Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

Tetsuya Kakiuchi

Shigeto Adachi

Yutaka Narukawa

Koichiro Hashimoto

Kazumasa Nishimura

Haruyuki Matsuda

Kazunori Fukuhara

Noboru Tsuboi

Koji Noishiki

Kenji Nagura

Akitoshi Fujisawa

Takashi Okuno

Shinichi Miura

Yasushi Amano

A gas supply system () includes a compressor unit (), an accumulator unit (), a pre-cooling system () and a housing (). In the gas supply system (), the compressor unit () is vertically arranged and the pre-cooling system () is arranged above the accumulator unit () in the housing (). The compressor unit () and the accumulator unit () are covered by one rectangular parallelepiped housing ().

Gas supply system and hydrogen station

A gas supply system&#x2014;includes a compressor unit, an accumulator unit, a pre-cooling system and a housing. In the gas supply system, the compressor unit is vertically arranged and the pre-cooling system is arranged above the accumulator unit in the housing. The compressor unit and the accumulator unit are covered by one rectangular parallelepiped housing.

A compression device is equipped with a compressor () and a heat energy recovery unit () that recovers heat energy from a compressed gas. The heat energy recovery unit () is equipped with: a heat exchanger () that has an inflow port (), and that heats an operating medium by means of the heat from the compressed gas; an expansion device (); a power recovery unit (); a condenser (); and a pump (). The heat exchanger () is arranged closer to the compressor () than the expansion device (), and is oriented such that the inflow port () faces the compressor ().

Compression device

A compressing device of the present invention comprises a compressor, a heat exchanger, an expander, a power recovery unit, a condenser, a pump, a bypass flow passage for bypassing the expander, and a bypass valve. When a bypass condition for allowing a working medium to circulate through the bypass flow passage is satisfied, the bypass valve is caused to be opened, thereby allowing the working medium to circulate between the heat exchanger and the condenser through the bypass flow passage. As a result, a compressed gas discharged from the compressor is cooled by the working medium in the heat exchanger. This configuration makes it possible to cool the compressed gas by the working medium in the heat exchanger regardless of operation conditions of the expander.

Compressing device

A heat energy recovery device, which recovers heat energy of a heat medium by utilizing a Rankine cycle of a working medium, comprises a first heater, a second heater, an expander, an oil separation unit, a condenser, a working medium pump, and an oil-leading passage. When the height of a liquid level in the oil separation unitis less than a lower limit value, a control unitfirst performs a speed reduction control of the working medium pumpto reduce an inflow rate of a working medium into the second heater, and after a fixed period of time, performs an opening control for opening an on-off unit. By the opening of the on-off valve, oil Lin the second heateris led out to the oil separation unitthrough the oil-leading passage

Flow rate control of heat energy recovery device including oil separator

An energy recovery device includes a plurality of heat exchangers connected in parallel with each other into which a plurality of heat sources flow, an expander for expanding a working medium, a dynamic power recovery unit, a condenser, a pump for sending the working medium which has flown out from the condenser to the plurality of heat exchangers, and a regulator for regulating inflow rates of the working medium flowing into the plurality of heat exchangers. The regulator regulates the inflow rates of the liquid phase working medium flowing into the plurality of respective heat exchangers such that a difference of temperatures or a difference of degrees of superheat of the gas phase working medium which has flown out from the plurality of respective heat exchangers falls within a certain range. Thereby, heat energy can be efficiently recovered from the plurality of heat sources having temperatures different from each other.

Energy recovery device and compression device, and energy recovery method

In a screw compression apparatus in which shaft sealing members () isolate a bearing space () from a rotor chamber () and a lubricating fluid separating collector () separates the rotor lubricating fluid from the target gas discharged by the screw compressor (), rotor lubricating fluid separated by the lubricating fluid separating collector () is introduced into the rotor chamber () via a rotor lubricating flow channel (), and a bearing lubricating system () supplies a bearing lubricating fluid to the bearing space (). The bearing lubricating fluid flowing out from the bearing space () is cooled and returned to the bearing space (). A part of the target gas may be supplied to the shaft sealing members () at a location between carbon rings of the shaft sealing members.

Growing community of inventors

Takasago, Japan

Tetsuya Kakiuchi