Szczegóły publikacji
Opis bibliograficzny
Effects of very low piston speed regimes on near-isothermal behaviour of piston expanders for micro-CAES systems / Dominik GRYBOŚ, Jan MARKOWSKI, Jacek LESZCZYŃSKI // W: ICEE 2026 [Dokument elektroniczny] : sustainability, innovation and transitions - bringing together economics and engineering : 7th International Conference on Energy & Environment : 18 - 19 June, Porto, Portugal : proceedings / eds. Susana Silva, Vitor Miguel Ribeiro. — Wersja do Windows. — Dane tekstowe. — Porto : School of Economics and Management of the University of Porto Publisher, 2026. — S. 411–416. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://icee2026.fep.up.pt/wp-content/uploads/sites/1070/2026... [2026-08-20]. — Bibliogr. s. 415–416, Abstr. — Dostęp po zalogowaniu
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 169509 |
|---|---|
| Data dodania do BaDAP | 2026-09-21 |
| Rok publikacji | 2026 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
Abstract
The development of efficient long-duration energy storage technologies is essential for the integration of variable renewable energy sources. Compressed Air Energy Storage (CAES) is considered a promising mechanical storage solution due to its scalability, long lifetime, and relatively low environmental impact. However, micro-scale CAES systems are characterised by low round-trip efficiency, primarily due to thermodynamic losses during air expansion. Achieving near-isothermal expansion remains a key challenge for improving system performance. This study experimentally investigates a multi-piston air expander operating in an extra-low-speed regime relevant to micro-CAES systems. The effects of linear speed (up to 0.61 m/s) on the air expansion process are analysed. Experiments were conducted on a dedicated three- piston electro-pneumatic test rig equipped with high-resolution pressure and temperature measurements. The results show that lower piston velocities yield conditions closer to near-isothermal expansion due to longer thermal relaxation times, highlighting the potential of low-speed piston expanders to improve micro- CAES efficiency.
