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Adiabatic compressed air energy storage system with liquid thermal energy storage

A technology for compressing air and air, applied in gas/liquid distribution and storage, fixed-capacity gas storage tanks, pressure vessels, etc.

Inactive Publication Date: 2012-09-12
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of such high operating temperatures remains a considerable barrier to the realization of ACAES systems in commercial operation

Method used

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  • Adiabatic compressed air energy storage system with liquid thermal energy storage
  • Adiabatic compressed air energy storage system with liquid thermal energy storage

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Experimental program
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Embodiment Construction

[0016] Embodiments of the present invention provide a multi-level ACAES system with a TES system. A multi-stage ACAES system preferably includes a two-stage compression / expansion system that includes a low-pressure stage and a high-pressure stage; however, embodiments of the present invention may include more than two-stage compression / expansion systems. The TES system preferably comprises a liquid TES system with heat exchangers for each stage of compression / expansion. The TES system also preferably includes a single tank containing the liquid TES medium that is simultaneously pumped through the heat exchanger during operation. The tank is preferably configured to separate the hot liquid TES medium therein from the cold liquid TES medium therein via a separation system which may include, for example, (1) a system for stratification due to gravity and prevention of mixing and convection, (2) Separation via floating piston, or (3) with thermocline and regenerative heat storage...

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Abstract

An adiabatic compressed air energy storage (ACAES) system (10) includes a compressor system (16), an air storage unit (20), and a turbine system (18). The ACAES system further includes a thermal energy storage (TES) system (40) that includes a container (44), a plurality of heat exchangers (54, 56), a liquid TES medium conduit system (58) fluidly coupling the container to the plurality of heat exchangers (54, 56), and a liquid TES medium stored within the container (46). The TES system also includes a plurality of pumps (60, 62) coupled to the liquid TES medium conduit system and configured to transport the liquid TES medium (46) between the plurality of heat exchangers (54, 56) and the container (44), and a thermal separation system (48) positioned within the container (44) configured to thermally isolate a first portion of the liquid TES medium at a lower temperature (52) from a second portion of the liquid TES medium at a higher temperature (850).

Description

technical field [0001] Embodiments of the present invention relate generally to compressed air energy storage (CAES) systems, and more particularly to multi-stage thermal energy storage (TES) systems in adiabatic CAES systems. Background technique [0002] Air compression and expansion systems are used in many industries for a variety of applications. For example, one such application is the use of air compression and expansion systems for energy storage. A compressed air energy storage (CAES) system typically includes a compression train having a plurality of compressors that compress inlet air and provide the compressed inlet air to a cavern, underground storage, or other compressed air storage means. The compressed air is then subsequently used to drive a turbine to generate electricity. During operation of the compression stage of a CAES system, the compressed inlet air is typically cooled. During the expansion phase of operation, air is expelled from underground stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C6/16F02C7/10F02C1/00F17C1/00
CPCF02C1/005F02C6/16F02C6/18F02C7/10F05D2220/60Y02E60/16
Inventor S.W.弗罗伊恩德M.芬肯拉特C.博特罗C.S.K.贝罗尼M.A.冈萨雷斯萨拉扎S.M-N.霍夫曼
Owner GENERAL ELECTRIC CO