Makoto Fujitani

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This paper presents the theoretical and experimental study on the discharge pressure, including high frequency pressure pulsations. FLIC method, which is one of the numerical fluid analysis methods, was applied to evaluation of the scroll discharge pressure. Each of finite element cells changed the mesh shape and the area size as moving the orbiting scroll.(More)
This paper presents how much experimental errors are caused by the characteristics of pressure transducers in P-V measurements. In addition, the accuracy of the balanced pressure valve (the B.P.V.) of a free disc type, which determines the cylinder absolute pressure level, is shown. Namely, the indicated gas work was calculated by the following two methods:(More)
In order to respond to the increase of customer’s demands for economical efficiency and environmental protection, we have developed a new scroll compressor using HFC-410A (R410A) for commercial gas heat pump (GHP) which is known for its energy saving and comfort. The new scroll compressor requires high efficiency as stated above. In addition, the operating(More)
This paper presents the development of the low cost liquid pump. The rotary compressor developed as the gas compressor for the residential air-conditioner was converted into the liquid refrigerant pump. Problems of the liquid refrigerant pump are the reliability assessment of sliding parts and the reduction of the noise generated by discharge pulsation in(More)
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