Specifications of energy storage airbag

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.

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.

How much energy is stored in a 1/4 downscaled airbag?

A suspension test for the model was performed to evaluate the displacement and storage volume. 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.

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

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.