Expander pressure energy storage

What is a gas expander?

These expanders put the cold-producing qualities of gas expansion and its power potential to work in your process – in applications ranging from gas processing, LNG, and petrochemicals to hydrogen liquefaction and power generation. Significant experience with expander solutions for gas expansion, sCO2, liquid, or flashing liquids.

What are the benefits of installing expanders?

Expanders can take advantage of pressure reductions to drive rotating machines. Information on how to assess the potential benefits of installing expanders is provided here

How does a compressed air expander work?

The technology uses electricity to compress and store ambient air under pressure in subterranean reservoirs, such as caverns and salt mines. When power is required, compressed air is drawn through the expander to power a generator. It is also possible to incorporate thermal storage or peaker plants to improve round-trip efficiency.

How does energy storage work?

As shown in Fig. 1, in this method, in the energy storage stage, the pump transfers water from the water reservoir to the water tower tank using the energy generated by the turbo-generator installed in the gas pressure reduction station.

What is the best energy storage method based on water pumping?

3.2.1. Energy analysis of energy storage system based on water towers Energy storage in a water tower is a special method of pumped-hydro energy storage system. This energy storage mechanism proposed in this research is the best energy storage method based on water pumping for a gas pressure reduction station.

What are expanders used for?

For compressible fluids (gases), expanders are the appropriate machine. Expanders are a mature technology with a host of successful applications, such as fluid catalytic cracking (FCC), refrigeration, natural-gas city gate-valve stations, air separation or off-gas venting, to name a few.