降低空调能耗将有效缓解我国夏季电力供应矛盾，太阳能空调技术的应用则是最有降低空调能耗潜力的方向之一。太阳能风冷双效溴化锂吸收式空调是一种高效利用太阳能进行制冷的装置。因为它利用太阳能作驱动能源，又采用空气对吸收器和冷凝器进行冷却，所以太阳辐射与环境温度的复合影响就成为影响系统运行特性、及造成系统在极端工况下失效的关键因素。本项目着重研究太阳辐射与环境温度复合影响下太阳能风冷双效溴化锂吸收式空调的失效机理，建立描述耦合各组件流动、传热过程等的系统工作过程模型，分析失效工况下溴化锂溶液结晶点的生成、迁移、消亡、再生等特性，及导致系统性能显著衰减的关键因素，搭建太阳能空调工作特性测试平台进行实验研究。通过研究结果的分析总结，揭示太阳辐射与环境温度复合影响下太阳能风冷双效溴化锂吸收式空调的失效机理。本项目的研究成果为系统高效设计奠定基础理论，对我国太阳能制冷工程的实施起积极推动作用。

The reduce energy consumption of air conditioner can effectively decrease the summer power supply, and the application of solar air conditioner is one of the way that have most potential to reduce energy consumption of air conditioner. Solar air-cooled double effect LiBr-H2O absorption chiller (SADELAC) is the equipment which efficiently uses solar for refrigeration. Because SADELAC is driven by solar, its absorber and condenser are cooled by air as well. Therefore, the compound influence of solar radiation and environment temperature can lead to the significantly decline even failure of system performance. The failure mechanism of SADELAC under compound influence of solar radiation and environment temperature is mainly studied in this project. A working process model coupled with flow and heat transfer process of each component is developed. The occurrence, transfer, disappearance and regeneration for crystallization position of LiBr-H2O as well as the key factor that makes the system performance decrease significantly are analyzed. Furthermore, the operation characteristic test system of SADELAC is set up and the experimental study is carried out. The failure mechanism of SADELAC under the compound influence of solar radiation and environment temperature is revealed by analysis of research results. The achievement of this project can establish the fundamental theory of system high efficiency design, and provide an active promoting role in implementation of solar refrigeration engineering as well.