I. Project Introduction The damless pumped storage technology is a brand-new principle of highly efficient energy storage, similar to other large-scale physical energy storage technologies, it is the most effective method to solve China's increasingly serious problems of wind and solar power curtailment and grid peak shaving, and belongs to the cutting-edge technology in the field of energy. It has the advantages of both pumped storage and compressed air energy storage technologies: high charging and discharging efficiency (greater than 70%), relative to pumped storage technology, it has a higher energy density, shorter construction period, lower investment, and is not constrained by geological environment. Before energy storage begins, the cushion gas compressor or high-pressure gas cylinder first inflates the water-gas co-container to a certain predetermined pressure; then the high-pressure water pump overcomes the pressure difference inside and outside the water-gas co-container, injects water into it, causing the water level to rise and thus compressing the high-pressure gas inside the energy storage container, achieving pumping energy storage; the high-pressure gas drives the water turbine generator to generate electricity with the help of water. Product Performance Advantages System Performance System Types Investment (by Power Generation) $/kW Total Capacity of Stored Energy MWh Energy Conversion Efficiency % Operating and Maintenance Cost $/kW/yr Response Time Total Installed Capacity MW Compressed Air Energy Storage 960-1250 5-100,000 <70 1.35 1-10 minutes 0.5-2,700 Pumped Storage 1,500-4,300 >20,000 <70 4.3 10 seconds to 4 minutes 300-1,800 Pumped Compressed Air Energy Storage 315 to 472 3-100,000 Approximately 70 1.2 10 seconds to 5 minutes 0.5 to 2,500 Flywheel energy storage 1,900 to 2,250 0.0002 to 500 90-93 7.5 <1 second 0.001 to 1 Superconducting electromagnetic energy storage 300 0.0002 to 100 95 1 <1 second 0.001 to 2 Battery energy storage (Lithium battery) 1200 to 4600 0.0002-2 90 <1s 0.01-3 Battery energy storage (sodium sulfur) 3200 to 4200 0.0001-3 80 <1s 0.01-4 III. Market prospects and applications 1. Clean renewable energy field Photovoltaic power stations, wind farms. China currently has 100 billion kilowatt-hours of abandoned wind, light, and hydroelectric energy. 2. Smart grid Internationally, the grid peak shaving capacity is 12-15%, while China's grid peak shaving capacity is less than 2%, and it mainly relies on thermal power units. 3. Nuclear power plants and power stations IV. Technological maturity The principle has been verified, to accelerate the advancement of this technology's engineering application process. An experimental power station of MW level is under construction. Eight core invention patents have been applied for, with three granted.