热管在大体积混凝土结构温度控制中的应用研究  

Research on the application of thermosyphon in temperature control of large concrete structures

作　　者：徐剑锋[1] 洪荣华[1] 孙志坚[1] 吴存真[1] 

机构地区：[1]浙江大学机械与能源工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2003年第5期591-595,共5页Journal of Zhejiang University：Engineering Science

摘　　要：在数值计算的基础上,探索了一种很有希望的、新型的对大体积混凝土结构进行温度控制的方法,即应用热管将大体积混凝土结构中产生的水化热传递出去,有效地控制了由于水化热引起的混凝土内部的温度梯度,使其达到规范的要求,避免产生裂缝,以满足强度的需要.而且可以通过对热管间距及热管运行温度的控制以适应不同实际情况的需要;与常规的混凝土养护方法相比,能较大地节约能源与投资.经实验证实,该方法理论模型及计算结果与试验结果吻合良好.An analysis of the temperature distribution and heat transfer in large concrete structures in the presence of two-phase closed thermosyphons is presented to extract the heat of hydration of cement paste. The result of the analysis and experiment show that the temperature rise in the concrete during the early stages of curing under various conditions can be effectively controlled by reducing the distance between the thermosyphons and changing their operating temperature. Controlling the temperature gradients will protect massive concrete structures from thermal cracks and result in high strength and low permeability.

关 键 词：大体积混凝土结构 温度控制 热管 水化热 温度梯度 温度裂缝 

分 类 号：TU755[建筑科学—建筑技术科学] TK172.4[动力工程及工程热物理—热能工程]