Study of Thermo-acoustic Engine to utilize cold energy of LNG

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Other Title
  • 熱音響エンジンのLNG冷熱有効利用への応用

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This study focuses on a thermo-acoustic engine which utilizes cold energy of LNG. The authors developed an experimental engine driven with liquified N2, which successfully generated acoustic power more than 100W. The objective of this study is to find an application of thermo-acoustic engine combined with conventional propane cycle for LNG power generation. Because thermo-acoustic engine performs better in cryogenic temperature range, it is suggested to allocate thermo-acoustic engines prior to the propane cycle. An optimization was employed to design thermo-acoustic engine for various cold side temperature of the regenerator. The results of the cycle simulation showed that the temperature of -120 degC would be the best setting to maximize the total power generation of both the thermo-acoustic engines and the propane cycle, which increases the output by 15%.

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