連続式空気揚水筒の水循環性能に関する評価研究:-揚水流量と鉛直水温分布の実地調査-

概要

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In this study a new type of air lifting tower was assessed. This type was first installed in a reservoir in 2009 and employs diffusers continuously emitting air. It is expected that its configuration will provide several competitive advantages over the conventional intermittent type. Field tests were conducted at the reservoir to assess its water circulation performance. The water flow velocity was measured near the reservoir surface above the tower in winter and the flow rate of the lifted water was determined. The measured flow rate was compared with that predicted numerically. In the following summer, the temperature distribution in the reservoir water was measured with three new identical towers operating and compared with data obtained when six conventional towers were operating. The flow rate of the water lifted using the new tower was found to exceed the predicted value by approximately 30%, and the temperature difference between the reservoir surface and the bottom was less than or equal to 10°C in August, which is lower than that achieved using conventional towers. Moreover, the power consumption of the three new towers was less than 50% of that of the six conventional towers.
日本実験力学会の論文