Matsushita Electric Industrial Co., Ltd.

Kabushiki Kaisha Toshiba

Seiji Fujiwara

Kaoru Ishida

Toru Matsuura

Toshimitsu Matsuyoshi

Makoto Sakakura

Kunihiro Ukai

Kiyoshi Taguchi

Masayuki Miyaji

Hisao Watanabe

Hiroyuki Yamauchi

Hidenobu Wakita

Takeshi Tomizawa

Masahiko Yamada

Tsuneji Kameda

Masafumi Komai

Shigeo Kasai

Hisashi Adachi

Yasuo Takagi

Kazuya Yamada

Masato Yoshino

Norihisa Saito

Fumihisa Kano

Takatoshi Asada

Hisao Oomura

Ryoji Yoshimura

Yumiko Tsuchiya

Shinichi Makino

A hydrogen production system includes: a steam generator heating supplied raw water and generating steam; an electrolytic cell receiving the steam and generating hydrogen and oxygen through a high temperature electrolysis; a cooling unit cooling an unreacted part of the steam in the high temperature electrolysis and changing the unreacted part of the steam into steam condensate; a gas/liquid separator performing gas/liquid separation on the generated hydrogen and the generated steam condensate; a hydrogen compression unit compressing the separated hydrogen and transmitting thermal energy generated when the hydrogen is compressed, to the raw water; and a hydrogen storage unit storing the compressed hydrogen.

Hydrogen production system and method for producing hydrogen

A hydrogen production system that achieves a highly-efficient hydrogen production operation even when a time-varying electric power source is used is provided. A hydrogen production system includes a capacitor inputting electric power energy from a renewable power supply, and storing electric power, a pulse voltage generation unit generating a pulse voltage having a set amplitude and a set cyclic period by using the electric power stored in the capacitor, and an electrolytic cell applying the generated pulse voltage, and generating hydrogen by high temperature steam electrolysis by using steam supplied into the electrolytic cell.

A hydrogen production system that achieves highly-efficient hydrogen production even when hydrogen is produced by using the plurality of cell stacks is provided. A hydrogen production system includes a plurality of cell stacks provided within a reaction containment, the cell stacks generating hydrogen by high temperature steam electrolysis by supplying steam to the plurality of cell stacks, a first flow path guiding the steam to each of the cell stacks, a second flow path causing a carrier gas containing air as a main component to flow into the reaction containment, and a flow regulation device provided at an inlet of the steam in each of the cell stacks, the flow regulation device regulating a flow rate of the steam caused to flow into each of the cell stacks to be uniform.

A hydrogen manufacturing apparatus for manufacturing hydrogen by utilizing heat generated in a nuclear plant. The apparatus has a heat exchanger or steam reformer to be brought into contact with cooling water containing tritium produced from the nuclear plant and a tritium permeation suppressing ceramic coating at least either the outer surface or the inner surface of the heat exchanger or steam reformer for suppressing permeation of tritium. Instead of coating with a tritium permeation suppressing ceramic, a structure prepared by combining at least two types of materials having different crystal structures may be used.

Device and method for producing hydrogen

It was difficult to acquire a good CO cleanup efficiency in a hydrogen refining apparatus, for instance, when the start-up and stop operations are frequently repeated. A hydrogen refining apparatus, including a shifter having a shifting catalyst body containing noble metals and metal oxides, and a reforming section for supplying hydrogen gas containing carbon monoxide to the shifter, (1) the temperature of an upstream side of the shifting catalyst body relative to the hydrogen gas flow being substantially between 300&#xb0; C. and 500&#xb0; C. and (2) the temperature of a downstream side of the shifting catalyst body relative to the hydrogen gas flow being substantially at 300&#xb0; C. or less.

Hydrogen refining apparatus

Conventional hydrogen purification apparatuses cannot be used satisfactorily for applications in which much time is required for startup of the apparatus, and the apparatus is repeatedly started and stopped at frequent intervals because of complicated handling. In a hydrogen purification apparatus comprising at least a catalysis body removing carbon monoxide from a reformed gas containing hydrogen, carbon monoxide and steam, the catalyst body is constituted by a carrier comprised of a complex oxide in which at least one of Mo, W and Re is compounded with Zr, or comprised of an oxide of one of Mo, W, Re and Zr, and at least one of Pt, Pd, Rh and Ru carried on the surface of the carrier.

Hydrogen purification apparatus and method and fuel cell power generation system and method

A hydrogen generator including a raw material supplying unit supplying a raw material containing a sulfur component and composed of an organic compound, a water supplying unit supplying water, a reformer producing hydrogen gas, the reformer provided with a reforming catalyst to make the raw material and water undergo a reaction, and a carbon monoxide removing unit reducing the content of carbon monoxide in hydrogen gas produced in the reformer, wherein the reforming catalyst is constituted by a carrier composed of platinum and a metal oxide is provided.

Hydrogen generator, fuel cell system and control method of hydrogen generator

An amplitude frequency characteristic adjustment circuitis provided downstream of and connected to a distortion generation circuit. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by the amplitude frequency characteristic adjustment circuit, and then their amplitudes and phases are adjusted by a vector adjustment circuit. This configuration makes it possible to suppress simultaneously both of low-frequency-side and high-frequency-side distortion voltages of a distortion generated by a wide-band class-AB power amplifier even if they are different in amplitude and phase.

Predistortion circuit, low-distortion power amplifier, and control methods therefor

A predistortion linearizer has signal dividing circuit dividing an input signal into two signals; signal adjusting circuit using one of the divided signals to execute predetermined adjustment and outputting a signal based on the adjustment; distortion signal generating circuit generating a distortion signal using the signal output from the signal adjusting circuit; signal synthesizing circuit synthesizing the other of the divided signals with the generated distortion signal; and signal amplifying circuit amplifying the synthesized signal and outputting an output signal, and wherein the signal adjusting circuit executes the predetermined adjustment such that there is a predetermined relationship between the level of a difference between the signal amplitudes of predetermined frequency components contained in a distortion signal and the level of a difference between the signal amplitudes of the predetermined frequency components contained in a distortion signal.

Predistortion linearizer and predistortion distortion compensation method, program, and medium

A power amplifier capable of compensating for distortion by pre-distortion and achieving a large distortion suppressing effect even if IM3L components and IM3U components occurring at the power amplifier have a large level difference. A power amplifying circuitamplifies an original signal. An envelope detectorgenerates an envelope signal having components identical to envelope components included in the original signal. Based on the original signal a distortion signal generating circuitgenerates a distortion signal for canceling distortion components occurring while the original signal is amplified by the power amplifying circuit. In a power combiner, the envelope signal is injected to the original signal, thereby eliminating the asymmetric characteristic of the distortion components. In the power amplifying circuit, the distortion signal is injected to the original signal, thereby suppressing the distortion components.

Power amplifier

The conventional feedforward amplifier is unable to suppress distortion components efficiently. The present invention provides a feedforward amplifier wherein the vector adjustor is adjusted so that (1) suppression is performed on only the distortion component generated within a predetermined frequency range out of the range of frequencies to be suppressed in which distortion components to be suppressed occur or (2) the suppression of the distortion component generated within the predetermined frequency range is greater than the suppression of the distortion component generated within the frequency range other than the predetermined frequency range out of the range of frequencies to be suppressed, and the pre-distortion circuit is adjusted so that at least the distortion component generated within the frequency range other than the predetermined frequency range is suppressed.

Growing community of inventors

Yokosuka, Japan

Seiji Fujiwara