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Experiemental study of heat and mass trasnfer enhancement of absorption refrigeration by mechanical vibration.

[In Chinese. / En chinois.]

Author(s) : SHEN J., ZOU G., WANG J., et al.

Type of article: Article

Summary

Effects of mechanical vibration on the heat and mass transfer process of absorption refrigerating system had been researched in this paper. A performance appraisal test bench was set up, thus an electrodynamics vibration generator was installed on the bottom of the absorption refrigerating machine to add vertical vibration into the system. Enhancement effects of vibration frequencies and amplitude on the heat and mass transfer process of absorption refrigerating machine were analysed respectively. The results showed that when amplitude was constant, vibration frequencies had a strong effect on enhancement effect; and under the optimum spray volume and same vibration frequency, the enhancement effect of vibration would be reduced with too high or too low vibration amplitude. And in the range of test, frequency ranges for the best enhancement effect was 20 -30 Hz, in these conditions, the enhancement effect of heat transfer could be 8% -20%, the enhancement effect of mass transfer could be 10% -25%, and cooling capacity increased by 12 % -18 %.

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Pages: 46-52

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