Pppe-097 ((link)) -

Is it a:

Key attributes of PPPE‑097 include:

The increasing penetration of intermittent renewable energy sources (solar, wind) mandates effective to smooth supply‑demand mismatches. Phase‑change materials (PCMs) are attractive for TES because they store/release energy at nearly constant temperature during solid–liquid transitions, offering high energy density in a compact form factor [1‑3]. PPPE-097

Discs were stacked (10 layers) and hot‑pressed at 130 °C for 5 min to form cylindrical PCM blocks (diameter = 50 mm, height = 20 mm). Is it a: Key attributes of PPPE‑097 include: