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Choose the type of storage reservoir where the liquid is maintained under high pressure.

Choose the type of storage reservoir where the liquid is maintained under high pressure. Correct Answer hydraulic accumulator

Explanation:

Hydraulic accumulator:

  • Hydraulic accumulators are energy storage devices. Analogous to rechargeable batteries in electrical systems, they store and discharge energy in the form of pressurized fluid and are often used to improve hydraulic-system efficiency.
  • An accumulator itself is a pressure vessel that holds hydraulic fluid and a compressible gas, typically nitrogen. The housing or shell is made of materials like steel, stainless steel, aluminum, titanium, and fiber-reinforced composites. Inside, a moveable or flexible barrier—usually a piston or rubber bladder—separates the oil from the gas.
  • In these hydropneumatic units, hydraulic fluids only compress slightly under pressure. In contrast, gases can be compressed into smaller volumes under high pressures, and engineers take advantage of this property in accumulator design and application. In essence, potential energy is stored in the compressed gas and released on demand to force oil from the accumulator and into a circuit.
  • To use the device, the gas volume is first precharged—generally to around 80 to 90% of the minimum system working pressure. This expands the gas volume to fill most of the accumulator with only a small amount of oil remaining inside. In operation, the hydraulic pump raises system pressure and forces fluid to enter the accumulator.
  • The piston or bladder moves and compresses the gas volume because fluid pressure exceeds the precharge pressure. This is the source of stored energy.

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