An experimental study of the dynamic equivalence leakage of rolling-piston compressors

In this article, a new two-stage rolling piston CO2 compressor was developed. A test rig was designed to measure the performance of this compressor. Based on the measured p–V indicator diagram, the distributions of indicated power and compressor performance under various operating conditions have been analysed in detail. It is shown that the discharge passage loss of the first stage and the suction passage loss of the second stage are much higher than other losses for the tested compressor. The overall efficiency of the tested compressor decreases by 1.2 per cent with the decrease of the discharge pressure at the same suction conditions. It is also found that the superheating at the compressor inlet has very small (0.3 per cent) effect on the compressor performance.

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Experimental study on two-stage compression refrigeration/heat pump system with dual-cylinder rolling piston compressor

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2013.09.035 ◽

2014 ◽

Vol 62 (2) ◽

pp. 803-808 ◽

Cited By ~ 23

Author(s):

Xu Shuxue ◽

Ma Guoyuan

Keyword(s):

Experimental Study ◽

Heat Pump ◽

Piston Compressor ◽

Two Stage ◽

Pump System ◽

Heat Pump System ◽

Rolling Piston

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The high mechanical efficiency of rolling-piston rotary compressors (1st report, Experimental study).

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.54.2578 ◽

1988 ◽

Vol 54 (507) ◽

pp. 2578-2582

Author(s):

Noriaki ISHII ◽

Michio YAMAMURA ◽

Shigeru MURAMATSU ◽

Masafumi FUKUSHIMA ◽

Kiyoshi SANO ◽

...

Keyword(s):

Experimental Study ◽

Mechanical Efficiency ◽

Rolling Piston

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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