How is the nitrogen filling pressure for the accumulator determined?
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I would like to ask the experts: In compression refrigeration, given the pressure in the oil pipeline, how can the nitrogen pressure in the accumulator located on that pipeline be determined? It is known that the pressure in the control oil line is 0.93 MPa, and the pressure in the lubricating oil line is 0.28 MPa.
Reply to 1# mengwenyuan: Determination of inflation pressure: The inflation pressure can be based on the following values: (1) Impact buffering: Use the usual pressure at the setting point of the accumulator, or a slightly higher pressure, as the inflation pressure； (2) Pulsating damping: Use 60% of the average pulsating pressure as the inflation pressure ； (3) Energy storage: The inflation pressure should be set within the range of 90% below the system’s minimum operating pressure (usually 60%-80%) and 25% above the maximum operating pressure ； (4) Thermal expansion compensation: The lowest pressure in the closed loop of the hydraulic system, or a pressure slightly lower than that, is used as the inflation pressure.
The answer upstairs is quite accurate; I’ve learned a lot, thank you
I didn’t pay attention to this issue; it seems that a pressure of 0.5 MPa was sufficient for our accumulator at that time.