描述单效蒸发器的方程，用下述方法推导。
The equations describing a single-effect evaporator are developed in the following manner.
由于单效溴化锂吸收制冷循环受太阳能热源温度较低的限制，需要采用适当的辅助手段。
The limitation of the single-effect LiBr absorption chilling circle driven by the low temperature solar energy heat source require adopting auxiliary means for proper operation.
分析了燕化化工一厂目前的供冷方式及存在的问题，对单效型溴冷机的技术参数、年运行费用等进行了全面的分析比较。
In this paper, the way of providing cold energy and the existing Problem were discussed, the specification and annual operation cost of the single-action on liBr-Refrigeratory were thoroughly studied.
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