SYSTEM FOR STORING ENERGY BY MEANS OF COMPRESSED AIR

摘要

A plant for storing energy by means of compressed air, in which: a storage volume accommodates air at elevated pressure pH; for energy storage, ambient air is compressed and introduced into the storage volume; for removal from storage, compressed air is extracted from the storage volume and discharged into the environment, performing work; at least one low-pressure turbomachine for alternate compression and expansion respectively compresses ambient air to a medium pressure pM and expands said ambient air from said pressure; at least one high-pressure machine for alternate compression and expansion respectively compresses air from the medium pressure pM to the store pressure pH and expands said air from the latter pressure; and said low-pressure turbomachine and high-pressure machine are connected in series in terms of flow and are mechanically coupled to in each case one, or to one common, electric machine that operates selectively as a motor and generator.

主权项

1. A plant for storing energy by means of compressed air, in which:
a storage volume accommodates air at elevated pressure pH, for energy storage, ambient air is compressed and introduced into the storage volume, for removal from storage, compressed air is extracted from the storage volume and discharged into the environment, performing work, a turbomachine (low-pressure turbomachine), or multiple such machines, for alternate compression and expansion respectively compresses ambient air to a medium pressure pM and expands said ambient air from said pressure, a machine (high-pressure machine) for alternate compression and expansion respectively compresses air from the medium pressure pM to the store pressure pH and expands said air from the latter pressure, or multiple such machines connected in parallel in terms of flow perform said task, and said machines (low-pressure turbomachine and high-pressure machine) are connected in series in terms of flow and are mechanically coupled to in each case one, or to one common, generator/motor (that is to say an electric machine that operates selectively as a motor and generator).