摘要
为将低品位可再生能源直接应用于采暖系统,提出了一种以碳钢/水重力式热管为加热管的低温辐射地板采暖方式,分析了其传热特性并对热工性能进行了实验研究。在不同供水温度(35～45℃)、供水流量(0.12～0.37m3/h)以及地板表面初始温度(26～30℃)下,分别得到了地板表面及热管壁面的温度分布、地板散热量和传热滞后时间等参数。实验结果表明:热管辐射地板可以在较低的供水温度下达到较高的散热量,供水温度可比常规塑料埋管地板降低5℃左右;地板升温快、蓄热好,升温期时间约为降温期时间的1/3;地板表面温度梯度合理,有利于减小热损失。根据实验结果拟合了低温热管辐射地板的散热量计算公式。
In order to apply low-quality renewable energy to heating system, a low-temperature thermosyphon radiant floor heating mode with carbon steel/water thermosyphon as heat pipe is proposed. The heat transfer characteristics of the thermosyphon radiant floor are analyzed, and the experimental re- search on its thermodynamic performance is carried out. Some parameters, such as temperature distribu- tion on floor surface and heat pipe wall, the radiating heat from floor and heat transfer lag time are obtained at different water supply temperatures （35 to 45 ℃ ）, water supply rates （0.12 to 0. 37 m3/h） and initial temperatures of floor surface （26 to 30 ℃ ）. The results show that the thermosyphon radiant floor can reach a higher radiating heat at lower water supply temperature, and the water supply temperature of the thermosyphon radiant floor is 5 ℃ less than that of conventional plastic pipe floor. The thermosyphon radiant floor has rapid temperature rise and good heat storage, and the temperature rise time is one third of the temperature drop time. The floor surface temperature gradient is rational, which helps to reduce heat loss. The calculation formula of the radiating heat from low-temperature thermosyphon radiant floor is fit based on the experimental result.
出处
《煤气与热力》
2011年第7期26-30,共5页
Gas & Heat
关键词
碳钢/水重力式热管
低温热管
辐射地板
采暖
热工性能
carbon steel/water thermosyphon
low-temperature thermosyphon
radiant floor
heating
thermodynamic performance
