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Traveling wave thermoacoustic refrigeration with variable phase-coordinated boundary conditions
Jesse Callanan1, Revant Adlakha1, Mohamed Mousa1
1Department of Mechanical and Aerospace Engineering, University at Buffalo (SUNY), Buffalo, New York 14260-4400, USA.
The Journal of the Acoustical Society of America
|December 26, 2023
Summary
Researchers controlled thermoacoustic refrigeration by adjusting dual drivers. This advancement offers precise temperature control for devices in extreme environments and precision applications.
Area of Science:
- Thermodynamics
- Acoustics
- Materials Science
Background:
- Thermoacoustic refrigerators use gas-particle and porous-solid interactions to create cooling.
- Controlling the temperature gradient is key to precise refrigeration capability.
Purpose of the Study:
- To demonstrate precise control of thermoacoustic refrigeration by manipulating driver phase differences.
- To investigate the impact of dynamic boundary conditions on thermoacoustic temperature gradients.
Main Methods:
- Utilized a resonator with dual enclosed driver end-caps and a ceramic thermoacoustic element.
- Employed deltaec simulations to model temperature gradient responses.
- Constructed an experimental apparatus with two moving-coil speakers and a ceramic stack.
Main Results:
- Achieved controllable temperature gradients across the ceramic stack by adjusting the phase difference of the dual drivers.
- Demonstrated that the temperature gradient could be increased, decreased, or reversed.
- Successfully achieved a time-varying desired temperature difference.
Conclusions:
- The study presents a key conceptual advancement in thermoacoustic temperature control.
- The findings enable precise control of refrigeration for applications in extreme environments.
- This method offers enhanced capabilities for precision temperature management devices.
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