【Ten Years of Rapid Development in Chemical Engineering Equipment】2016–2024: Qujing, Yunnan builds the world’s first pilot project for megawatt-scale air thermodynamic cycle energy storage (hereinafter referred to as “CASE”)
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Let’s give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Progress in Chemical Engineering Equipment】Regular updates and summaries are available – feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** According to a report dated January 4, 2024, **Power Investment Group Co., Ltd. announced that the world’s first pilot project for megawatt-scale air thermodynamic cycle energy storage (referred to as “CASE”) was inaugurated in the industrial park of Luliang County, Qujing, Yunnan. This project was independently developed by **Yunnan International Power Investment Co., Ltd. of China Power Investment Group (hereinafter referred to as ‘Yunnan International’)** and **China Power Investment Group Science and Technology Research Institute Co., Ltd. (hereinafter referred to as ‘Central Research Institute’)**. The project is located in the Qingshan Industrial Park of Luliang County, covers an area of over 4,000 square meters, has a power capacity of 1 megawatt, and an energy storage duration of 4 hours. Upon completion, the project will be able to store and supply three types of energy: cold, heat, and electricity. It will provide green power to industrial parks, as well as heat at temperatures up to 550°C and cold at temperatures as low as -20°C, with an overall energy utilization rate of over 80%. It is understood that CASE energy storage technology utilizes a reversible closed-loop system to store both heat and cold, enabling efficient thermoelectric conversion. It represents a new type of long-duration energy storage solution that offers advantages such as flexible deployment, high safety, low cost, and the ability to store large amounts of energy. This technology can better address the intermittency, volatility, and randomness of new energy power supply, thereby meeting the needs for a stable and uninterrupted power supply in the grid. Technical Overview: The new air-based thermodynamic cycle energy storage (CASE) is a completely new type of large-scale, long-duration energy storage technology. It uses air as the working fluid to store electrical energy in the form of heat and cold, establishing a bridge for the conversion between heat and electricity through thermodynamic cycles. During the off-peak hours when electricity demand is low, renewable energy or cheap electricity is used to drive the compression and expansion devices, converting electrical energy into heat and cold energy, which are then stored in heat storage and cold storage media respectively ； During the discharge process, at peak electricity demand, the stored thermal and thermal energy is used to drive the compression and expansion devices, thereby enabling the system to supply power externally.
In March 2025, the second review of the commissioning plan was completed for the pilot-scale development project of megawatt-class air thermodynamic cycle energy storage (CASE). This review meeting was jointly organized by the Academia Sinica and Yunnan International. A panel of 6 experts from Xi’an Thermal Power Institute, **Energy Group Science and Technology Research Institute Co., Ltd., Shanghai Institute of Applied Physics of the Chinese Academy of Sciences, and Zhejiang State Energy Power Technology Co., Ltd. was invited to participate. After listening to the reports presented by the project commissioning unit and the manufacturers of the core equipment regarding the project commissioning plan and specific commissioning measures, the panel raised questions and engaged in discussions on aspects such as the start-up and shutdown procedures, the commissioning plan for the molten salt system, and the configuration of auxiliary systems. The home team believes that the preparation of the commissioning plan is in line with the actual conditions of the project, is well-supported by theoretical foundations, and covers all relevant aspects as a whole. Subsequently, under the guidance of experts, further in-depth additions and improvements will be made to the details. As the Academia Sinica’s pioneering initiative in the field of long-duration energy storage, the Chunuo heat pump energy storage technology is aimed at conducting engineering tests, accumulating design and operational experience, and promoting the industrialization and demonstration of this technology. This review leveraged the expertise and experience of specialists to ensure that the solution is technically feasible, securely reliable, and meets quality standards. It also helped optimize resource allocation and overall processes, reducing project risks and improving the efficiency and success rate of debugging, thereby laying a solid foundation for subsequent system debugging tasks. Going forward, the Academia Sinica will adhere to science and technology leadership as well as innovation-driven development, and make every effort to ensure that all experimental tasks are completed on schedule, with high quality and in accordance with the required standards.
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