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Principle of operation of gas-loaded accumulators

A gas-loaded accumulator is a device commonly used to store gas energy and release it when needed. The principle of operation is basically to use the compression and expansion of gases to store and release energy.

Compression phase: When energy needs to be stored in a working device (e.g. a hydraulic system), a gas-loaded accumulator compresses the gas inside the accumulator by means of an external force (e.g. hydraulic pressure). This results in an increase in pressure inside the accumulator and energy is stored in the form of compressed gas.


Stored energy: Once the gas has been compressed to a certain pressure, it is stored in the accumulator. The accumulator then acts as a vessel containing the compressed gas, which has the potential to be energized. This process is similar to the elastic energy stored in a spring when it is squeezed.


Release phase: When the work unit needs to release the stored energy, the accumulator opens the release valve. At this point, the compressed gas in the accumulator enters the system through the valve and pushes the work unit to perform the desired action. During this process, the gas expands, releasing the previously stored energy.


Cycling: Once the accumulator has released its stored energy, it can recompress the gas in preparation for the next round of energy storage and release cycling.
In summary, a gas-loaded accumulator stores and releases energy by compressing and releasing gas, thus fulfilling the function of providing power when needed. This type of device is typically used in systems that require periodic energy output or have a large variation in energy demand, such as construction machinery, hydraulics and braking systems.

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