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本文对机械振动强化吸收式制冷传热传质进行实验研究。搭建了一套综合的性能研究实验台,在吸收式制冷机的底部安装了一个电动振动机,使机组在垂直方向上产生振动,分别对振动频率和振幅两个因素对机组性能强化的效果进行实验分析,得出结论:振幅相同时,振动频率对强化效果的影响较大;而在最佳喷淋量下,频率相同时,振幅太大或太小,振动的强化效果都会下降。且在实验范围内,得到最佳强化效果的频率段为20~30 Hz,此时传热的强化效果可达到8%~20%,传质的强化效果可达到10%~25%,制冷量可提高12%~18%。
In this paper, mechanical vibration enhanced absorption heat transfer and mass transfer experiments. A set of comprehensive performance research bench was set up. An electric vibrator was installed on the bottom of the absorption chiller to make the unit vibrate in the vertical direction. The effects of vibration frequency and amplitude on the performance of the unit were enhanced respectively The experimental results show that when the amplitude is the same, the vibration frequency has a great influence on the strengthening effect. When the frequency is the same, the amplitude is too large or too small, the vibration strengthening effect will decrease. And in the experimental range, the frequency band with the best enhancement effect is 20 ~ 30 Hz, the heat transfer enhancement effect can reach 8% ~ 20%, the mass transfer enhancement effect can reach 10% ~ 25%, the cooling capacity Can increase 12% ~ 18%.