The new Jinhua machine has advanced compressed air energy storage technology-air compressor production capacity.

In November 2018, the first large-scale compressed air energy storage system compressor experiment and testing platform independently developed and designed by the Institute of Engineering Thermophysics of the Chinese Academy of Sciences was completed in the National Energy Large-scale Physical Energy Storage Technology Research and Development Center and Bijie Branch of the Institute of Engineering Thermophysics Debugging. Xinjinhua successfully completed the research and development and production of the air compressor unit, the core equipment of the system. The data indexes of the unit are better than the design standards. The successful debugging of the test platform provides the necessary technical support for the industrialization of China's air energy storage system, makes positive contributions to the construction of a new power system for the country, and helps the realization of the national "double carbon" goal!

The experimental platform adopts a closed cycle system, which can realize the adjustment of the temperature and pressure of the experimental inlet, and at the same time adopts frequency conversion power equipment to realize the adjustable speed. The platform is divided into low-speed and low-pressure experimental system and high-speed and high-pressure experimental system. The system pressure measurement range is 0.5 ~ 110barA, the rotation speed measurement range is 0 ~ 40000r/min, and the power measurement range is 0~10MW. It has the functions of developing single/multi-stage compressor gas dynamics, mechanical performance, coupling characteristics of compressor and heat exchange equipment, variable working condition control law of compression system, performance detection of compression system and performance of special working medium compressor. The system provides a necessary R & D platform environment for the development of large-scale energy storage system compressors.

Relying on the experimental platform, the research institute will study in detail the key scientific issues such as the internal flow field test and optimization of the multi-stage compression system, the operation characteristics under variable working conditions, and the multi-stage control law. It will further carry out the full-size and full-working condition experiments of the compression components of the 10MW compressed air energy storage system and the modeling experiments of the compression components of the 100MW compressed air energy storage system, and carry out the research and development and industrialization of multi-stage high-end compression equipment.

Compressed air energy storage technology

With the proposal of the national strategic goal of "carbon peak and carbon neutrality", the construction of large-scale centralized and distributed renewable energy power stations is actively developed in China. The load fluctuation of the power system is increasing, and the demand for regulation capacity is also increasing. The use of energy storage technology can effectively solve this problem.
Starting from the entire power system, energy storage projects can be applied to different scenarios such as the power generation side, the grid side, and the user side. On the power generation side, energy storage technology can adjust the output of renewable energy power plants according to the characteristics of power demand, market prices and other factors, reduce the phenomenon of "abandoning wind and light", and can also adjust the fluctuation of renewable energy power generation and improve power quality; On the power grid side, energy storage technology can play its role of cutting peaks and filling valleys, balancing supply and demand, and improving power dispatching methods to a certain extent, promote the coordination and optimization of renewable energy and power grid; on the user side, energy storage technology helps to reduce the electricity and capacity electricity charges, increase the proportion of distributed renewable energy generation in place, and improve the reliability of power supply.

Compressed air energy storage is a long-term large-scale physical energy storage method. In layman's terms, it is to use the peak-valley electricity price difference to convert electric energy into air pressure energy for storage when the electricity price is cheap at night. During the peak of electricity consumption during the day, high-pressure air is released to drive the turbine expansion generator set to generate electricity, thus solving the problems of peak cutting and valley filling and low-cost electricity consumption.

Compressed air energy storage technology is cleaner and more efficient than other energy storage technologies, and can realize large-scale and long-term physical energy storage, which is the main direction of future development in the field of energy storage.

Introduction to Institute of Engineering Thermophysics, Chinese Academy of Sciences

The predecessor of the Institute of Engineering Thermophysics of the Chinese Academy of Sciences is the Power Research Office of the Chinese Academy of Sciences founded by Mr. Wu Zhonghua in 1956. For more than 60 years, the Institute has focused on major scientific and technological issues in the field of engineering thermophysics around the major strategic needs of the country. Applied basic research, key technology research and system integration, and constantly consolidate the discipline foundation of "Energy Science and Technology" and "Aerospace Science and Technology, to build an internationally renowned first-class research institute in the field of energy and power, it has won more than 90 national, provincial and ministerial awards, and has made important contributions to the sustainable development of my country's energy and power.

The Institute of Engineering Thermophysics is one of the earliest institutions to carry out research on compressed air energy storage in China. It has established a research and development system with completely independent intellectual property rights. It has successively broken through key technologies such as system full working condition design and control, multi-stage high-load compressors and expanders, and efficient supercritical heat storage and heat exchange. It has built 1.5MW and 10MW advanced compressed air energy storage national demonstration systems, and at home and abroad to take the lead in the 100MW advanced compressed air energy storage system technology research and development and national demonstration projects.