著者

藤松 孝裕 廣田 真史 藤田 秀臣 岡田 修 鈴置 純

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 B編 (ISSN:03875016)

巻号頁・発行日

vol.68, no.673, pp.2534-2541, 2002-09-25 (Released:2008-03-28)

参考文献数

19

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The deformation of the interface between a water drop and silicone-oil surface impacted by it was examined in detail. Special attention was directed to the influences of the water-drop diameter dL on the deformation of oil surface and on that of the water drop itself after the impact with the oil surface. The drop diameter was varied from 1.9 mm to 4.1 mm. The influences of dL on the shape of oil cavity at its maximum depth and on the drop shape at its maximum spread were observed conspicuously in case of minimum oil viscosity of vT=5 mm2/s. It was also found that both the maximum cavity depth ratio DM/dL and the maximum diametral deformation ratio dM/dL became smaller as dL was increased. These deformation parameters DM/dL and dM/dL could be well correlated with the impact velocity of drop uL for each oil viscosity. Moreover, in Case B, C and D, DM/dL could be correlated by a dimensionless group ReTLWeTL, and dM/dL was correlated by Re2LOh for highly viscous silicone oil of vT ≥ 5 × 103 mm2/s.

著者

宮崎 博之 伊藤 翼 中山 浩 廣田 真史

出版者

公益社団法人 空気調和・衛生工学会

雑誌

空気調和・衛生工学会大会 学術講演論文集 令和元年度大会(札幌)学術講演論文集 第3巻 空調システム 編 (ISSN:18803806)

巻号頁・発行日

pp.209-212, 2019 (Released:2020-10-31)

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個別分散空調は、室外機の設置状況(壁近傍、集中設置等)によっては、高温(冷房時)の吹出空気を吸込面から直接吸込むショートサーキットが生じ、能力が低下することが知られている。本研究では、室外機の設置状況、外気温度、負荷率によりショートサーキットがエアコンの性能に与える影響を定量的に把握することを目的にする。本報では環境試験室に建物壁や障害物を模擬した壁を設置し、室外機の吸込温度と外気温の関係について明らかにしたので報告する。

著者

西村 顕 北川 諭 柿田 将信 廣田 真史

出版者

一般社団法人 日本機械学会

雑誌

年次大会

巻号頁・発行日

vol.2015, pp._J0530302--_J0530302-, 2015

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The aim of this study is to design and propose the building model integrated with solar panel and wind turbine for the purpose of realizing the smart city. The number and angle of tilt of solar panel installed on the roof of the building are investigated considering the effect of shadow for some cities in Japan. The power generation characteristics of solar panel installed on not only the roof but also the wall of the building are also investigated assuming the building model to be installed in Tsu city. In addition, the power generation performances of the photovoltaic as well as the combined power generation of photovoltaic and wind turbine which are integrated with the buildings are compared with the power demand of the buildings. To estimate the power generation characteristics of the proposed model, the statistical meteorological data base is used. As a result, the optimum angle of tilt is 0 degree irrespective of investigated cities since the number of solar panel is the largest. Though the power energy generated by solar panel installed on the roof covers the most part of energy demand of the building, the addition of solar panel installed on the wall is effective to cover the energy demand through the year. The combined power generation of photovoltaic and wind turbine is effective when these power generation systems perform complementing the weakness of each system, e.g., the wind turbine covers the energy demand in night.

著者

西村 顕 柿田 将信 北川 諭 村田 淳介 安藤 俊剛 鎌田 泰成 廣田 真史

出版者

一般社団法人 日本機械学会

雑誌

年次大会

巻号頁・発行日

vol.2015, pp._J0530301--_J0530301-, 2015

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The aim of this study is to design and propose the size and layout of buildings which provide the better wind speed distribution for the higher power generation of wind turbine. A building model whose layout is like nozzle is proposed to obtain the acceleration of wind blowing through buildings due to contracted flow between buildings. In addition, the effect of the angle between two buildings on the power generation performance of the proposed building model is also investigated. For the feasibility check of installing the building model in some cities actually, the power energy output of wind turbine is investigated by considering the meteorological data such as wind speed and direction distribution for Fukushima city and Tsu city as an example. As a result, the proposed building models which have the angle between two buildings like nozzle of 90, 135 and 180 degree can provide the wind acceleration at the back of buildings for the wind blowing from the main wind direction and the angle of 135 degree is found to be the optimum building layout. In the case of installing the proposed building model in Fukushima city and Tsu city, the wind power energy output in winter is higher while that in summer is lower irrespective of the buildings angle. The interaction between the change in frequency distribution of wind speed direction through the year and the location of open tip of building model decides the power generation characteristics of the proposed building model.