Thermoacoustic heat pumps are a promising new technology for high‑temperature heat provision by converting acoustic work into thermal energy through a thermodynamic process similar to the Stirling cycle. Their mechanical simplicity, the absence of moving parts, and the potential use of environmentally friendly working media make thermoacoustic systems an attractive alternative to conventional compression‑based heat pumps. The regenerator – a porous structure that enables cyclic heat exchange between the oscillating working gas and the solid matrix – is the key component governing thermoacoustic conversion efficiency. Its hydraulic resistance and thermal interaction with the working fluid critically influence acoustic losses and the achievable temperature lift.

Within this new project, the objective is to develop and optimize advanced regenerator structures specifically tailored for high‑temperature thermoacoustic heat pumps. This is pursued through a simulation‑driven design approach, including pore‑scale modelling of the regenerator stack. By systematically varying mesh geometry, orientation, and porosity, we identify regenerator configurations that minimize viscous and thermal losses while maximizing heat‑pumping performance at elevated operating temperatures. First results of this project are expected in April and are therefore not yet included in this contribution.