太阳能中温集热利用制蒸汽系统性能研究

Performances of a Steam Generation System by the Heat Utilization of Mesothermal Solar

中文关键词: 太阳能热利用  低压蒸汽  热力学模型  集热温度

英文关键词: solar thermal application  low-pressure steam  thermodynamic model  collecting temperature

中文摘要:

      构建了一套供热功率为310 kW的太阳能中温集热利用制蒸汽系统，建立了系统主要模块——太阳能集热器与热変换器的热力学模型，研究了变工况下太阳辐射强度、凝水回收比、环境温度对系统效率和供热功率的影响，探讨了不同运行参数条件下集热温度与系统性能之间的关系。研究结果表明，增大辐射强度对系统性能提升显著；回收凝水对系统效率的影响不大，但对制热功率的提升较为明显；系统性能随环境温度升高呈先上升后下降的趋势；系统存在最佳集热温度，最佳集热温度随辐射强度和环境温度的增大而升高。

英文摘要:

      A 310kW steam generation system by the heat utilization of mesothermal solar was built and the thermodynamic model of solar collector and heat transformer were developed. Under different conditions, the impact of solar radiation intensity, recycle ratio of condensate water and the ambient temperature on thermal efficiency and heating power was investigated and the relationship of collecting temperature and system performance was discussed. The result shows that the system performance enhanced significantly with the rise of solar radiation intensity. Recycling condensate water could escalate heating power but having little effect on thermal efficiency. The system performance enhances first and then drops with the rise of ambient temperature. The system has the optimum collecting temperature which increases with the rise of solar radiation intensity and ambient temperature.