Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and system for accumulating energy by compressed air and heat accumulation medium simultaneously

A heat storage medium and compressed air technology, which is applied in the direction of liquid variable displacement machinery, piston pumps, pump devices, etc., can solve the problems of heat storage potential limitation of heat storage medium, system efficiency decline, high investment cost, etc., and achieve investment cost and The effect of increasing system complexity, increasing system storage capacity, and reducing investment costs

Active Publication Date: 2013-07-31
TSINGHUA UNIV
View PDF8 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the introduction of heat storage tanks, the adiabatic compressed air energy storage system is more complicated, and the initial investment cost is 20-30% higher than that of the non-adiabatic compressed air energy storage system, which limits its application and promotion.
Moreover, due to the limitations of current compressor materials, the air temperature at the outlet of the air compressor is not high, which limits the heat storage potential of the heat storage medium in the heat storage tank
In addition, the turbine inlet temperature will also be limited, which means that when the air storage pressure is high, condensation may occur at the turbine outlet, and it is necessary to increase the turbine outlet pressure or use a two-stage heat storage tank and two Turbine, increasing the outlet pressure of the turbine will lead to a decrease in system efficiency, and the use of two-stage heat storage tanks and two-stage turbines will significantly increase the complexity of the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for accumulating energy by compressed air and heat accumulation medium simultaneously
  • Method and system for accumulating energy by compressed air and heat accumulation medium simultaneously
  • Method and system for accumulating energy by compressed air and heat accumulation medium simultaneously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] The present invention will be described below by taking a system (system 1) that uses two-stage air compression to simultaneously store energy in compressed air and a heat storage medium as an example. The design parameters of the system are as follows: system charging time 8 hours, discharge time 8 hours; underground cavern pressure 100bar, storage temperature 20°C; air compressor outlet can withstand a maximum temperature of 520°C. Compressor efficiency 0.85, turbine efficiency 0.9, heat exchanger pressure loss coefficient 0.01, heat storage tank pressure loss coefficient 0.085, heat storage tank temperature loss 20°C; external environment parameters are: temperature 25°C, pressure 1.013bar. The solid heat storage medium of the system is made of ceramic material, and the storage temperature of the heat storage medium after electric heating is 1500°C. The power consumption of the electric heating element during system charging is approximately the energy required to he...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method and a system for accumulating energy by compressed air and heat accumulation medium simultaneously, and belongs to the field of compressed air energy accumulating. The system comprises a motor, an air compressor, an air storage device, a heat accumulation tin, a turbine and an electric generator. The system comprises the following principles: solid heat accumulation medium and electrical heating elements are arranged in the heat accumulation tin; when the system is charged in off-peak hour period, air is compressed by the air compressor and exchanges heat with the solid heat accumulation medium in the heat accumulation tin; the heat exchanged air is stored in the air accumulation device; the heat exchanged solid heat accumulation medium is heated continuously by using the electrical heating elements; when the system discharges in peak hour period, the accumulated air is released, and enters the turbine to work after absorbing the heat from the solid heat accumulation medium; and the electric generator is driven by the turbine to generate electricity. Compared with the conventional adiabatic compression air energy accumulating system, the system has the advantages that the memory capacity is greatly increased; the unit capacity investment cost is reduced; the system only needs to adopt a one-stage heat accumulation tin and a one-stage turbine; and the system complex degree is low.

Description

technical field [0001] The invention relates to a method and system for simultaneously storing energy by using compressed air and a heat storage medium, and belongs to the technical field of compressed air energy storage. Background technique [0002] At present, the development of renewable energy including wind energy and solar energy has drawn increasing attention to energy storage technology. A major problem with renewable energy is its instability. External climate conditions at different times will cause large fluctuations in power generation, which has a great negative impact on grid-connected operation or matching with user needs. Therefore, it is crucial to develop appropriate energy storage technology to adjust the power generation at different times to meet the needs of grid connection or users. [0003] Among the current common energy storage technologies, compressed air energy storage technology has great development potential. Its storage capacity is equivalen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04B41/02F04B35/04F01D15/10
Inventor 王哲杨志伟侯宗余李政
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com