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Design, Construction and Resonance Tracking of a Laboratory-Scale, Loudspeaker-Driven Thermoacoustic Cooler


M. Giftthaler

Master Thesis, FS 13 (10277)

This thesis describes the design, construction and control of a quarter-wavelength, loudspeaker-driven thermoacoustic refrigerator. The stack and resonator design is based on linear thermoacoustic theory combined with numerical simulations in the thermoacoustic design software DeltaEC. The mechanical layout focuses on experimental exibility and ease of maintenance, which leads to a modular system design. Despite using air at ambient pressure as working uid, the presented thermoacoustic cooler reaches more than 20 degrees Celsius temperature di erence across the stack. Based on an experimental system characterization, two di erent performance criteria and control goals are identi ed. For tracking the system's acoustic resonance frequency, a novel, harmonics-based control strategy is proposed, which does not require measurement nor estimation of the speaker state.


Type of Publication:

(12)Diploma/Master Thesis

R. S. Smith

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% Autogenerated BibTeX entry
@PhdThesis { Xxx:2014:IFA_4658
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