Carbon Storage is Here! Completion of the World's Largest Project

Carbon dioxide energy storage is a kind of compressed gas energy storage, which uses carbon dioxide as a circulating working medium for charging and discharging. Flywheel energy storage is an energy storage method that realizes the bidirectional conversion of electrical energy and kinetic energy through the combination of a motor/generator integrated bidirectional high-efficiency motor and a flywheel in a vacuum, and can achieve a rapid response in milliseconds.

On August 25, the completion ceremony of the world's first carbon dioxide + flywheel energy storage demonstration project was successfully held in Deyang. This project is also the carbon dioxide energy storage project with the largest single machine power and the largest energy storage capacity in the world!

The project is jointly built by Dongfang Steam Turbine and Bairan New Energy Technology (Shenzhen) Co., Ltd., School of Energy and Power Engineering of Xi'an Jiaotong University, and Beijing Honghui International Energy Technology Development Co., Ltd. The project covers an area of 18,000 square meters, which is about the size of two and a half football fields. The energy storage scale is 10MW/20MWh. It can store 20,000 kWh of electricity in 2 hours. The world's first carbon dioxide + flywheel energy storage integrated energy station.

When the electricity consumption is low, this "charging treasure" turns on the charging mode, the compressor starts, and it can compress all the carbon dioxide gas with a volume of 250,000 cubic meters in the huge flexible gas tank into liquid in 2 hours, and the volume is only 1 /300; when the peak of electricity consumption comes, it will return to the gaseous state and push the turbine to generate electricity. It also only takes 2 hours to generate 20,000 kWh of electricity, which is enough for more than 60 households to use for 1 month.

As the compressor starts up and steadily increases to the rated speed, the carbon dioxide gas is extracted and compressed from the huge flexible gas tank, marking the official completion of the world's first carbon dioxide + flywheel energy storage demonstration project, which is presented to the world, which is also the world in 2022. One of the demonstration application scenarios of the Clean Energy Conference.

The partners of the project rely on more than ten years of accumulated experience in new material and system design integration, research and development and engineering application experience in new energy systems and carbon dioxide power equipment, and the first domestic supercritical carbon dioxide system compressor/turbine operating at full load. The successful development experience of power equipment has achieved a series of research results in thermal system integration and optimization, turbine equipment development, economic design, etc., breaking through many core technologies of energy storage systems and power equipment, and has completely independent intellectual property rights , The completion of the project will further accelerate the pace of my country's new power system construction, and help my country's new energy storage technology to walk in the forefront of the world.

Carbon dioxide energy storage features:

Carbon dioxide energy storage is a kind of compressed gas energy storage, which uses carbon dioxide as a circulating working medium to charge and discharge, just like a super "charging treasure". When the electricity consumption is low, this "charging treasure" turns on the charging mode, the compressor starts, and it can compress all the carbon dioxide gas with a volume of 250,000 cubic meters in the huge flexible gas tank into liquid in 2 hours, and the volume is only 1 /300; when the peak of electricity consumption comes, it will return to the gaseous state and push the turbine to generate electricity. It also only takes 2 hours to generate 20,000 kWh of electricity, which is enough for more than 60 households to use for 1 month. Flywheel energy storage is an energy storage method that realizes the bidirectional conversion of electrical energy and kinetic energy through the combination of a motor/generator integrated bidirectional high-efficiency motor and a flywheel in a vacuum, and can achieve a rapid response in milliseconds.

Combined with the advantages of carbon dioxide energy storage for a long time, large scale, and fast response speed of flywheel energy storage, the world's first carbon dioxide + flywheel energy storage demonstration project can effectively smooth the grid volatility, solve intermittent problems, and realize the safe operation of the power grid. No fossil fuels are used in the process, no solid waste is generated, zero carbon emissions, green and environmental protection.

Compared with other energy storage systems, carbon dioxide energy storage systems do not require mountains and rivers, do not need underground caves, are not restricted by geographical conditions, and can be built anywhere with a construction period of less than 2 years; compared with electrochemical energy storage, It does not use rare metals or precious metals, and the working conditions are stable, and the cycle efficiency can be maintained above 60% in the service life of up to 30 years. Carbon dioxide has the excellent advantages of being non-toxic, non-flammable, and easy to obtain. It can be liquefied at room temperature, which can be easily stored in liquid state, and the storage cost is low, safe and reliable.

The carbon dioxide energy storage system has a wide range of power levels, capacities and regional adaptability, and has excellent economic benefits in large-capacity long-term energy storage, especially suitable for 10MW, 100MW and 1000MW long-term energy storage systems. The system can not only be matched with new energy sources such as solar power and wind power to effectively make up for the weakness of its inability to provide stable and continuous power supply, but also can be used with traditional thermal power as a power compensation for small load conditions when traditional thermal power operates flexibly. The project has broad application prospects and is expected to become one of the key forces supporting the achievement of my country's "dual carbon" goal to improve the peak shaving capacity and comprehensive utilization efficiency of energy.