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A working method of compressed air energy storage power generation system

A compressed air energy storage and power generation system technology, applied in energy storage, climate sustainability, greenhouse gas reduction, etc., can solve the problems of low heat storage density, low heat storage power generation efficiency, etc., to improve thermal efficiency and energy storage density and the effect of increasing the energy storage capacity and improving the ability to expand and work

Inactive Publication Date: 2017-08-22
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: the purpose of the invention is to solve the existing problems of low heat storage power generation efficiency and low heat storage density

Method used

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  • A working method of compressed air energy storage power generation system
  • A working method of compressed air energy storage power generation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 Shown is a schematic diagram of the principle structure of the compressed air energy storage power generation system using one-stage air compression provided by the present invention. The high-efficiency power generation system includes a compressed air storage tank and an energy charging unit and an energy releasing unit connected thereto. The charging unit includes an air compressor 2 and an electric motor 1 matching it. A heat storage tank 3 and a cooler 5 are arranged in series near the outlet of the air compressor 2, and a heat storage medium molten salt 4 and a heat storage medium are provided in the heat storage tank. Electric heating element 6. The energy release unit includes a heat storage tank 3, an air turbine 10b and a gas turbine 10a, a generator 11 matching the turbine 10, and a regenerator 12 arranged behind the gas turbine 10a. The bypass 13 is connected across the pipeline between the outlet of the regenerator 12 and the outlet of th...

Embodiment 2

[0042] Such as figure 2 Shown is a schematic diagram of the principle structure of the compressed air energy storage power generation system using two-stage air compression provided by the present invention. Its basic structure and working process are basically the same as the above-mentioned first embodiment, the difference is that the second embodiment has an additional primary air compressor, primary heat storage tank and primary cooler; therefore, during the peak period of electricity consumption , after the compressed air leaves the compressed air storage tank 7, it no longer directly enters the regenerator 12 for heating, but first enters the first-stage air compressor 2a and then the first-stage heat storage tank 3a connected in series for preheating, and then Entering the regenerator 12 to continue heating, and no electric heating element 6 is installed in the first-stage heat storage tank 3a, the purpose is to increase the heat recovery rate of the high-temperature f...

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Abstract

The invention discloses a compressed air energy-storage power generation system and a working mode thereof. The compressed air energy-storage power generation system comprises a compressed air storage device, as well as an energy charge unit and an energy release unit which are connected with the compressed air storage device, wherein the energy charge unit comprises a plurality of stages of serially connected air compressors, and a primary heat accumulation tank and a primary cooler which are connected in series are sequentially arranged close to the outlet of each stage of the air compressors; and the energy release unit comprises a heat accumulation tank, a plurality of stages of serially connected turbines and a regenerator arranged behind the final-stage turbine, and except for the final-stage turbine which is a gas turbine, others are all air turbines. The compressed air energy storage power generation system further comprises a bypass crossing over the outlet of the regenerator and the outlets of all the stages of air turbines. The invention also discloses a working mode of the compressed air energy storage power generation system. Compared with a conventional compressed air energy-storage system, the compressed air energy-storage power generation system is larger in energy density, higher in output power, relatively high in efficiency and suitable for large-scale intake of off-peak electric energy, or wind power, photo-electricity and other unstable renewable energy resources, thereby realizing load shifting of a grid and stable grid connection of the renewable energy resources and acquiring substantial economic benefits.

Description

technical field [0001] The invention relates to a power generation system, in particular to a working mode of a compressed air energy storage power generation system. Background technique [0002] In recent years, with the continuous expansion of the scale of the power grid and the development and utilization of renewable energy such as wind energy and solar energy, a series of problems in the power grid have gradually become prominent. [0003] First of all, there are peaks and valleys of power consumption in the power grid, and there will be situations of insufficient power during peak power consumption, power rationing between pullouts, and power waste during low valleys of power consumption. In low valleys, although the power plant has the function of reducing load, it is at the cost of low efficiency operation; in peak hours, the gas turbine power plant for peak regulation can be quickly started for peak regulation, but the efficiency is low during peak regulation and n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C6/00F02C6/18F01D15/10F04B35/04F04B41/02F04B41/06
CPCY02E70/30
Inventor 向文国马士伟赵明赛俊聪梁俊宇邱亚林耿向瑾陈晓平
Owner SOUTHEAST UNIV