High-temperature energy store with recuperator

摘要

A charging circuit for converting electrical energy into thermal energy is provided, having a compression stage, connected via a shaft to an electric motor, a heat exchanger and an expansion stage, which is connected via a shaft to a generator, wherein the compression stage is connected to the expansion stage via a hot-gas line, and the heat exchanger is connected on the primary side into the hot-gas line, wherein the expansion stage is connected via a return line to the compression stage, so that a closed circuit for a working gas is formed. A recuperator is also provided which, on the primary side, is connected into the hot-gas line between the heat exchanger and the expansion stage and, on the secondary side, is connected into the return line, so that heat from the working gas in the hot-gas line can be transferred to the working gas in the return line.

主权项

1. A system comprising a charging circuit for converting electric energy into thermal energy, the charging circuit comprising:
a compression stage, which is connected via a motor shaft to an electric motor, a Heat exchanger and an expansion stage, which is connected via a charging circuit generator shaft to a charging circuit generator, wherein the compression stage is connected to the expansion stage via a hot gas line, and the heat exchanger is connected on the primary side into the hot gas line, and wherein the expansion stage is connected to the compression stage via a return line so that a closed circuit for a working gas is formed, and a recuperator which is connected on the primary side into the hot gas line between the heat exchanger and the expansion stage and connected on the secondary side into the return line so that heat of the working gas in the hot gas line can be transferred to the working gas in the return line, the system further comprising a discharging circuit that is discrete from the charging circuit and which comprises: a thermal store that receives heat from the charging circuit; a medium that receives heat from the thermal store; and a discrete energy extractor that extracts the received heat from the medium, wherein the thermal store receives the heat from the working gas in the charging circuit, and wherein the heat exchanger is configured such that a pressure of the working gas is reduced when delivering the heat to the thermal store.