Mayekawa Mfg. Co., Ltd.

Mayekawa Mfg., Ltd.

Toshio Nishio

Takayuki Kishi

Akira Matsui

Akito Machida

Keisuke Kasahara

Nobumi Ino

Yoshimitsu Sekiya

Masami Kohama

Masato Noguchi

Cryogenic liquefying/refrigerating method and system, wherein temperature of gas-to-be-liquefied at the inlet of the compressor for compressing the gas is reduced by cooling the gas discharged from the compressor using a high-efficiency chemical refrigerating machine and vapor compression refrigerating machine before the gas is introduced to a multiple stage heat exchanger thereby reducing power input to the compressor and improving liquefying/refrigerating efficiency. Gas-to-be-liquefied compressed by a compressor is cooled by aftercooler, and further cooled by an adsorption refrigerating machine which utilizes waste heat generated in the compressor and by an ammonia refrigerating machine, then the high pressure gas is introduced to a multiple-stage heat exchanger where it is cooled by low pressure low temperature gas separated from a mixture of liquid and gas generated by adiabatically expanding the high pressure gas through an expansion valveand returning to the compressor, and a portion of the high pressure gas is expanded adiabatically by expansion turbines in mid-course of flowing of the high pressure gas through the stages of the heat exchanger to be joined with the low pressure low temperature gas returning to the compressor.

Cryogenic liquefying/refrigerating method and system

A screw-compressor of which the full-load capacity can be adjusted without changing the shape, number of components and basic dimensions of the compressor, wherein the outer circumferential area of teeth above the pitch circle of the intake side end of the male rotor is eliminated stepwise to a prescribed angle of rotation to form an airflow rate reducing section and a bypass leading to the intake port is provided.

Screw compressor with adjustable full-load capacity

A screw rotor for fluid handling devices configured to reduce the area of blowholes virtually without relationship to the length of the sealing line by selecting specific profile shapes of the addendum of the female rotor and the dedendum on male rotor. Further, the screw rotor configuration eliminates semi-occluded pockets forming between the addendum of the female rotor and the dedendum of the male rotor.

Screw rotor for fluid handling devices

Growing community of inventors

Moriya, Japan

Toshio Nishio