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-  2017 

基于热流管单元的混凝土通风冷却效果 Concrete cooling effect by air cooling based on heat-fluid pipe element

Keywords: 混凝土,通水冷却,通风冷却,热流耦合管

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Abstract:

我国当前通常采用内嵌水管通水冷却以降低混凝土温度,但在干旱地区或混凝土结构较高部分采用通水冷却施工较不方便,以空气作为冷却介质进行混凝土冷却能够较好地避免上述问题.相较于通水冷却,通风冷却施工设备较为简单,且由于空气密度较小,可采用竖直方向通风冷却.采用热流耦合单元,充分考虑风、水的沿程温度变化以及冷却管附近混凝土、远离冷却管混凝土不同的温度变化规律,进行通风冷却敏感性分析及通风冷却、通水冷却效果对比.仿真模拟结果表明:通风冷却能够较好地削减混凝土温度峰值;通风风速越快、通风温度越低、混凝土截面越小,通风冷却效果越好;选取适当的风速及通风温度,通风冷却能够达到与通水冷却近似的冷却效果

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