Szczegóły publikacji
Opis bibliograficzny
Analysis of intermittent supply of compressed air mass and heat into piston expander in micro compressed air energy storage / Dominik GRYBOŚ, Jan MARKOWSKI, Michał Mazur, Paweł Gurbiel, Jacek LESZCZYŃSKI // W: ECOS 2025 [Dokument elektroniczny] : 38th international conference on Efficiency, Cost, Optimization, Simulation and Environmental impact of energy systems : Paris, France, 29 June - 4 July 2025. — Wersja do Windows. — Dane tekstowe. — [France : ECOS], [2025]. — S. 1–11. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://v4.event-vert.org/uploads/AbstractsBundle/ECOS2025/fu... [2025-07-21]. — Bibliogr. s. 10–11, Abstr.
Autorzy (5)
Dane bibliometryczne
| ID BaDAP | 161334 |
|---|---|
| Data dodania do BaDAP | 2025-07-30 |
| Rok publikacji | 2025 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
Abstract
The development of highly efficient and long-term electricity storage technology at micro- and small-scale is cur- rently of greatest interest to scientists and engineers. This is related to high-level integration of inflexible renewable energy sources in terms of maintaining key parameters in the local energy system. One of the technologies is micro-Compressed Air Energy Storage (micro-CAES). The biggest barrier to the development of micro-CAES is the low Roundtrip Efficiency (RE) and high investment costs. The low RE value is due to the decrease in storage pressure during discharge and the endothermic process of air expansion. Due to the pressure drop in the Mechanical Energy Storage (MES) during discharge, it forces the use of pressure reducers (which causes energy losses) or the implementation of complex isobaric storage systems to stabilise inlet pressure into expander. Additionally, because of the temperature drop of air during expansion, it is necessary to supply heat either before (adiabatic CAES approach) or within (isothermal CAES approach) of the expander. The influence of the control algorithm and air temperature on the piston expander’s dynamics and output power was investigated. We estimate that heating the air before expansion causes a decrease in the mass flow and an extension of the discharge process, but requires a lot of thermal power. However, conducting the expansion close to isothermal reduces the temperature differences and requires low thermal power, but the generated electrical power is not stable.
