A study for the effective use of low-temperature waste heat - Improvement in the efficiency of energy by applying the thermoacoustic phenomenon -

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We have investigated for energy efficiency with thermoacoustic phenomena for the effective utilization of low temperature waste heat. We suggested three approaches. The first is the approach of the sound field. The second is the approach for the stack. The third is the approach for the heat leak. In the first approach, we proposed phase adjuster, expanding phase adjuster, sub-loop, membrane, and etc. It was found that the energy efficiency is increased by close to traveling wave phase difference in the prime mover. In the second approach, we investigated the effect on efficiency for the installation position of the stack and the radius of the stack. We recognized the validity of omega tau of dimensionless parameters. In the third approach, we investigated the heat leak of prime mover. It was found that the heat leak is larger than expected from the results.