The working principle of oil brake nitrogen energy storage

How a regenerative braking system works?

In such systems, a two-way flow of energy is possible. In one direction, energy is transferred from the pump and accumulator to the motor/pump. Conversely, the energy recovered from braking (regenerative braking) is transferred from the motor/pump to the hydraulic accumulator, where the potential energy can be stored.

What is the efficiency of regenerative braking and energy storage?

The efficiency of energy recovery, according to the efficiency values given for the hydraulic system, is 69% . The energy stored in the HPA is used to accelerate the propulsion system. Examples of general hydraulic propulsion with regenerative braking and energy storage in open-loop and closed-loop systems with HPA are shown in Figure 9.

Does liquid air/nitrogen energy storage and power generation work?

Liquid air/nitrogen energy storage and power generation are studied. Integration of liquefaction, energy storage and power recovery is investigated. Effect of turbine and compressor efficiencies on system performance predicted. The round trip efficiency of liquid air system reached 84.15%.

What is the pressure of nitrogen in a hydraulic accumulator?

When the fluid is pumped into an accumulator the nitrogen (N2) inside the accumulator is compressed. When all the hydraulic fluid is in an accumulator designed for high pressure side of an HHV, the pressure of the nitrogen reaches 5000 pounds per square inch (psi). If empty of fluid, the pressure of the nitrogen is about 2000 psi.

How does hydraulic system pressure affect nitrogen gas pressure?

It is important to note that hydraulic system pressure and nitrogen gas pressure are always in equilibrium. As this system pressure increases, the bladder and nitrogen gas continue to compress, which results in more hydraulic fluid being present in the accumulator.

How is nitrogen gas separated from hydraulic fluid?

In this type, the hydraulic fluid and nitrogen gas are separated by a synthetic rubber diaphragm. The gas is filled through the gas port under predetermining pressure.