Air tightness requirements for commercial vehicle energy storage devices

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.

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.

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.

What if energy storage system and component standards are not identified?

Energy Storage System and Component Standards 2. If relevant testing standards are not identified, it is possible they are under development by an SDO or by a third-party testing entity that plans to use them to conduct tests until a formal standard has been developed and approved by an SDO.

Does air tightness vary with air pressure?

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. Finally, a compressed air storage energy cavern is taken as an example to understand the air tightness.

What is the new NEC Article 706 energy storage system?

The 2017 NEC is likely to replace references to ESS installation in Article 480 and has proposed a new Article 706 Energy Storage Systems that consider the application of electrochemical energy storage along with other types of energy storage that are referenced in other Articles within the code (e.g., PV, Wind, etc.)