文档介绍：旋转磁场下纳米磁流体强化氨水鼓泡吸收的实验研究
李增扬武卫东刘四美陈盛祥丁澎

(上海理工大学能源与动力学院制冷技术研究所, 上海 200093)

摘要:吸收式制冷系统的性能系数和吸收器内传热传质过程有很大的相关性,为了探讨旋转磁场下纳米
磁流体对氨水鼓泡吸收传热传质的影响,利用设计的试验系统进行了不同磁场强度下的纳米磁流体强化氨
水鼓泡吸收的实验。实验表明:旋转磁场和纳米磁流体对氨水鼓泡吸收都有强化作用。当磁场强度在
0~260mT 变化时,随磁场强度的增加,吸收率增大。纳米磁流体增强氨水鼓泡吸收的浓度有最优值,当纳
米磁流体浓度在 0~1wt%变化时,吸收率随纳米磁流体浓度的增加而增大,当纳米磁流体浓度在 1~2wt%变
化时,吸收率的增长速率变慢甚至略有下降。在磁场强度为 260mT,纳米磁流体浓度为 1%时,得到最大
有效吸收比,为。分别从旋转磁场和纳米流体对氨水溶液物性的影响和对气泡运动的影响等方面对
强化机理进行了探讨。
关键词:鼓泡吸收氨水纳米磁流体传热传质旋转磁场

EXPERIMENTAL STUDY ON AMMONIA-WATER BUBBLE ABSORPTION
UNDER ROTATING IC FIELD

Li Zengyang Wu Weidong Liu Simei Chen Shengxiang Ding Peng
(Institute of Refrigeration Technology, University of Shanghai for Science and Technology, Shanghai 200093)

Abstract Absorber is a ponent of absorption refrigeration system, in which there is plicated heat
and mass transfer. To improve the performance of absorber, the rotating ic field and ferrofluid was used as
a enhancing way, the experiments of NH3/H2O bubble absorption in rotating ic field were carried out. The
results showed that the NH3/H2O bubble absorption can be strengthened by the rotating ic field and
ferrofluid. Both absorption rate and effective absorption ratio increase with the increase of ic intensity
within the range of 0~260mT. There has the optimal concentration when using the ferrofluid. When the
concentration of ferrofluid is