| 摘要 |
The invention relates to a combined system for generating electrical energy consisting of a power plant and an air handling system. The power plant comprises a first gas expansion unit connected to a generator. The air handling system comprises an air compression unit, a heat exchange system, and a fluid tank. In a first operating mode, feed air is compressed in the air compression unit and cooled in the heat exchange system against a first and a second coolant. A storage fluid is generated and stored as cryogenic fluid in the fluid tank. In a second operating mode, cryogenic fluid is removed from the fluid tank, vaporized, or pseudo-vaporized, at superatmospheric pressure, and heated in the heat exchange system against the second and first coolants. |
| 主权项 |
1. A method for generating electrical energy in a combined system made up of a power plant and an air treatment plant, wherein the power plant has a first gas expansion unit (300), which is connected to a generator for generating electrical energy, and the air treatment plant has an air compression unit (2), a heat exchanger system (21) and a liquid tank (200), and wherein in a first operating mode
in the air treatment plant feed air is compressed in the air compression unit (2) and cooled in the heat exchanger system (21), a storage fluid is produced from the compressed and cooled feed air, the storage fluid is stored as a cryogenic liquid (101) in the liquid tank (200), a stream of a first refrigeration transfer medium is introduced in the liquid state into the heat exchanger system (21), where it is warmed from a first temperature level T1 to a second temperature level T2, and a stream of a second liquid refrigeration transfer medium is introduced in the liquid state into the heat exchanger system (21), where it is warmed from a third temperature level T3 to a fourth temperature level T4,and in a second operating mode
cryogenic liquid (103) is taken from the liquid tank (200) and vaporized or pseudo-vaporized and warmed as a high-pressure stream in the heat exchanger system (21) in indirect heat exchange, and the gaseous high-pressure storage fluid (104) generated in the process is expanded in the gas expansion unit (300), a stream of the first refrigeration transfer medium is introduced in the liquid state into the heat exchanger system (21), where it is cooled from the second temperature level T2 to the first temperature level T1, and a stream of the second liquid refrigeration transfer medium is introduced in the liquid state into the heat exchanger system (21), where it is cooled from the fourth temperature level T4 to the third temperature level T3, and the (pseudo-)vaporization of the cryogenic liquid (103) is carried out, characterized in that,in the first operating mode, the feed air compressed in the air compression unit (2) passes into indirect heat exchange with the first liquid refrigeration transfer medium and with the second liquid refrigeration transfer medium at the same pressure in the heat exchanger system (21). |
