Patent ID: 11940224
Assignee: STIESDAL STORAGE A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 9:
10. The method according to claim 9, wherein the energy converter also comprises an expander-driven generator for generating electricity in a discharging period by expanding the gas through an expander and driving the expander by expansion; wherein the TES system comprises a second TES container with a second TES medium; the method further comprising:
interconnecting the top of the first TES container and a top of the second TES container through the compressor and interconnecting the bottom of the first TES container and a bottom of the second TES container through the expander during charging and transferring thermal energy from the second TES medium to the first TES medium during charging, and interconnecting the top of the first TES container and the top of the second TES container through the expander and interconnecting the bottom of the first TES container and the bottom of the second TES container through the compressor during discharging and transferring thermal energy from the first TES medium to the second TES medium during discharging;
wherein compression in the compressor and expansion in the expander are adiabatic and thermal transfer between the gas and the first TES medium and the gas and the second TES medium is isobaric.