日本機械学会論文集B編
Online ISSN : 1884-8346
技術論文
湿潤材料の温度測定による高温用広域湿度センサの開発(循環水量の影響をふまえた測定精度の向上)
北原 貴志伊與田 浩志井上 保
著者情報
ジャーナル フリー

78 巻 (2012) 787 号 p. 686-696

詳細
PDFをダウンロード (532K) 発行機関連絡先
抄録

A high-temperature wide-range humidity sensor has been developed using wetted material temperature measurement. A porous ceramic is used as a sensing element; it has a small tube for supplying water to maintain a wetted surface. However, the water supplied to the elements can affect the surface temperature. In this study, we experimentally investigate the accuracy of the developed sensor and its contributing factors-convective heat transfer, evaporation, radiant heat, and the water supplied to the wetted material-under the conditions of a gas flow temperature of 200 °C, gas flow velocity of 3 or 5 m/s, flow rate of supplied water of 0.01-0.05 g/s, and steam mole fraction of 0.03-1.00. Further, we calculate the heat flux and the surface temperature using a one-dimensional heat transfer model to clarify the effects of the each of the abovementioned factors. Consequently, we conclude that the supplied water strongly affects the accuracy of the developed sensor. We also improve the measurement error of the steam mole fraction from 0.07 to 0.03 by the controlling the flow rate of the supplied water.

著者関連情報
© 2012 一般社団法人 日本機械学会
前の記事 次の記事
feedback
Top