著者

本間 宏也

出版者

THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

雑誌

日本ゴム協会誌 (ISSN:0029022X)

巻号頁・発行日

vol.86, no.12, pp.373-377, 2013 (Released:2014-02-06)

参考文献数

15

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Polymeric materials have the advantage of light weight, ease of manufacturing and feasibility for various shapes, compared with porcelain one. Application of the polymeric materials to outdoor electrical insulating apparatuses has achieved to reduce the size, weight of the equipments, and maintenance cost of the electrical power lines. Especially, silicone rubber can show good weatherability and hydrophobicity, so that it has been widely applied to polymeric insulators for outdoor use. Polymeric insulators are gaining market share as a result of improved tolerance to pollution, ease of handling and installation. In this article, the state of research and development of the polymeric insulators and their application for the electrical power lines are provided.

著者

本間 宏 焼山 誠

出版者

一般社団法人 日本建築学会

雑誌

日本建築学会計画系論文報告集 (ISSN:09108017)

巻号頁・発行日

vol.375, pp.39-48, 1987-05-30 (Released:2017-12-25)

被引用文献数

1 1

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About 35 % of heat generated by a human body is dissipated by convection in a normal room condition. This convective heat dissipation causes upward air stream around the body. The characteristics of free convection around human bodies were surveyed through infrared thermograms, smoke wire photographs and hot wire anemometry in this study. Male students of a normal height and weight were chosen for the experimental objectives. Experiments were carried out under standing and seated postures, and also under naked and clothed conditions. A heated rectangular model of a height of 1.6 m and a total surface of 1.6 m^2 was also included in the objectives. The results of the three methods indicated that stable free convection existed already at the ankle level. Laminar air flow enclosed the lower parts of the subjects to the height of the thighs. The range of peak air velocities was 5 to 15 cm/s in this part. The range of boundary layer thicknesses was 1 to 3 cm here. The upper parts of the subjects were enclosed by the turbulent flow, the average air velocity of which was about 20 cm/s, and the boundary layer thicknesses of which ranged between 5 and 10 cm. The measured velocities of the clothed condition concentrated in the slower part, and the measured velocities of the naked condition concentrated in the faster part of each of the ranges. The velocity of the free convection corresponds to the allowable maximum air movement for comfort in an air conditioned room.

著者

伊藤 芳之 本間 宏

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. D-2, 環境工学II, 熱, 湿気, 温熱感, 自然エネルギー, 気流・換気・排煙, 数値流体, 空気清浄, 暖冷房・空調, 熱源設備, 設備応用 (ISSN:1341450X)

巻号頁・発行日

vol.2003, pp.743-744, 2003-07-30

著者

本間 宏

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. D-2, 環境工学II, 熱, 湿気, 温熱感, 自然エネルギー, 気流・換気・排煙, 数値流体, 空気清浄, 暖冷房・空調, 熱源設備, 設備応用 (ISSN:1341450X)

巻号頁・発行日

vol.2000, pp.415-416, 2000-07-31