Thermal Analysis of Shell-and-Tube Thermoacoustic Heat Exchangers

Entropy

Kaveh Ghorbanian¹  Mohammad Gholamrezaei¹ 

[1] Department of Aerospace Engineering, Sharif University of Technology, Tehran 11365-8639, Iran;

关键词: heat exchangers;    thermoacoustics;    shell-and-tube;    acoustic energy;    dissipation;   

DOI  :  10.3390/e18080301

来源: DOAJ

【 摘 要 】

Heat exchangers are of key importance in overall performance and commercialization of thermoacoustic devices. The main goal in designing efficient thermoacoustic heat exchangers (TAHXs) is the achievement of the required heat transfer rate in conjunction with low acoustic energy dissipation. A numerical investigation is performed to examine the effects of geometry on both the viscous and thermal-relaxation losses of shell-and-tube TAHXs. Further, the impact of the drive ratio as well as the temperature difference between the oscillating gas and the TAHX tube wall on acoustic energy dissipation are explored. While viscous losses decrease withd i/δ κ , thermal-relaxation losses increase; however, thermal relaxation effects mainly determine the acoustic power dissipated in TAHXs. The results indicate the existence of an optimal configuration for which the acoustic energy dissipation minimizes depending on both the TAHX metal temperature and the drive ratio.

【 授权许可】

Unknown