Development of high efficiency scroll compressor (C1329/027)

2011 ◽  
pp. 469-475
Author(s):  
M Chikano ◽  
Y Yanagase ◽  
M Matsunaga ◽  
K Tojo
Keyword(s):  
High Efficiency ◽  
Scroll Compressor

scholarly journals High Precision and High Efficiency Machining of Scroll Compressor Components (Bottom Machining of Orbiting and Fixed Scrolls in Low Wear)

2004 ◽  
Vol 70 (695) ◽  
pp. 2126-2132
Author(s):  
Kazuya KATO ◽  
Yoshimi TAKEUCHI ◽  
Yukio MAEDA ◽  
Toshio YAMANAKA
Keyword(s):  
High Precision ◽  
High Efficiency ◽  
Scroll Compressor ◽  
Low Wear

High-precision and high-efficiency machining of scroll compressor components

2005 ◽  
Vol 27 (3-4) ◽  
pp. 260-267 ◽  
Author(s):  
Kazuya Kato ◽  
Yoshimi Takeuchi ◽  
Yukio Maeda ◽  
Toshio Yamanaka
Keyword(s):  
High Precision ◽  
High Efficiency ◽  
Scroll Compressor

A Study on Running Reliability of Scroll Compressor in Heat Pump System

2002 ◽  
Author(s):  
Yuanyang Zhao ◽  
Liansheng Li ◽  
Jiang Shen ◽  
Pengcheng Shu ◽  
Gaoxuan Pu ◽  
...  
Keyword(s):  
Heat Pump ◽  
High Efficiency ◽  
Atmospheric Condition ◽  
Refrigeration System ◽  
Scroll Compressor ◽  
Electric Voltage ◽  
Pump System ◽  
Heat Pump System ◽  
Design Concepts ◽  
Compact Size

Scroll type of compressor has been used in heat pump & refrigeration system because of its compact size, high efficiency, low vibration and noise level, and excellent running reliability. In the refrigeration cycle the scroll compressor runs smoothly and perfectly, but in the heat pump cycle some troubles appear because its working condition becomes worse. The effect of different factors such as atmospheric condition, electric voltage fluctuation, structure of scroll compressor etc. on running reliability of heat pump system are discussed in this paper. The thermodynamic and aerodynamic behaviors will be emphasized. Some basic design concepts for the running reliability of scroll compressor in the heat pump system are pointed out.

Development of a three-dimensional scroll compressor

2008 ◽  
Vol 222 (4) ◽  
pp. 193-200 ◽  
Author(s):  
H Sato ◽  
M Fujitani ◽  
H Kobayashi ◽  
H Mizuno ◽  
T Itoh
Keyword(s):  
Performance Improvement ◽  
High Efficiency ◽  
Three Dimensional ◽  
Radial Compression ◽  
Cylinder Pressure ◽  
Efficiency Improvement ◽  
Air Conditioner ◽  
Scroll Compressor ◽  
Gas Leakage ◽  
Compression Mechanism

Scroll compressor has been employed in various appliances due to its advantages such as high efficiency and low vibration. For the purpose of further performance improvement in scroll compressor, the authors have developed a new conceptual three-dimensional compression mechanism (three-dimensional scroll) by adding an axial compression to the conventional radial compression. By realizing three-dimensional compression, which has been impossible for the conventional scroll, higher efficiency, higher reliability, and smaller size are achieved. Since the three-dimensional scroll has steps in scroll tip and end plate, the key point of efficiency improvement in the three-dimensional scroll is to minimize the gas leakage in the steps. Through cylinder pressure measurements and visualization tests, characteristics of the leakage in the steps are obtained and the optimum clearance ranges are determined. Based on this, the authors have developed high efficiency, small size, and lightweight three-dimensional scroll compressor for commercial air-conditioner. The developed three-dimensional scroll compressor archived 35 per cent smaller size, 26 per cent lighter weight, and 5.5 per cent improvement of efficiency compared with the conventional one.

Development of high efficiency scroll compressor

2011 ◽  
pp. 469-475 ◽  
Author(s):  
M. Chikano ◽  
Y. Yanagase ◽  
M. Matsunaga ◽  
K. Tojo
Keyword(s):  
High Efficiency ◽  
Scroll Compressor

scholarly journals High Precision and High Efficiency Machining of the Scroll Compressor Pieces (High Efficient Bottom Machining in Consideration of Surface Roughness)

2004 ◽  
Vol 70 (697) ◽  
pp. 2730-2736
Author(s):  
Kazuya KATO ◽  
Yoshimi TAKEUCHI ◽  
Yukio MAEDA ◽  
Toshio YAMANAKA ◽  
Hideaki ONOZUKA
Keyword(s):  
Surface Roughness ◽  
High Precision ◽  
High Efficiency ◽  
Scroll Compressor ◽  
High Efficient

scholarly journals High Precision and High Efficiency Machining of the Scroll Compressor Pieces (Improvement of Machining Accuracy in Constant Cutting Point Control)

2005 ◽  
Vol 71 (701) ◽  
pp. 304-310
Author(s):  
Kazuya KATO ◽  
Yoshimi TAKEUCHI ◽  
Yukio MAEDA ◽  
Toshio YAMANAKA ◽  
Hideaki ONOZUKA
Keyword(s):  
High Precision ◽  
High Efficiency ◽  
Machining Accuracy ◽  
Scroll Compressor ◽  
Point Control ◽  
Cutting Point

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

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