太阳能溴化锂吸收式制冷系统溶液降膜吸收流动分析

Analysis of falling film absorption flow of solar LiBr absorption system

溴化锂降膜式吸收器能在较小液流量和较小温差下获得较高的热流密度和传热传质系数,尤其是当液膜沿着水平管外作降膜流动时,传热传质效果更佳。为此建立溴化锂降膜吸收器溶液吸收过程流动的物理模型,通过对模型假设简化,对其进行数值求解,从而进行流动分析。与实验结果分析相结合,使得对吸收式制冷系统的分析更加全面。

The lithium bromide falling film generator can raise its heat and mass transfer coefficients, when the heat flux and temperature difference are low, especially when the solution flowing down the out side tube,the effect of the absorber is better. Establishes the physical model of film flow process. By means of supposing and simplifying, solves the model by the computer, and analyzes the film flow. With the experimental results, analyzes the lithium bromide absorption refrigeration system more comprehensibly.