How Heated Water and Compressed Air Generate Electricity

This patent describes a system that stores energy as compressed air and generates electricity by injecting that air into heated water, creating an upward flow that drives a hydro-electric turbine.

What it covers

The system stores energy by compressing air. To generate electricity, this compressed air is injected into a "riser tube" submerged in a "water collecting tank" (Claim 1). The air forms bubbles, which makes the water less dense and causes an "upward flow" of water and bubbles (Claim 1). This moving water then drives a "hydro-electric power system" to produce electricity (Claim 1). A key feature is a "water heating system" that warms the water in the tank to a temperature higher than the surrounding air, which helps make the process more efficient (Claim 1). For example, solar panels can be used to heat the water (Claim 3).

What it doesn't cover

• —Systems that generate electricity from compressed air without using an airlift pumping mechanism.
• —Airlift pumping systems that do not include a water heating system to warm the collecting water to a temperature above ambient air.
• —Energy storage systems that use a gas other than compressed air to drive the electricity generation process.
• —Electricity generation from compressed air where the compressed air is not utilized at a temperature greater than ambient air.
• —Hydro-electric systems not specifically driven by the upward flow of water mixed with injected air bubbles.

The clever bit

The novelty lies in combining compressed air energy storage with an airlift pumping system where the collecting water is actively heated. Heating the water increases the efficiency of the airlift pump, allowing more electricity to be generated from the same amount of compressed air than if cold water were used.

Why it matters

This technology addresses the challenge of storing energy from intermittent sources like solar and wind power. By storing energy as compressed air and then efficiently converting it back to electricity, it can help stabilize power grids. Systems like this are important for ensuring a reliable supply of clean energy when renewable sources are not actively generating.

Real-world examples

• 1.Large-scale grid energy storage facilities
• 2.Renewable energy integration projects
• 3.Compressed Air Energy Storage (CAES) plants