷式壓縮機；計算流體力學；容積效率； Involute of Variable-Radii Circle ； Scroll Compressor ； Computational Fluid Dynamics

Abstract │ Reference (23) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

The scroll compressor is popular in the industry of refrigeration and air-conditioning , because it is high efficiency, low noise and high reliability. Due to the limitation of the scroll compressor displacement, the scroll compressor is used in the small situation of the refrigeration and air-conditioning,. In order to match wider loading conditions, save energy and reduce carbon, this study replaces an involute of constant-radii circle with an involute of variable-radii circle to design the scroll compressor with larger displacement without changing the diameter of a base plate, wrap height and the number of turns. The research method is based on the commercial scroll compressor to design a scroll compressor with an involute of variable-radii circle. A numerical investigation is applied to explore the characteristic of the thermal-fluid fields inside in compression chamber with the difference design parameters.

The simulation results show that: (1) The rate of change of rotation angle internal pressure inside for the involute profile of variable-radii circle is smaller than that for the involute profile of constant-radii circle (2) Under the wrap height and the number of turns as the increment δ0 increases, the displacement of scroll compressor with involute of variable-radii circle becomes larger. Conversely displacement reduce; (3) Compared to the scroll compressor with involute of constant-radii circle, when δ0=-0.035, the displacement increases 31.24% ,the enthalpy difference between inlet and outlet decreases 8.8%, the volumetric efficiency and compressor efficiency increases, for the case with involute of variable-radii circle; (4) The amount of leakage, caused by the pressure difference between two adjacent compression chamber, have a significantly reduce, for the case with variable-radii circle than for that with fixed-radii circle; (5) It is found that a greater modified angle β between the outer and inner involute curve results in a earlier exhaust process the time of the exhaust is advanced for the upper chamber of the third compression.

Reference ( 23 ) 〈TOP〉

[7]Lee, Y.R., and Wu, W.F., “A Study of Planar Orbiting Mechanism and Its Applications to Scroll Fluid Machinery”, Mechanism and Machine Theory, vol. 31, pp.705–716, 1996.
連結：
[10]Liu, Y., Hung, C. and Chang, Y. “Study on Involute of Circle with Variable Radii in a Scroll Compressor”, Mechanism and Machine Theory, vol. 45, pp. 1520-1536, 2010.
連結：
[12]Lee, Y. R and Wu, W. F. “On the Profile Design of a Scroll Compressor”, International Journal of refrigeration, vol.18, pp. 308-317, 1995.
連結：
[13]賴慶峰，“R-410化對渦卷式壓縮機重要元件應力變化影響之個案討論”，中國冷凍空調雜誌，pp. 90-94，1998。
連結：
[16]Ooi, K. T. and Zhu, J. “Convective Heat Transfer in a Scroll Compressor Chamber: a 2-D Simulation”, International Journal of Thermal Science, vol. 43, pp. 677-688, 2004.
連結：

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