H2REF Webinar Questions and Answers
1. What is the expected cycle life of the bladder accumulator?
(see webinar for more detailed response)
There are 2 parts to consider in the bladder accumulator cycle life, the Shell and the bladder.
The shell base assumption are
Medium pressure – Expectation is over 15 year life – based on 20 cycles per day (based on 365 days), 2 ½ cycles per refuellings = around 275,000 Cycles
High pressure – Expectation is over 15 year life – based on, 20 cycles per day (based on 365 days), 1 cycles per refuellings = around 110,000 Cycles
The same bladder is in both the medium and high pressure vessels.
The bladder is classed as a consumable part with an expected life of around 2 years (subject to volumetric ratio applied)
Target – 35,000 cycles– based on 20 cycles per day (based on 365 days), 2 ½ cycles per refuellings = around 36,500 Cycles
2.What happens if there is a bladder failure?
(see webinar for more detailed response)
The bladder has been identified as a potential risk in the system and as such mitigating solutions have been put in place.
N.B. It is important to note that if there is a failure in the bladder that because there is balanced pressure on either side of the bladder the oil will not be rushing into the gas side, more that the gas will defuse into the oil, which will be identified on the Hydraulic side via;