Epe energy storage airbag

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.

Are energy bags a cost-effective energy storage system?

The Energy Bag was re-deployed and cycled several times, performing well after several months at sea. Backed up by computational modelling, these tests indicate that Energy Bags potentially offer cost-effective storage and supply of high-pressure air for offshore and shore-based compressed air energy storage plants. 1. Introduction

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 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.

How much energy does an airbag store?

The airbag was hung and filled with water, and its volume was measured to be approximately 0.465 m 3. The maximum energy stored in the 1/4 downscaled airbag was approximately 9.3 kJ, determined by the product of the maximum volume and rated pressure. A 4 m prototype at a depth of 700 m can store an energy of 210 MJ, i.e., approximately 58.3 kW·h.

How much energy does an energy bag store?

With regard to stored energy, an Energy Bag with height of 40 m and maximum diameter of 40 m (and a volume of 35,705 m 3) would store 200 MWh if anchored at 500 m depth, assuming the most pessimistic expansion strategy was used.