Ihv energy storage device with air bag

What is an energy bag?

An Energy Bag is a cable-reinforced fabric vessel that is anchored to the sea (or lake) bed at significant depths to be used for underwater compressed air energy storage. In 2011 and 2012, three prototype sub-scale Energy Bags have been tested underwater in the first such tests of their kind.

Can energy bags be used for underwater compressed air storage?

Conclusions This paper has described the design and testing of three prototype Energy Bags: cable-reinforced fabric vessels used for underwater compressed air energy storage. Firstly, two 1.8 m diameter Energy Bags were installed in a tank of fresh water and cycled 425 times.

What is compressed air energy storage?

Compressed air energy storage (CAES) is an energy storage technology whereby air is compressed to high pressures using off-peak energy and stored until such time as energy is needed from the store, at which point the air is allowed to flow out of the store and into a turbine (or any other expanding device), which drives an electric generator.

Are energy bags ready for deployment?

However, as a result of the tests presented in this paper, Energy Bags are now well understood, well developed, and proven in real-world conditions, and are ready for deployment at larger scales within a pilot underwater compressed air energy storage plant.

What is a uhpv energy bag?

There are obvious similarities between the adopted UHPV Energy Bag design and underwater lift bags (as shown in Fig. 6), which are inflatable fabric bags used for underwater salvage lifting and which are also often used as water load test weights.

How do energy bags work during deflation?

During deflation, the air was released straight to atmosphere, as the aim of the test was just to exercise the Energy Bags and assess their design; obviously the high-pressure air released from an Energy Bag in an energy storage plant would enter an expander-generator set to generate electricity. Fig. 11. Pressure vs. time for the two bags.