Shin Sekiya

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In this study, a scroll expander was developed to recover the throttling loss in CO2 cycles. In cycles with an intercooler, the expander drives directly the second-stage compressor using the energy recovered from the expansion process. To carry out this function, a back-to-back scroll mechanism was applied to the expansion and subcompression processes. A(More)
Increased demand of energy saving, more-high efficiency compressor is required. For high-efficiency of scroll compressor, we must minimize leak-loss on the tip and thrust-mechanical loss of the Orbiting-Scroll’s thrust face. New-type scroll compressor has new parts “Compliant-Frame” that is compliant axially, in the back of the Orbiting-Scroll, and has two(More)
The reduction of greenhouse gas emissions has been the focus of global attention. As an alternative refrigerant to HFC, CO2 has been considered. As another promising possibility of energy conservation, use of heat pump systems has also been spreading. However, conventional heat pump systems have problems remaining, such as inadequate heating capacity or(More)
Despite the importance of preoperative evaluation of small vessels in flap elevation, the conventional methods such as palpation or Doppler probes are technically insufficient. These two methods do not detect varying venous patterns that would be identified during the operation in a "trial-and-error" manner. In order to overcome this problem in the facial(More)
In the reconstruction of asymmetrical deformities of the facial skeleton, both an endoscope and a neuronavigator have been used. The endoscope allows the surgeon a wide view of the object on a television monitor, reduces the scarring, minimizes the undermined field, and reduces the need to work blind. The neuronavigator is a frameless computed tomographic(More)
The conditions, required for applying POE to refrigerating oil of rotary compressor using HFCs, were examined. It became clear that the vanes and pistons are more likely to scuff when the water content is high, however, the scuffing pressure of the sliding bearings is less likely to be affected by the water content. The use of POE with optimized extreme(More)
1. Disopyramide induced a concentration-dependent decrease in action potential amplitude and Vmax, and prolonged action potential durations (APD50 and APD90) in ventricular muscle. 2. Na+-loaded membrane vesicles isolated from canine ventricular muscle rapidly accumulated Ca2+. 3. Monensin (10(-5) M) abolished Na+-dependent Ca2+ uptake, and Na+ enhanced(More)
Low global warming potential refrigerants such as HFO (hydro fluoro olefin)-1234yf are attractive as alternative working fluids in airconditioning and cooling systems to address global warming. However, larger compressor sizes were required due to the lower fluid density compared with conventional refrigerants such as R410A. Thus, a new wing-vane compressor(More)
Low global warming potential refrigerants such as HFO (hydro fluoro olefin) -1234yf are attractive as alternative working fluids in air-conditioning and cooling systems to address global warming. However, larger compressor sizes were required due to the lower fluid density compared with conventional refrigerants such as R410A. Thus, a new wing-vane(More)
Alkylbenzenes (AB), which are barely miscible with HFC refrigerants, are chemically stable and show better anti-wear properties than polyolesters (POE). The objective of this study is to examine the possibility of ABs with R410A used in residential split air conditioners. For R410NAB, R22/mineral oil (MO) and R410A/POE, the wear at sliding parts (vane and(More)