Energy storage cluster airtightness test

What is air tightness model of compressed air storage energy caverns?

The air tightness model of compressed air storage energy caverns is then established. In the model, the permeability coefficient and air density of sealing layer vary with air pressure, and the effectiveness of the model is verified by field data in two test caverns.

What is compressed air storage energy cavern?

Finally, a compressed air storage energy cavern is taken as an example to understand the air tightness. The air leakage rate in the caverns is larger than that using air-pressure-independent permeability coefficient and air density, which is constant and small in the previous leakage rate calculation.

Why is air tightness important in polymer sealing caverns?

During the operation of compressed air storage energy system, the rapid change of air pressure in a cavern will cause drastic changes in air density and permeability coefficient of sealing layer. To calculate and properly evaluate air tightness of polymer sealing caverns, the air-pressure-related air density and permeability must be considered.

Why is cavern airtightness important?

The sensitivity of cavern airtightness to different parameters is analyzed. Large-scale compressed air energy storage (CAES) technology can effectively facilitate the integration of renewable energy sources into the power grid. The airtightness of caverns is crucial for the economic viability and efficiency of CAES systems.

How is the air tightness model validated?

The model is validated using field measurement data, numerical simulations, and analytical solutions. Subsequent simulations were conducted to analyze air leakage, pore pressure, and leakage range under various operating conditions. Finally, the impacts of different parameters on air tightness were assessed.

Which energy storage technologies are most efficient?

Currently, the existing large-scale energy storage technologies include pumped hydro energy storage (PHES), geothermal, hydrogen, and compressed air energy storage (CAES) [, , , , ]. However, only PHES and CAES demonstrate economic efficiency in large-scale, high-power operation conditions.