严寒地区太阳能热利用系统防冻实验研究
Experimental study on anti-freezing of solar heating system in severe cold zone
摘要：
以哈尔滨地区为例，建立了太阳能系统实验台，针对太阳能热利用系统中存在的防冻问题提出了新的防冻运行模式和控制策略。该防冻模式采用集热器内高温液体作为防冻热源向管路提供热量，测试了不同室外条件以及不同运行模式下，室外管道内液体温度的变化。实验结果表明，防冻模式下室外环路内防冻液温度可高于外界环境温度15 ℃以上，所采用的防冻液体积分数可由50%降低到30%。该防冻策略比传统的防冻措施更可靠、安全，经济性更优。
Abstract：
Establishes an experiment platform to research the anti-freezing operating modes and control strategies of the solar energy utilization system in Harbin. The thermal energy in solar collectors is used as the energy resource to prevent freezing in this system. Under different outdoor conditions and operating modes, tests the temperature variation of the fluid in outdoor pipe. The results suggest that it can keep the temperature 15℃ higher than that of the environment, and further the volume fraction of antifreeze can be reduced from 50% to 30%. In addition, this anti-freezing strategy is more reliable, safer and more economical than the traditional anti-freezing measures.
Keywords:solar energy, anti-freezing, solar collecting system, severe cold zone, economical efficiency