Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange

摘要

A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

主权项

1. An apparatus comprising:
an energy storage system comprising,
a chamber receiving a moveable member,a mechanical linkage comprising a rotating shaft and configured to transmit a power from a source of shaft torque comprising a motor into the chamber to drive the moveable member to compress gas, anda sprayer configured to effect gas-liquid heat exchange within the chamber; and a host computer comprising a processor in electronic communication with a non-transitory computer readable storage medium, the non-transitory computer readable storage medium having stored thereon one or more codes to instruct the processor to,
receive a signal indicating a property of the energy storage system,in response to the received signal, control the energy storage system to maintain a gas temperature within a range, wherein the code stored on the non-transitory computer readable storage medium is configured to control an amount of power applied to the motor.