Hitachi, Ltd.

Renesas Technology Corp.

Kao Corporation

Hitachi Metals, Ltd.

Hitachi Device Engineering Co., Ltd.

Shibuya Kogyo Co., Ltd.

Takao Ishikawa

Shinji Yamada

Hiroshi Nakano

Keiji Watanabe

Atsushi Shimada

Takeyuki Itabashi

Satoru Amou

Atsushi Sato

Futoshi Furuta

Masatoshi Sugimasa

Ken Takahashi

Tadashi Sano

Takao Miwa

Hiroshi Kanemoto

Tomoji Oishi

Yuzo Shirakawa

Masafumi Nojima

Takashi Naito

Akira Nagai

Hiroto Naito

Daigoro Kamoto

Hiroki Yamamoto

Masahiro Nishizawa

Takashi Namekawa

Shigenori Togashi

Akiyoshi Komura

Yasutaka Suzuki

Norikazu Uchiyama

Shigehisa Motowaki

Kenichi Souma

Tadanori Segawa

Masafumi Noujima

Osamu Shiono

Daigorou Kamoto

Toshio Ogawa

Toshiya Satoh

Akio Takahashi

Takeshi Atago

Kinya Aota

Kiyoshi Miura

Shigeru Azuhata

Hisao Yamashita

Yukinobu Maruyama

Hiroshi Arita

Osamu Kuroda

Yuichi Sawai

Hiroatsu Tokuda

Hiroaki Hasegawa

Yuichi Kitahara

Youichi Horii

Hidehiro Iizuka

Toshio Tojo

Sunao Funakoshi

Mitsutoshi Honda

Hirotoshi Ishimaru

Yoshitaka Morimoto

Toshifumi Hiratsuka

Akinori Nishide

Hiroshi Hanaoka

Yasuo Yoshii

Tetsuro Miyamoto

Hiroshi Tobita

Naoki Yoshimoto

Toshiyuki Ohmori

Akihiro Sato

Kazuhiro Yamamura

Shinichi Endo

Yasuaki Kotani

Sachiko Maekawa

Shinichi Ichikawa

Toshiya Sato

Sachiko Okuzaki

Nobuo Miyazaki

Takahiro Shinagawa

Sigeru Akezawa

Chikako Yoshioka

Daikoh Takamatsu

An object of the present invention is to provide a fuel cell power generation system that can attain a higher fuel utilization rate and can also attain higher power generation efficiency simultaneously. The fuel cell power generation system includes an oxide-ion-conducting first fuel cellthat performs reformation of a fuel containing hydrocarbon and power generation and a proton-conducting second fuel cellthat performs power generation by being supplied with hydrogen from the first fuel cell. The fuel utilization rate of the first fuel cellcan be set to 30% or lower, for example, and the fuel utilization rate of the second fuel cellcan be set to 70% or higher, for example. By adopting such a multi-stage configuration, it is possible to increase the power generation efficiency as a whole and to also attain a high fuel utilization rate simultaneously.

Fuel cell power generation system

Provided is a device that uses a high-temperature exhaust gas released from an internal combustion engine to produce a fuel. The present invention relates to the fuel production device including the internal combustion engine, an electrolysis device connected to the internal combustion engine, and a hydrogenation reactor connected to the electrolysis device, wherein the electrolysis device is a device for decomposing high-temperature water vapor contained in the exhaust gas from the internal combustion engine into hydrogen and oxygen, and the hydrogenation reactor is a device for converting the hydrogen resulting from the decomposition to the fuel.

Fuel production device

The invention provides a cogeneration system capable of adjusting a heat-to-electric power ratio not only in an increasing direction, but also in a decreasing direction. The cogeneration system includes: a power generation device configured to supply electric power; a first heat exchanger configured to exchange heat between exhaust of the power generation device and water, so as to lower a temperature of the exhaust and obtain steam from the water; a reformer configured to generate a reformed gas by the steam reacting with a fuel; a second heat exchanger configured to cool the reformed gas generated by the reformer by heat exchanging; a reformed gas supply device configured to supply the reformed gas cooled by the second heat exchanger to the power generation device; a distributor configured to supply the steam to at least one of the reformer and a heat utilization device; and a control device configure to adjust a heat-to-electric power ratio by changing a supply destination of the steam in the distributor.

Cogeneration system

An ethanol engine system stabilizes components of reformed gas generated by a reformer and a calorific value of fuel supplied to an engine. The ethanol engine system includes a reservoir tank for an aqueous ethanol solution, a first supply device that supplies the aqueous ethanol solution to the reformer, a separator that cools mixed gas fed from the reformer, including the reformed gas, condenses water vapor included in the mixed gas and separates into gas and liquid, a reformed gas supply device that supplies the reformed gas separated by the separator to the engine, a recovery tank that collects a recovery solution separated by the separator, and a first recovery solution supply device that supplies the recovery solution in the recovery tank to the reformer or a second recovery solution supply device that supplies the recovery solution in the recovery tank to a combustion chamber of the engine.

Ethanol engine system

Provided is a power conversion system having a solid-oxide fuel cell capable of stably generating electricity from hydrogen generated by an organic hydride. The power conversion system includes a solid-oxide fuel cell, a reactor for producing hydrogen and a dehydrogenation product from an organic hydride by dehydrogenation reaction, and a heat engine for generating motive power. The power conversion system separates the hydrogen produced by the reactor, and supplies the hydrogen as fuel to the solid-oxide fuel cell. Exhaust heat of the heat engine is supplied to both the solid-oxide fuel cell and the reactor.

Power conversion system

It is an objective of the invention to provide a method for operating hydrogen separation devices which is capable of efficiently suppressing hydrogen embrittlement in a hydrogen separation alloy membrane and to provide a hydrogen separation device that performs favorably during repeated starting/stopping operations thereof. There is provided a method for operating a hydrogen separation device for separating hydrogen from a mixture hydrogen gas using a membrane separation technique with a hydrogen separation alloy membrane. The method comprises the successive steps of: stopping supply of the mixture hydrogen gas to the hydrogen separation alloy membrane with a temperature of the membrane within a range from 300 to 600&#xb0; C.; supplying an oxidizing gas over a predetermined duration to at least an upstream side of the membrane with a temperature of the membrane within a range from 300 to 600&#xb0; C.; and lowering the temperature of the membrane to below 200&#xb0; C.

Hydrogen separation device and method for operating same

A renewable energy storage system that stores renewable energy, includes: an electrical power generator that converts renewable energy into electrical power; an electrical storage device that stores the electrical power; a hydrogen production device that produces hydrogen using the electrical power from the electrical power generator and/or the electrical power stored in the electrical storage device; a hydrogenation device that adds the hydrogen produced by the hydrogen production device to the unsaturated hydrocarbon; a saturated hydrocarbon storage device that stores the saturated hydrocarbon produced by the addition of the hydrogen to the unsaturated hydrocarbon; an unsaturated hydrocarbon storage device that stores the unsaturated hydrocarbon; and an unsaturated hydrocarbon supply controller that controls the supply of unsaturated hydrocarbon stored in the unsaturated hydrocarbon storage device to the hydrogenation device.

Renewable energy storage system

An engine system with a reformer, wherein an unreformed fuel is reformed by the reformer mounted in an exhaust pipe, and wherein a reformed fuel containing hydrogen is supplied to an engine. The engine system with a reformer includes a controller which, when the hydrogen generated by the reformer is supplied to the engine, determines a target heat generation beginning timing in accordance with a load applied to an engine, an engine speed, and an air excess ratio of an air-fuel mixture, and which controls an ignition timing of the engine so that a difference between a current heat generation beginning timing and the target heat generation beginning timing of the engine is within a predetermined range.

Engine system with reformer

In an engine system with a reformer being installed in an exhaust pipe to reform a fuel, a control valve for controlling a flow rate of exhaust gas is provided downstream from an installed position of the reformer in the exhaust pipe. In the engine system with the reformer, since a part of the exhaust gas can be trapped in a space between the reformer and an engine chamber by closing the control valve during an exhaust stroke, the reforming efficiency of the reformer can be heightened.

Disclosed is an engine system with a reformer, the engine system comprising a reformer and driving an engine using, as a fuel, a reformed fuel produced by reforming pre-reformed fuel with the reformer, in which the reformer is connected with both a pre-reformed fuel supply adjustment unit which adjusts the amount of the pre-reformed fuel supplied to the reformer and a reformed fuel supply adjustment unit which adjusts the amount of reformed fuel supplied to the engine, and the reformer is installed adjacent to the engine combustion chamber via the reformed fuel supply adjustment unit.

An engine system includes a medium which chemically repeats storage and release of hydrogen to provide an engine system where CO2 emissions can be suppressed and system efficiency is excellent. The engine system includes a hydrogen supply device for producing hydrogen rich gas from a medium which chemically repeats the storage and release of hydrogen, and drives an engine using the hydrogen rich gas produced in the hydrogen supply device as one of the fuels. This engine system is characterized by comprising a waste heat supply device for supplying waste heat of the engine to hydrogen supply device, a generator which generates electricity by power of the engine, an energy storage device for storing electric power produced by the generator, and a motor for converting electric power discharged from the energy storage device into power.

Engine system

Recovery of dehydrogenation product must be done separately from supply of hydrogen fuel. However, there is a problem that it takes much time when dehydrogenation product recovery and fuel filling are done separately. A fuel filling/waste solution recovery apparatus includes measuring means to measure a volume of supplied fuel and a volume of recovered waste solution by measuring flow rates of solutions passing through a fuel filling nozzle and a recovery nozzle or piping, and a display which shows the volume of supplied fuel and the volume of recovered waste solution which are measured by the measuring means.

Fuel filling and waste solution recovery apparatus and fuel vessel

Managing system for emissions environmental pollutants comprising: a measuring device for measuring a flow rate of a fuel supplied to a customer; an unit emission quantity storage device of environmentally influential substance for storing a unit emission quantity of an environmentally influential substance emitted when an unit flow rate of fuel is manufactured or processed; and an emission quantity computing device of environmentally influential substance for calculating, based on the fuel flow rate measured by the measuring device, and the unit emission quantity of the environmentally influential substance stored by the unit emission quantity storage device, an environmental emission quantity of the environmentally influential substance emitted when the fuel supplied to the customer is manufactured or processed.

Managing system and method for emissions of environmental pollutants

An engine system in which hydrogen is employed as a fuel, including a reactor configured to cause a reaction using a catalyst, in which the reactor is constituted by alternately disposing plural exhaust passages and plural fuel passageways of the engine system with a wall interposed therebetween; at least one carrier configured to carry the catalyst and to be formed in a substantially rectangular plate shape is fitted in at least one of fuel passageways; and the carrier is provided with a plate portion which has a surface disposed in a fuel flowing direction and is formed in a substantially rectangular plate shape and at least one slit portion which divides the surface of the plate portion in the fuel flowing direction.

In a fuel tank for containing a hydrogen storing material and a product generated by dehydrogenation reaction of the hydrogen storing material, comprising, a fuel chamber for containing the hydrogen storing material, a waste chamber for containing the product, and a tank envelope for containing the fuel chamber and the waste chamber, the fuel tank further comprises a partition wall fluidly separating the fuel chamber and the waste chamber from each other and being movable to change a ratio in volume between the fuel chamber and the waste chamber, and each of the fuel chamber and the waste chamber has a valve to be hermetically closed.

Fuel tank including movable or deformable fuel chamber and waste chamber

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Hitachi, Japan

Takao Ishikawa