System-level modeling of carbonate-doped sand thermal storage with a thermoelectric module: COMSOL model archive and supporting data

This repository contains the complete finite-element (FE) model set, post-processing scripts, and derived numerical data supporting the manuscript "System-level modeling of carbonate-doped sand thermal storage with a thermoelectric module: inventory basis, bed conduction and contact losses" by Ding et al. The study couples a 1 kWh-scale sand thermal storage bed (plain silica sand vs. 30 wt% Solar Salt carbonate-doped) with a 48-couple filled-skutterudite thermoelectric generator (TEG). All models were built and solved in COMSOL Multiphysics 6.4. The deposit includes: - 44 solved .mph models organized by category: common-vessel discharges (models/source/), equal-1 kWh rebuilds (models/equal_inventory/), revision-round controls and sensitivity sweeps (models/revision/), TEG couple and module (models/teg/), RVE for effective bed conductivity (models/rve/), and exploratory thermoacoustic finite-wall cases (models/exploratory/, retained for transparency but not part of the main results).- 12 Python/Node post-processing scripts used to regenerate figures and the master Excel workbook.- The master Excel workbook (COMSOL_全部实验数据.xlsx), a 23-page acceptance report (PDF), and navigation notes.- High-resolution manuscript figures (graphic abstract, Figures 1–2). Headline results: in the common vessel, the doped bed delivered 137.4 Wh over 8.8 h versus 81.5 Wh over 5.6 h for plain sand (+69%); at equal 1 kWh inventory, the doped bed was 41% shorter and delivered +4.9% gross electricity, with bed conductivity contributing most of the gain and latent heat raising inventory density more than conversion yield. All files are checksummed in SHA256SUMS.txt.