Effects of the driving voltage waveform on the performance of the Stirling-type pulse tube cryocooler driven by the moving-coil linear compressor. (March 2017)

• Record Type: Journal Article
• Authors: Tan, Jun; Dang, Haizheng
• Is Part Of: International journal of refrigeration. Volume 75(2017)
• Page Start: 239
• Page End: 249
• Publication Date: 2017-03
• Subjects: Driving voltage waveform -- Moving-coil linear compressor -- Stirling-type pulse tube cryocooler -- Compressor motor efficiency -- Cooling performance; Forme d'onde de la tension de commande -- Compresseur linéaire à serpentin mobile -- Cryorefroidisseur à tube à pulsation de type Stirling -- Rendement du moteur de compresseur -- Performance de refroidissement; Refrigeration and refrigerating machinery -- Periodicals; 621.56
• DOI: 10.1016/j.ijrefrig.2016.12.017
• Languages: English
• ISSNs: 0140-7007

Abstract

Highlights: Effects of voltage waveforms on both compressor and SPTC performances are studied. Sine, trapezoid and SWCTH waveforms are analyzed, tested and compared. SPTC efficiencies under SWCTH and sine are highest and lowest, respectively. Motor efficiencies under both SWCTH and trapezoid waveforms exceed 90%. An approach to achieve the very high efficiency linear compressor is suggested. Abstract: The effects of three typical waveforms, namely, sine, trapezoid and smeared sine, on the performance of the Stirling-type pulse tube cryocooler (SPTC) driven by the moving-coil linear compressor are analyzed and studied experimentally. The results indicate that the dynamic pressure at the inlet of the cold finger has a weak relation with the driving voltage waveform, but the latter plays an important role in affecting both the motor efficiency and the SPTC cooling performance. In the tested range, either the cooling efficiency or the motor efficiency under the smeared sine waveform is the highest, while that under the sine waveform is the lowest. Moreover, given that the input power is below 30 W, the motor efficiencies under both smeared sine and trapezoid waveforms exceed 90%, which suggests a promising approach to achieve a linear compressor with a very high motor efficiency by optimizing the voltage waveform.