| 摘要 |
An installation for storing thermal energy is provided, comprising a heat accumulator and a cold accumulator. A method for charging and discharging said thermal accumulators is also provided. Using the installation, excess electrical energy can be utilized for converting mechanical energy from a compressor and a turbine into thermal energy, which is available in the heat accumulator and the cold accumulator for a subsequent generation of electrical energy. A temporary heat store is discharged during the charging of the heat accumulator and the cold accumulator, preheating the working gas for the compressor. When the heat accumulator and the cold accumulator are discharged via the turbine and the compressor for the purpose of generating electrical energy, the temporary store can be recharged so that the heat stored therein can be made available for a subsequent charging process of the heat accumulator and the cold accumulator. |
| 主权项 |
1. An installation for storing thermal energy, comprising
a circuit for a working gas, wherein in the circuit the following units are connected to one another in the order indicated by a line for the working gas: a first thermal fluid energy machine, a heat accumulator, a second thermal fluid energy machine and a cold accumulator, wherein, in the throughflow direction of the working gas, as seen from the heat accumulator to the cold accumulator, the first thermal fluid energy machine is connected as a work machine and the second thermal fluid energy machine is connected as a power machine, wherein a low-temperature heat accumulator is provided in the circuit, upstream of the first fluid energy machine, wherein the circuit is embodied as a closed circuit and a heat exchanger is arranged in the circuit, between the cold accumulator and the low-temperature heat accumulator, or the circuit is open between the cold accumulator and the low-temperature heat accumulator. |
