How can reusing storage nitrogen reduce the cost of electricity?

By reusing storage nitrogen and recovering compression heat, the proposed process reduces the initial investment cost by half while achieving a dynamic payback period of 6 years with a levelized cost of electricity at $82.8/MWh.

What is the energy storage process of nitrogen compressors?

During the energy storage process, the waste heat of nitrogen compressors is stored in the high-temperature oil tank. The specific process is: the energy storage nitrogen (stream 38) is pressurized to the charging pressure by the independent nitrogen compressor unit (INCU) consisting of three nitrogen compressors, NC4-1, NC4-2 and NC4-3.

How is nitrogen stored in a cryo-turbine?

After cooling by methanol and propane, the high-pressure energy storage nitrogen (stream 46) is expanded in cryo-turbine and enters the liquid nitrogen tank (LNT). In the LNT, the liquid nitrogen is stored, and the gaseous nitrogen is extracted as the reflux nitrogen (stream 48) to be re-compressed in the INCU.

Which nitrogen compressors are shared by ASU and ESU?

As described in Chapter 2 on AS-LNES-WHSM, during the energy storage process, nitrogen compressors (NC1 and NC2) are shared by ASU and ESU; during the energy release process, the compressor inlet of ASU nitrogen compressors is reduced.

How adsorbent can be used as a substitute for CNG and LNG?

Under the conditions of high temperature and low pressure, the adsorbent can take advantage of its porous and large surface area to absorb natural gas, and obtain absorbed natural gas (ANG) as a substitute for CNG and LNG. ANG effectively increases the volumetric energy density of natural gas and can be integrated into a small device.

How does a waste nitrogen pipeline work?

In the waste nitrogen pipeline, part of the waste nitrogen is heated by the electric heater (EH) for heat-blowing, and the rest is sent to the precooling and purification system for cold-blowing [34, 35]. Below the waste nitrogen outlet on LPC, argon-rich air (stream 29) is fed to the argon distillation system.