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高橋 正旭, 岩村 拓哉, 竹下 惠一朗, 高橋 賢羽, 斉藤 純夫
会議録・要旨集
フリー
In recent years, public concern about environmental affair is growing at the same time, wind power generation systems have been common, it is required to improve the efficiency of wind turbine blades, leading to its operational stability and high efficiency. In this study, it is examined if the blade surface roughness affects the flow condition around the wind turbine blades to control the blade performance. Specifically, the flow velocity around blades are measured by using the hot-wire anemometer, so as to identify the flow behavior on the blade surface and behind the blades. As a result, flow separation is decreased because of contain roughness on the blade, and it is clarified that flow behavior on the blade surface and behind the blades is changed due to the blade surface roughness.
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室川 剛広, 為我井 芳郎, 三宅 大, 合田 良政, 三原 史規, 大嶋 隆夫, 竹下 恵美子, 齋藤 幸夫
ジャーナル
フリー
症例は75歳女性。便潜血陽性にて近医受診。下部消化管内視鏡検査(以下,CS)にてS状結腸に隆起性病変を認め,当院紹介受診。CSではS状結腸に,頂部に陥凹を有する約10mm大のⅡa+Ⅱc病変を認めた。拡大観察にて陥凹面に絨毛様構造を認め,生検では高分化型腺癌であった。粘膜下層浸潤癌と診断し,S状結腸切除術を施行。病理では腫瘍は12mm大で,粘膜下腫瘍様の形態を示し,一部で固有筋層まで浸潤を認めた。
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丹澤 祥晃, 竹下 恵介, 天野 嘉春, 橋詰 匠
日本機械学会論文集 B編
2002年
68 巻
671 号
2122-2127
発行日: 2002/07/25
公開日: 2008/03/28
ジャーナル
フリー
Dynamic behavior of a directory combined binary turbine system using a mixture of R 134 a and R 123 is investigated experimentally and theoretically. Our previous binary turbine system, which employs steam as the primary working fluid, used R 11 as the secondary working fluid because R 11 has good characteristics as a working fluid in power plants. However, substitute LBMs (Low Boiling temperature Medium) are being developed because of the ozone layer depletion by CFCs (Chloro Fluoro-Carbons). We investigated the system using R 123 in the second stage. Because R 123 is also controlled, in this paper, the steady state characteristics and dynamic behavior of the system using a mixture of R 134 a and R 123 are investigated taking into account the mole fraction of the mixture. In addition to the investigation using the experimental system, the following are clarified using our model : In the steady-state characteristics, there are remarkable differences in pressure based on the thermodynamic properties and in the load allotment of the two turbines. However, in the dynamic characteristics, the effect of the mole fraction could hardly be observed on the response characteristics of the rotating components to the load change.
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渡邊 良平, 片田 夏也, 永岡 康志, 中村 陽一, 高林 一浩, 長尾 さやか, 竹下 惠美子, 榎本 俊行, 斉田 芳久, 草地 信也, 北川 智之, 前谷 容
ジャーナル
フリー
Laparoscopy and endoscopy cooperative surgery (LECS) is widely accepted in Japan for submucosal tumor (SMT) of the gastric cardia and fornix. We modified LECS for SMT of the gastric cardia and fornix by placing supporting sutures at the edge of the remnant gastric wall, making it easier to grasp the remnant gastric wall for the SMT in the cardia. To prevent stenosis because of excessive resection of the esophagogastric junction (EGJ) , we did not perform endoscopic submucosal dissection (ESD) adjacent to EGJ. For the SMT in the gastric fornix, two or three short gastric vessels were divided, and the gastric wall was pulled caudally. These procedures provided a good view of the tumor and adequate tension for ESD.
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原田 治, 大出 華子, 岩淵 知, 佐藤 浩一, 町田 清朗
日本小児外科学会雑誌
1996年
32 巻
6 号
968-
発行日: 1996/10/20
公開日: 2017/01/01
ジャーナル
フリー
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長谷川 傑, 須貝 道博, 清藤 大, 豊水 嘉一, 鈴木 純, 小野 哲太郎, 渡辺 伸和, 今 充
日本小児外科学会雑誌
1996年
32 巻
6 号
968-
発行日: 1996/10/20
公開日: 2017/01/01
ジャーナル
フリー
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田村 広美, 萱場 広之, 藤原 慶之
日本小児外科学会雑誌
1996年
32 巻
6 号
968-
発行日: 1996/10/20
公開日: 2017/01/01
ジャーナル
フリー
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佐藤 智行, 竹下 恵美子, 森田 由羽子, 本吉 直孝, 川本 俊輔, 木村 正樹, 国府田 博之, 村上 穆
日本小児外科学会雑誌
1996年
32 巻
6 号
968-
発行日: 1996/10/20
公開日: 2017/01/01
ジャーナル
フリー
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恩田 直樹, 竹下 恵介, 天野 嘉春, 橋詰 匠, 武居 俊孝
会議録・要旨集
フリー
Performance of rectifying column affects the coefficient of performance (COP) in an ammonia absorption refrigerator (AAR). Refrigerant mass fraction is one of the key parameters to discuss the performance of the rectifying column. Focusing on the refrigerant mass fraction, this paper presents a method to estimate the refrigerant mass fraction with mass and energy balance and the result of the experiment which measures refrigerant mass fraction by sampling from the refrigerant receiver. Through out these investigations, the refrigerant mass fraction became lower than the expected value which is calculated from the condition of saturated vapor at the top of the rectifying column. We confirm that the refrigerant mass fraction could be estimated with sufficient accuracy from mass and energy balance equations around the separator at the inlet of the evaporator.
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竹下 恵介, 釣 啓介, 冨澤 昌雄, 天野 嘉春, 橋詰 匠
山梨講演会講演論文集
2000年
2000 巻
608
発行日: 2000/10/03
公開日: 2017/06/19
会議録・要旨集
フリー
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竹下 恵介, 天野 嘉春, 橋詰 匠
熱工学講演会講演論文集
2002年
2002 巻
発行日: 2002/11/06
公開日: 2017/08/01
会議録・要旨集
フリー
In this paper, authors propose a hybrid power and refrigeration system which employs ammonia-water mixture (AWM) as the working fluid. The hybrid system is composed of an AWM turbine system and an ammonia absorption refrigerator. The AWM turbine system is a power cycle which is similar to a Kalina cycle. The ammonia absorption refrigerator is a single-stage absorption chiller. The results of the simulations show that the hybrid system generates larger output power than that of separate configuration of the AWM turbine system and the ammonia absorption refrigerator under the condition of the same refrigerating capacity.
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竹下 恵介, 高田 潤, 石山 雄一, 天野 嘉春, 橋詰 匠
会議録・要旨集
フリー
Advanced co-generation systems which is composed of a gas turbine, a steam turbine, an ammonia absorption refrigerator, an ammonia-water mixture turbine and an ice storage tank is installed at Waseda university. In this paper, a valuation of this system is discussed. To evaluate the effectiveness of the ACGS, the ACGS and a system supplied same electric power by conventional thermal power plant are investigated from economic, environmental, and energy viewpoints.
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柳澤 善行, 野谷 将弘, 櫻井 博儀, 下浦 享, 岩崎 宏典, 道正 信一郎, 上浩二, 黒川 明子, 岩佐 直仁, 国府 誠, 馬場 秀忠, 五味 朋子, 斎藤 明登, 峯村 俊行, 松山 裕一, 日暮 祥英, 菅野 祥子, 世良田 真来, 竹下 恵里, 武内 聡, 山田 一成, 出道 仁彦, 長谷川 浩一, 秋吉啓光, 福田 直樹, 米田 健一郎, 青井 考, 今井 伸明, 杉本 崇, 中村 隆司, 本林 透
日本物理学会講演概要集
2002年
57.1.1 巻
発行日: 2002/03/01
公開日: 2018/03/04
会議録・要旨集
フリー
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小沢 顕, 山口 貴之, Zheng T, Kanugo R, 須田 利美, 吉田 光一, 谷畑 勇夫, 山口 由高, 鈴木 健, 泉川 卓司, 加藤 智美, 百田 佐多, 木村 喜久男
日本物理学会講演概要集
2002年
57.1.1 巻
発行日: 2002/03/01
公開日: 2018/03/04
会議録・要旨集
フリー
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田嶋 直樹, 清水 良文
日本物理学会講演概要集
2002年
57.1.1 巻
発行日: 2002/03/01
公開日: 2018/03/04
会議録・要旨集
フリー
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明 孝之, 青山 茂義, 加藤 幾芳, 池田 清美
日本物理学会講演概要集
2002年
57.1.1 巻
発行日: 2002/03/01
公開日: 2018/03/04
会議録・要旨集
フリー
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川西 圭輔, 竹下 恵介, 天野 嘉春, 橋詰 匠
年次大会講演論文集
2004年
2004.3 巻
2412
発行日: 2004/09/04
公開日: 2017/08/01
会議録・要旨集
認証あり
In this paper, authors propose and investigate an Ammonia-Water Mixture (AWM) turbine system with ejector. The AWM turbine system is a power cycle which is similar to a Kalina cycle. The AWM turbine system without ejector has high pressure solution which is led to the condenser through the reducing valve without using potential of the pressure. For using the pressure difference effectively, a new cycle configuration which installs ejector is proposed. The results of simulations show that the turbine system with ejector generates larger output power than that without ejector under the same condition. And the simple configuration cycle can be expected to generate almost as much output as more complicated cycle by installation of ejector.
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冨澤 昌雄, 竹下 恵介, 石山 雄一, 天野 嘉春, 橋詰 匠
会議録・要旨集
フリー
The advanced co-generation system (ACGS) was built at Waseda University in 1999. The ACGS consists of a gas turbine, a steam turbine, an ammonia-water mixture turbine, an ammonia absorption refrigerator and an ice storage system. Three turbine systems have a cascade relation upon the utilization of energy. In addition, the ammonia-water mixture turbine and the ammonia absorption refrigerator are located in the bottoming stage of the ACGS to utilize the lower temperature steam. In this paper, a mathematical model of the bottoming stage of the ACGS is established according to the experimental date. And the batter mechanism of ice storage system is discussed from the view of optimal planning with component-lag.
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加藤 正治, 酒巻 拓朗, 竹下 恵介, 橋詰 匠, 米田 弘和, 藤間 克巳, 佐々木 道生
熱工学講演会講演論文集
2001年
2001 巻
OS-12I/D105
発行日: 2001/11/03
公開日: 2017/08/01
会議録・要旨集
フリー
This paper deals with a refrigeration system using CO_2 as the working fluid. The CO_2 refrigeration system has a cycle including trans-critical region at the high-pressure side due to its thermodynamic characteristics. This refrigeration system provides an advantage, when it is applied for both cooling and heating demand simultaneously in the temperature range from -30℃ to 80℃. Taking into account of operational data of a 40USRT CO_2 refrigeration system, which is installed at Waseda University, the effectiveness of the CO_2 refrigeration system applying to both cooling and heating demand at the same time in industries is discussed.
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冨澤 昌雄, 竹下 恵介, 天野 嘉春, 橋詰 匠, 秋葉 雅史
会議録・要旨集
フリー
The advanced co-generation system (ACGS) was built at Waseda University in 1999. The ACGS consists of a gas turbine, a steam turbine, an ammonia-water mixture turbine, an ammonia absorption refrigerator and an ice storage system. These turbine systems have a cascade relation upon the utilization of energy. Meanwhile, the ammonia-water mixture turbine and the ammonia absorption refrigerator are located in the bottoming stage of the ACGS to utilize the lower temperature steam. In this paper, a mathematical model of the bottoming stage of the ACGS is established according to the experimental data. And the optimal operational planning of the bottoming stage with three case of the cooling demand during the nighttime is also discussed.
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