Search Results 1-20 of 14677

  • Recent Progress in Efficient Gas–Solid Cyclone Separators with a High Solids Loading for Large-scale Fluidized Beds

    Fushimi Chihiro , Yato Kentaro , Sakai Mikio , Kawano Takashi , Kita Teruyuki

    … <p>Circulating fluidized beds (CFB)s are important technical equipment to treat gas–solid systems for fluid catalytic cracking, combustion, gasification, and high-temperature heat receiving because their mass and heat transfer rates are large. … Cyclones are important devices to control the performance of CFBs and ensure their stable operation; …

    KONA Powder and Particle Journal, 2021



    HASEGAWA Kenichi , YOSHINO Hiroshi , GOTO Tomonobu

    … <p> According to statistical data reported by the Japanese government, the major causes of death for Japanese people are cancer, heart disease and cerebrovascular disease. … One possible reason for this seasonal difference is that exposure to low temperatures can cause fluctuations in blood pressure. …

    Journal of Environmental Engineering (Transactions of AIJ) (768), 169-176, 2020-02


  • X-ray and Neutron Study on the Structure of Hydrous SiO2 Glass up to 10 GPa

    Urakawa Satoru , Inoue Toru , Hattori Takanori , Sano-Furukawa Asami , Kohara Shinji , Wakabayashi Daisuke , Sato Tomoko , Funamori Nobumasa , Funakoshi Ken-ichi

    … The structure of hydrous amorphous SiO2 is fundamental in order to investigate the effects of water on the physicochemical properties of oxide glasses and magma. …

    Minerals 10(1), 84, 2020-01-20


  • Energy Efficiency Improvement of CO<sub>2</sub> Methanation Process by using a Thermally Self-Sustained Two-Stage Reactor: Preliminary Evaluation of a Reactor Concept  [in Japanese]

    Sayama Shogo , Yamamoto Seiji

    <p>CO<sub>2</sub>とH<sub>2</sub>からCH<sub>4</sub>を合成する二段メタン化反応器で,自己の発熱のみで両段の反応を維持しながら低反応圧で高転化率(≥99%)と高熱回収率(プロセス内余剰熱の回収割合)を実現するための手法を提案し,その有効性を実験的に検証した.CO<sub …

    KAGAKU KOGAKU RONBUNSHU 46(3), 63-70, 2020


  • Influence of Molding Conditions on Mechanical Properties in High Cycle Molding of GF/PA 66 Composites Using Commingled Yarn Fabric as an Intermediate Material  [in Japanese]

    Saito Taiga , Ohtani Akio , Nakai Asami

    … <p>   For the purpose of high cycle molding for continuous fiber reinforced thermoplastic composite (c-FRTP), the effect of the temperature condition on the mechanical properties of the molding product was examined. … A woven fabric using a commingled yarn of glass fiber (GF) and polyamide 66 (PA 66) fiber was used as an intermediate material. … The rapid heating and cooling method was used for molding c-FRTP with the intermediate material. …

    Seikei-Kakou 32(5), 183-189, 2020


  • Cooling and condensation heat transfer and pressure drop of a refrigerant at high pressures in a chevron-type plate heat exchanger with high chevron angle

    MIYATA Kazushi , YAMASAKI Yuki , KUROSE Kizuku , HAMAMOTO Yoshinori , MORI Hideo , UMEZAWA Shuichi

    … <p>In industrial fields, heat source over 130°C are widely needed, and for this development of industrial high-temperature heat pump systems has been promoted. … For the heat release process in such the heat pump systems, it is considered to use of a plate heat exchanger (PHE) in which a high pressure working refrigerant flows. …

    Mechanical Engineering Journal, 2020


  • Accuracy improvement of a flowmeter for steam and air to be set on the outside of a pipe utilizing a circumferential heater

    UMEZAWA Shuichi , SUGITA Katsuhiko

    … <p>A clamp-on type flowmeter for steam and air, which does not require pipe-cutting for installation, is needed for diagnosing performance and saving energy in facilities such as factories and power plants. …

    Mechanical Engineering Journal, 2020


  • Changes in urinary catecholamine, heart rate, blood pressure and double product during ascent of one-day Mt. Fuji hiking in Japanese young males

    Takagi Yusuke , Aikawa Yuki , Yamada Norihiro , Seki Kazutoshi , Ogiso Yosuke , Kobuchi Takayuki , Kawagishi Taketo , Ando Yuji , Fukuchi Kaori , Tsubota Shusuke , Yoshikawa Akari

    … <p>We investigated changes in the basic parameter of physiological stress such as catecholamine and heart rate, blood pressure during the ascent of one-day Mt. Fuji hiking via the Fujinomiya Trail. …

    The Journal of Physical Fitness and Sports Medicine 9(3), 143-148, 2020


  • Investigation for Contact Interface of Mechanical Lap Joint Fabricated with High-Temperature Superconducting Conductor Using X-Ray Microtomography

    CHEN Weixi , ITO Satoshi , YUSA Noritaka , HASHIZUME Hidetoshi

    … <p>Joint winding of high-temperature superconducting (HTS) helical coil with conductor segments that are connected using bridge-type mechanical lap joints is considered as a promising method of fabricating magnet for a FFHR heliotron-type fusion reactor. … Although methods for joining large-scale HTS conductor has been developed using the "simple-stack" and "joint-piece" procedures, the difference between these procedures is unclear. …

    Plasma and Fusion Research 15(0), 2405014-2405014, 2020


  • Chemical Plant Fire Caused by Flooding of 2017 Hurricane Harvey in Texas, USA  [in Japanese]

    Yoshida Shoichi

    … Organic peroxides are unstable chemicals which continually decomposed with heat generation at a rate that depends on their temperature. … They need to remain at a low temperature in cold storage. … Arkema Crosby plant lost all power and refrigeration capability in the hurricane flooding. … Organic peroxide products stored inside refrigerated trailers decomposed, causing the peroxide and the trailers to burn. …

    Journal of High Pressure Institute of Japan 58(2), 110-121, 2020


  • A CFD Study on Refractory Wear in RH Degassing Process

    Wang Qiang , Jia Shuyuan , Qi Fengsheng , Li Guangqiang , Li Yawei , Wang Tao , He Zhu

    … The breakup and coalescence of gas bubble was taken into account, and moreover the bubble diameter changed with static pressure. … The wall shear stress and turbulence intensity were employed to predicate the erosion rate of the lining refractory, while the diffusion coefficient of the refractory material and the slag property at high temperature were used to consider the corrosion rate. …

    ISIJ International, 2020


  • Pressure generation in the Kawai-type multianvil apparatus and rheology of the Earth's interior  [in Japanese]

    YAMAZAKI Daisuke

    … <p>In this paper, I introduce three topics of my researches including the technical development of high pressure generation in the Kawai-type multianvil apparatus and rheological studies for the lower mantle and the inner core, as follows: (i) We extended the attainable pressure of the Kawai-type multianvil apparatus to 120.3 GPa at room temperature by equipping sintered diamond cubic anvils. …

    Japanese Magazine of Mineralogical and Petrological Sciences 49(1), 15-27, 2020


  • Chemical reaction of the reduced carbon and hydrogen species and effect on phase relation of the silicate minerals under the interior of the Earth  [in Japanese]


    … <p>The deeper part of the Earth's mantle is considered to be reduced state where CH<sub>4</sub>, H<sub>2</sub>, and hydrocarbons would exist. … Thus, the reduced species of carbon-hydrogen compounds are likely to play an important role in the deep cycle of carbon and hydrogen at the upper mantle. … fluid on stability and phase relation of silicate minerals were investigated on MgO-SiO<sub>2</sub>-H<sub>2</sub> …

    Japanese Magazine of Mineralogical and Petrological Sciences 49(1), 28-34, 2020


  • Effects of Ambient Temperature and Carbon Dioxide on Isolated Droplet Burning Behavior of Oxidatively Degraded Methyl Oleate in Microgravity  [in Japanese]

    Shion ANDO , Yuxiang WU , Shinji NAKAYA , Mitsuhiro TSUE

    … <p>Effects of the ambient temperature on oxidatively degraded methyl oleate (OME) droplet combustion were studied by conducting droplet combustion experiments at high temperature (750 ℃) and room temperature. … Droplet combustion experiments were conducted at atmospheric pressure in air or CO<sub>2</sub> …

    Journal of the Combustion Society of Japan, 2020


  • Study on Field Demonstration of High Sensitivity SF<sub>6</sub> Leakage Detection Method for Gas Insulated Switchgear  [in Japanese]

    Tatemi Masaru , Inami Hisao , Rokunohe Toshiaki , Hirose Makoto

    … gas leakage with high sensitivity is necessary. … The authors proposed an algorithm to accurately estimate the average gas temperature from the tank surface temperature for establishing a high sensitive SF<sub>6</sub> …

    IEEJ Transactions on Power and Energy 140(5), 409-414, 2020


  • DNS of turbulent heat transfer in pulsating channel flow  [in Japanese]

    YAMAZAKI Tatsuro , ODA Yutaka , MATSUMOTO Ryosuke , KATSUKI Masashi

    … <p>A pulsating turbulent channel flow at constant wall temperature difference condition is studied by direct numerical simulation (DNS) to clarify the effect of pulsation frequency on turbulence statistics and heat transfer. … The flow pulsation was forced to a turbulent channel flow by sinusoidal variation of pressure gradient. … = 19.8, 28.0, 39.6 and 56.0 at steady-state friction Reynolds number, <i>Re<sub>τs</sub></i> …

    Transactions of the JSME (in Japanese) 86(884), 19-00197-19-00197, 2020


  • Low-temperature Linear Friction Welding of Metal and Alloys with 100% Joint Efficiency  [in Japanese]

    FUJII Hidetoshi

    … A new welding method called low-temperature linear friction welding has been developed for joining various kinds of materials such as aluminum alloys, steel and dissimilar materials. … For heat-treatable aluminum alloys such as the 6000 series alloys, an approximate 70% joint efficiency is generally obtained even when using friction stir welding, because the precipitates are coarsened or disappear due to the high welding temperature. …

    Journal of Light Metal Welding 58(Supplement), 8s-13s, 2020


  • Heat Transfer Fluid  [in Japanese]

    BAI Beck , MIZUMOTO Keiichi

    … <p>Talking about the way to heat and to cool, there is direct heating method such as direct fire. … In order to control the temperature precisely to avoid local heating, most industries tend to use indirect heating by applying heat transfer fluid. … However it is required to be high pressure at high temperature, and freeze in 0 degree, which has some restrictions. …



  • Surface wettability enhancement on oxide film coated-steels due to gamma-ray irradiation

    SUSANTO Wilson , IHARA Tomonori , HAZUKU Tatsuya , MOROOKA Shinichi , KANO Sho

    … <p>Regarding a severe accident of supercritical water-cooled reactor (SCWR), phase change between subcritical and supercritical conditions is crucial since heat transfer rate changes massively causing a dryout accident. … Fundamental knowledge on surface wettability and boiling heat transfer on metals at subcritical conditions under radiation are, thus, important in thermal-hydraulic design and safety analysis of reactor core in light water reactors including a supercritical water-cooled reactor. …

    Mechanical Engineering Journal, 2020


  • Examination of sublimable substances as propellants for ion engines  [in Japanese]

    ADACHI Misaki , YAMAMOTO Naoji , NAKANO Masakatsu , OKAWA Yasushi , FUNAKI Ikkoh

    <p> 宇宙太陽光発電においては大量の物資輸送が求められ,そのためには膨大な推進剤が消費される.現在の主流となっているキセノンは高価であるため,現実的ではない.そこで我々は,常温常圧で固体であり昇華性を持つ物質を推進剤として使用することを提案する.固体推進剤を使用することにより,高圧タンクやシステム全体の大幅な削減も期待でき,より低価格の軌道間輸送システムが構築可能となる.昇華性推進剤 …

    Space Solar Power Systems 5(0), 65-67, 2020


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