文档介绍：添加纳米微粒的溴化锂溶液稳定性和烧结特性的试验研究∗

解国珍,张新兴, 王刚

(北京建筑工程学院,北京 100044)

摘要众所周知,在溴化锂溶液中添加纳米微粒可以有效地提高其传热和传质特性,但是添加纳米材料
的溶液的稳定性是很重要的一环。本文在原有的制备流程基础上,针对 58%溴化锂溶液,通过重力沉降试
验研究了制备添加纳米微粒的溴化锂溶液的流程,完善了原有的制备流程,得出了制备溴化锂纳米溶液更
加合理的流程,得到纳米微粒和分散剂的稳定性试验结果。由于实际运行的溴化锂吸收式制冷机中溶液的
温度会在 40℃到 150℃间不断变化。因此,研究温度对于分散体系的稳定性的影响和烧结特性是十分必要
的。含有分散剂的纳米流体易发生烧结,而烧结使得分散体系的稳定性发生变化,也使得换热效果恶化。
通过研究添加于溴化锂溶液中的分散剂组分组分数、纳米微粒组分组分数以及烧结温度和烧结时间对于烧
结现象的影响,并应用相关理论进行了解释,并提出改进的建议。
关键词溴化锂水溶液纳米微粒稳定性烧结

EXPERIMENTAL INVESTIGATION ON STABILITY AND SINTERING
PROPERTY OF LIBR/WATER SOLUTION ADDING NANO-PARTICLES

Xie Guozhen, Zhang Xinxing, Wang Gang
(Beijing University of Civil Engineering and Architecture,Beijing 100044)

Abstract It is known that the property, such as mass and transfer, of anic salt solution could be improved
by adding proper nano-particles into the solution. However, it is important to put some relevant dispersants into
the solution to keep the stability and homogenous of the solution. This paper study on the stability of LiBr/water
solution and the sintering property of some dispersants that were added into the solution by experiment. Normally,
LiBr/water solution working in an absorption refrigeration chiller would undergo a range of temperature from
40℃ to 150℃. The LiBr/water solution mixes with some nano-particles and dispersant harmoniously and
shows tremendous perf