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21.
HIDEO SUGAHARA NAOKI KAMATA YUSUKE TODA MASAKAZU KATO KAZUYUKI AIHARA 《Electrical Engineering in Japan》2018,202(1):11-28
Feed‐in tariff (FIT) has been enforced in order to promote the utilization of renewable energy since 2012 in Japan. In consideration of FIT, we propose an integration plan for incinerator plants (IPs) with highly efficient power generation for the whole area of a prefecture. The plan includes disposal of forest biomass using the reserve capacity of IPs. The model prefecture's population is set to 1,200,000 and the proportion of the forested area is set to 70% of the model area based on data for northeastern Japan. The present 16 IPs are integrated into three new IPs. A relay transportation (RT) facility for waste is located at a decommissioned IP, and the waste from the area is transported to the new IP. In order to calculate the RT costs, an approximation formula for the RT distance is estimated via the IPs integration study. The plan will realize about 37% cost reduction and 1.8‐fold CO2 reduction including RT as compared to the plan to update the current IP situation. Forest biomass of 56,500 tons per year, which is about 43% of available forest biomass volume in the model prefecture, can be disposed of at new IPs. On the other hand, enough profit is not expected from the dedicated biomass power generation plant as a result of wood chip processing fees. The plan will help to develop local forestry. 相似文献
22.
大长高比腔体内的混合流体行进波对流 总被引:3,自引:1,他引:2
该文报告大长高比腔体(Г=46)中强非线性状态(ψ=-0.47)混合流体行进波对流图案的数值模拟结果。利用MAC法通过二维流体力学扰动方程组进行了数值模拟。获得了发生在对流发生点附近的线性Counter propagatingwave,出现在分叉图非线性分支上的均匀行进波和发生在分叉图saddle-node附近的局部行进波状态等三种行进波对流图案,并探讨了它们的稳定性。最后将数值模拟结果与实验结果进行了比较。 相似文献
23.
The physicochemical properties of sesame 13S globulin gels containing fatty acid salts (FAS) were investigated. The softness, water-holding ability and transparency of the gels markedly increased in the presence of sodium oleate (NaCl18:1) or sodium linoleate (NaC18:2) at a 75 molar ratio to a molecule of the 13S globulin. The effect was not observed by the addition of sodium caprylate (NaC8:0). Scanning electron microscopy showed that a very fine network structure was formed in the gel with 75 molar ratio of NaC18:2. The addition of a suitable amount of FAS having a moderate length and an unsaturated carbon chain could improve the water-holding ability and transparency of the 13S globulin gel. 相似文献
24.
KAYOKO TAKAGI MASATAKE TOYODA YUKIO SAITO MOTOHIRO NIWA HIDEO MORIMOTO 《Journal of food science》1990,55(2):455-457
Continuous fermentation of grape juice was carried out in a packed bed column system using Lactobacillus casei adsorbed onto ceramic beads. Chemical components in the reaction vessel of this system were compared with those of a free-cell fermentation. No major differences were noted in the principal components. Diacetyl and methionine levels decreased, however, whereas aspartic acid and cysteine increased. Silica levels increased immediately after initiation of the immobilized cell culture due to elution from the ceramic carrier beads. In two of the five trials the reactor was contaminated with Bacillus megaterium. 相似文献
25.
HIDEO TORAYA MASAHIRO YOSHIMURA SHIGEYUKI SMIYA 《Journal of the American Ceramic Society》1983,66(2):148-150
Fine monoclinic HfO2 powders were prepared from Hf metal chips by reaction with high-temperature high-pressure water. Dependence of the reaction on temperature-pressure-time was examined in both closed and open systems. Hydrothermal oxidation of Hf proceeded through three stages: the surface oxidation of Hf metal chips with H2 O, the reaction of the Hf with released H2 to form hydrides, and the succeeding oxidation of the hydrides with H2 O to form HfO2 . Most of the fine HfO2 powders were, however, considered to be formed by the latter two reactions after the cracking and pulverizing of metal chips associated with hydriding. The difference in the reaction rates between the closed and open systems was explained by taking into account the fugacity relations of H2 and H2 O in the respective systems. 相似文献
26.
Preparation of High-Strength Calcium Phosphate Glass-Ceramics by Unidirectional Crystallization 总被引:1,自引:0,他引:1
YOSHIHIRO ABE TOSHIHIRO KASUGA HIDEO HOSONO K. DE GROOT 《Journal of the American Ceramic Society》1984,67(7):142-C
Unidirectionally crystallized CaO-P2 O5 glass-ceramics were produced by reheating glass rods between 450° and 580°C (glass transition temperature ∼500°C) under a temperature gradient of 30°C/cm. These glass-ceramics exhibit high bending strength (∼650MN/m2 ) and toughness. Sample preparation is described and compared with conventional unidirectional solidification of melts. The characteristic mechanical properties are discussed in terms of the texture of the glass-ceramics. 相似文献
27.
NAOKI WAKAMIYA MASAYUKI MURATA HIDEO MIYAHARA 《International Journal of Communication Systems》1996,9(1):23-33
We treat traffic control methods for the multimedia ATM LAN, in which two service classes are considered; one is for high-speed data transfer based on a fast reservation protocol (FRP service class) and the other is for the continuous bit rate (CBR) traffic such as motion video (CBR service class). Through an analytic method, the performance of the CBR service class traffic is shown to be heavily affected by the FRP service class traffic. Thus, we introduce a reserved bandwidth for the CBR service class to guarantee some appropriate level of performance for the CBR service class. With the reserved bandwidth for CBR service class, the performance of CBR service class can be preserved from being affected by the FRP class traffic load. 相似文献
28.
YUTA NAKAMURA RYOICHI HARA HIROYUKI KITA EIICHI TANAKA 《Electrical Engineering in Japan》2018,204(3):21-30
From growing interests in the environment issues, promotion of photovoltaic power generation (PV) is accelerated in the world. Meanwhile, rapid chargers (RCs) for popularized electric vehicles are being installed in urban areas. These two trends in distribution system might cause severer voltage fluctuation problems. On the other hand, a RC can provide the reactive power support, which is capable of voltage regulation. Based on this viewpoint, this paper proposes a new framework of voltage regulation, in which the reactive power compensation by RCs is actively utilized. The proposed voltage regulation method combines two different control functions with consideration for over‐compensation avoidance. This paper ascertains the validity of proposed voltage regulation method through numerical simulations. 相似文献
29.
KENJI HIRAMOTO HIDEO NAKAI EIJI YAMADA RYOJI MIZUTANI 《Electrical Engineering in Japan》2018,204(3):53-60
In this study, a traction drive electric motor was designed with a new magnet‐free motor design technique where electromagnets are generated on a rotor by utilizing changes in the spatial second harmonic of the magnetic fields. To apply the proposed technique to electric motor design, balancing the rotor and stator magnetomotive force is important. This paper presents design methods for adjusting the rotor and stator magnetomotive forces. A test motor was designed with these design methods and evaluated using a motor bench. The analytical and measurement data indicated that the proposed motor performed comparably to magnet motors. 相似文献
30.
Two optimal control problems which have the same optimal feedback control laws and identical minimum costs are said to be equivalent. The conditions for the equivalence of two optimal control problems have been presented by other authors, but it seems that the equivalence conditions given by other authors are not complete. In this paper, a necessary and sufficient condition for the equivalence classes is derived. 相似文献