Noise-Assisted thermoacoustic refrigerator by utilizing amplification and simplification effect of multi-frequency sound in thermoacoustic field

2016 Fiscal Year Final Research Report

• Project/Area Number: 26820418
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Energy engineering
• Research Institution: National Institute of Technology, Toyama College
• Principal Investigator: Kyoden Tomoaki 富山高等専門学校, 商船学科, 准教授 (50579729)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 熱音響 / 冷却システム / 騒音利用

Outline of Final Research Achievements

The object of this paper is to present thermoacoustic conversion device applied for noise energy generated. The noise is composed by multi-frequency sound waves and low energy density. Therefore, we demonstrated the selective amplification of acoustic power by utilizing thermoacoustic effect. The stacked mesh-screens with steep temperature gradient were installed in the one-third length of pipe. It was found that sound at third harmonic-frequency was amplified by thermoacoustic effect, and the sounds at other frequency were attenuated by viscosity dissipation in the stack. Summarizing these results, the performance of proposed selective amplification was clarified in relation to acoustic intensity.
And then, to study the improvement of performance in a looped-tube-type thermoacoustic cooler with branch resonator by additional bypass-looped tube with stack as the double loop-tube-type thermoacoustic cooler.

Free Research Field

エネルギー変換工学