Recycle Effect on Device Performance of Wire Mesh Packed Double-Pass Solar Air Heaters

Energies

Chii-Dong Ho¹  Chun-Sheng Lin²  Tz-Jin Yang²  Chun-Chieh Chao² 

[1] Department of Chemical and Materials Engineering, Tamkang University, 151 Yingzhuan Road, Tamsui District, New Taipei 251, Taiwan;

关键词: wire mesh;    recycle;    heat transfer efficiency;    double-pass;    solar air heater;   

DOI  :  10.3390/en7117568

来源: mdpi

【 摘 要 】

A new device for inserting an absorber plate to divide a flat-plate channel into two subchannels to conduct double-pass wire mesh packed operations was developed. The proposed wire mesh packed device improves the heat transfer efficiency substantially as compared that to flat-plate single-pass and double-pass operations using the same working dimensions, and the improvement of device performance was investigated experimentally and theoretically. Good agreement between the theoretical prediction and the measured values from the experimental results was achieved. Considerable heat transfer improvement was obtained employing wire mesh packed double-pass operations under the absorber plate with external recycle. The influences of recycle ratio on the heat transfer efficiency and the power consumption increase were also discussed.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.