Thermodynamic and economic analysis of a liquid air energy storage system with an elevated cryogenic storage configuration
Zhao, Yifan (2026)
Katso/
Sisältö avataan julkiseksi: 16.06.2028
Diplomityö
2026
School of Energy Systems, Energiatekniikka
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2026061671405
https://urn.fi/URN:NBN:fi-fe2026061671405
Tiivistelmä
This study examines a Liquid Air Energy Storage (LAES) system model developed with EBSILON Professional. It includes both thermodynamic and economic analysis. The model was checked against literature data and matched the reference system. A pressure study found a suitable discharge pressure.
The results show that raising the discharge pressure increases discharge efficiency; however, the rate of improvement slows at higher pressures.
An improved cryogenic storage setup was proposed to shift part of the cryogenic pumping demand from the discharging stage to the charging stage through hydrostatic pressure. In this setup, part of the required pressure increase during discharge is provided by the elevated storage tank. An economic analysis used hourly electricity price data.
The research shows that the proposed setup can transfers the pumping demand to lower-priced charging periods. While this requires additional investment in infrastructure, the estimated payback period is around four years under the assessed conditions. The results suggest that the proposed elevated cryogenic storage setup can shift pumping electricity demand to lower-priced charging periods whilst maintaining the thermodynamic performance of the LAES system.
The results show that raising the discharge pressure increases discharge efficiency; however, the rate of improvement slows at higher pressures.
An improved cryogenic storage setup was proposed to shift part of the cryogenic pumping demand from the discharging stage to the charging stage through hydrostatic pressure. In this setup, part of the required pressure increase during discharge is provided by the elevated storage tank. An economic analysis used hourly electricity price data.
The research shows that the proposed setup can transfers the pumping demand to lower-priced charging periods. While this requires additional investment in infrastructure, the estimated payback period is around four years under the assessed conditions. The results suggest that the proposed elevated cryogenic storage setup can shift pumping electricity demand to lower-priced charging periods whilst maintaining the thermodynamic performance of the LAES system.