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Study on a novel looped heat-driven thermoacoustic refrigerator with direct-coupling configuration for room temperature cooling.

Author(s) : WANG H., ZHANG L., HU J., YU G., WU Z., DAI W., LUO E.

Type of article: IJR article

Summary

In this paper, a novel looped heat-driven thermoacoustic refrigerator with direct-coupling configuration is proposed to realize high coefficient of performance and high specific power for room temperature cooling. The novel system comprises three identical thermoacoustic engine-refrigerator units with direct coupling configuration, connected end-to-end by resonance tubes to form a closed loop. Detailed simulation and analysis about the internal operating mechanism is presented firstly. The theoretical results indicate the optimum entrance acoustic phase between pressure and velocity waves for the thermoacoustic engine and the thermoacoustic refrigerator operating in room temperature range are lagging and leading, respectively. In addition, the optimum heating temperature is 300 °C for the direct-coupling looped heat-driven thermoacoustic refrigerator with a cooling temperature of 10 °C and an ambient temperature of 50 °C. Upon extensive calculations and analysis, an experimental setup was designed and built for achieving 3–5 kW, which is aiming at for a waste heat driven air-conditioning application of heavy trucks. The experimental system can be thermally self-excited operation with a resonance frequency of about 56 Hz and an onset temperature of about 80 °C. The total cooling capacity of 4.0 kW with a coefficient of performance of 0.28 is obtained under the heating temperature of 300 °C and the cooling temperature of 10 °C. Compared with previously reported heat-driven thermoacoustic refrigerators, this work exhibits a substantial improvement in cooling efficiency and cooling capacity, showing good prospects for medium-temperature heat-driven refrigeration applications.

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Pages: 180-188

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Details

  • Original title: Study on a novel looped heat-driven thermoacoustic refrigerator with direct-coupling configuration for room temperature cooling.
  • Record ID : 30028163
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 123
  • Publication date: 2021/03
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.11.019
  • Document available for consultation in the library of the IIR headquarters only.

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