Patents Assigned to Central Research Institute of Electric Power Ind.
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Publication number: 20120087167Abstract: Disclosed is a power conversion device which achieves reductions in switching loss due to a reverse recovery current and heat generation loss. Specifically disclosed is a power conversion device provided with a cascode element configured by electrically connecting a normally-on switching element and a normally-off switching element in series and connecting a gate terminal of the normally-on switching element and a source terminal of the normally-off switching element via a cascode connection diode, and a high-speed diode electrically connected in parallel with the cascode element and having a cathode region connected to a positive electrode terminal and an anode region connected to a negative electrode terminal.Type: ApplicationFiled: December 20, 2011Publication date: April 12, 2012Applicants: Central Research Institute of Electric Power Ind., KABUSHIKI KAISHA TOSHIBAInventors: Atsuhiko KUZUMAKI, Hiroshi MOCHIKAWA, Takeru MURAO, Masahiro TAKASAKI, Tadao ISHIKAWA, Toshiaki KIKUMA
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Publication number: 20110261921Abstract: A fuel assembly is charged in a reactor core of a nuclear reactor using a liquid metal as a coolant, and includes a wrapper tube storing a plurality of fuel pins and including an entrance nozzle for introducing the coolant and an operation handling head, grids disposed in the wrapper tube to support the fuel pins in the radial direction of the wrapper tube, liner tubes inserted in the wrapper tube to fixedly hold the respective grids in the axial direction of the wrapper tube, and a fixing device for fixing the grids and the liner tubes in the radial direction of the wrapper tube.Type: ApplicationFiled: December 26, 2006Publication date: October 27, 2011Applicants: Central Research Institute of Electric Power Ind., KABUSHIKI KAISHA TOSHIBAInventors: Tomonari Koga, Satoshi Nishimura, Izumi Kinoshita, Shoichi Moriya, Yasushi Tsuboi, Mitsuo Wakamatsu, Yoshiaki Sakashita, Masatoshi Nakagawa
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Publication number: 20110110485Abstract: A fuel assembly is charged in a reactor core of a nuclear reactor using a liquid metal as a coolant and includes a wrapper tube storing a plurality of fuel pins and including an entrance nozzle at a lower end thereof for introducing the coolant and an operation handling head at an upper end thereof, grids for supporting the plurality of fuel pins in the wrapper tube in the radial direction of the wrapper tube, liner tubes inserted in the wrapper tube for fixedly holding the grids in the axial direction of the wrapper tube, and peripheral flow suppressing members disposed in a peripheral flow passage extending between peripherally disposed ones of the fuel pins and the wrapper tube over a length corresponding to a heat generation length, which is a length range in the axial direction of the fuel pins storing a radioactive fuel material.Type: ApplicationFiled: December 26, 2006Publication date: May 12, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, Central Research Institute of Electric Power Ind.Inventors: Tomonari KOGA, Satoshi NISHIMURA, Izumi KINOSHITA, Yasushi TSUBOI, Masatoshi NAKAGAWA
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Publication number: 20100108600Abstract: A method and apparatus for treatment of a water-containing material. The method includes: (A) bringing a liquid of a substance in a gaseous state under normal temperature and pressure conditions into contact with a water-containing material; (B) obtaining a liquid layer through solid-liquid separation from a treated product resulting from (A); (C) vaporizing and extracting at least a portion of the substance that is in the gaseous state under normal temperature and pressure conditions as gas from the liquid layer obtained from (B); and (D) collecting a lower layer resulting from liquid-liquid separation conducting on a liquid layer resulting from (C). The method and apparatus achieve efficient treatment of a water-containing material and allow the material after the treatment to be recycled as a resource.Type: ApplicationFiled: January 30, 2008Publication date: May 6, 2010Applicants: Central Research Institute of Electric Power Ind., Tsukishima Kikai Co., Ltd.Inventors: Hideki Kanda, Hisao Makino, Mayumi Morita, Keizo Takegami, Akio Yoshikoshi, Masazumi Takahashi
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Publication number: 20100101928Abstract: The present invention is to provide means by which energy required for treating sewage sludge can be saved.Type: ApplicationFiled: March 6, 2008Publication date: April 29, 2010Applicants: Central Research Institute of Electric Power Ind., TSUKISHIMA KIKAI CO., LTD.Inventors: Hideki Kanda, Hisao Makino, Mayumi Morita, Keizo Takegami, Akio Yoshikoshi, Masazumi Takahashi
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Publication number: 20080202127Abstract: A cooling system for a superconducting power apparatus including a reservoir tank for reserving a liquefied gas, a circulating pump, a heat exchanger for cooling the liquefied gas, and a circulation loop through which the liquefied gas is circulated, the superconducting power apparatus being cooled by circulating the liquefied gas in a subcooled state using the circulating pump. The cooling system further includes a pressurizing mechanism for pressurizing the liquefied gas in the reservoir tank with the same type of gas as the liquefied gas, wherein a liquid level in the reservoir tank for reserving the liquefied gas in a pressurized state is located above an outlet of a return piping of a circulating liquefied gas at least by a dissolving depth of the pressurizing gas+(plus) a liquid level movement correction amount.Type: ApplicationFiled: June 15, 2005Publication date: August 28, 2008Applicants: The Furukawa Electric Co, Ltd., Central Research Institute of Electric Power Ind.Inventors: Shinichi Mukoyama, Noboru Ishii, Masashi Yagi, Satoru Maruyama, Tatsuki Okamoto, Hiroshi Suzuki, Michiharu Ichikawa, Toshihiro Takahashi, Shirabe Akita
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Publication number: 20070204698Abstract: A pressure sensor and a pressure measuring device are provided applicable to a variety of pressure detection targets and capable of measuring a surface pressure. The pressure sensor is configured by laminating a metal layer made of a metal film, an elastic member layer made of a non-metal material, and a coil layer including an exciting coil. Also, as for a sensor sheet on which sensors that each measure point pressure are arranged in an array, variable elements of the elastic member layer and the coil layer are appropriately changed, thereby forming sensors with a single sheet that are different in pressure detection accuracy or pressure detection range for predetermined areas. Also provided is a pressure measuring device that controls exciting timing or frequency of applied voltage of each exciting coil on a sensor sheet.Type: ApplicationFiled: April 3, 2007Publication date: September 6, 2007Applicant: Central Research Institute of Electric Power Ind.Inventors: Hiroyuki Fukutomi, Takashi Ogata
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Publication number: 20070062800Abstract: A dehydration method of a water-containing substance using a liquefied matter, including a step (1) of contacting a liquefied matter of a substance which is in a gas phase under a condition at ambient temperature and atmospheric pressure with the water-containing substance, to dissolve contained water in the water-containing substance into the liquefied matter, for obtaining the liquefied matter containing a large amount of water; and a step (2) of vaporizing the substance out of the liquefied matter containing a large amount of water, to thereby separate the substance as the gas from water.Type: ApplicationFiled: May 12, 2006Publication date: March 22, 2007Applicant: Central Research Institute of Electric Power Ind.Inventors: Hideki Kanda, Youichi Urakawa