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Sizing Hydraulic Accumlator for thermal expansion

Sizing Hydraulic Accumlator for thermal expansion

Sizing Hydraulic Accumlator for thermal expansion

(OP)
Thermal expansion (cold days) for contained volume in closed pipe between isolated valves required ~ 90 cu. inch volume for the coldest delta T. The opearting system pressure is 130 -150 psig. The hydraulic accumlator, which has bladder is recommended to be (by manufacturer) pre-charged with N2 around 100 psig.

My questions are:

(1) If the system pressure (130-150 psig)is more than pre-charge nitrogen bladder pressure (100 psig), will there be a room for thermal expansion in the bladder?

(2) Should the nitrogen-pre charge pressure be close to system pressure?

RE: Sizing Hydraulic Accumlator for thermal expansion

typically the N2 accumulators are precharged at roughly 50% of the operating pressure.

saludos.
a.

saludos.
a.

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