That is an invention of Evolvingape "Rob" here on this forum, it is called HOP, Grumage made a replication and has a video of it working as a pistonless pump
Regards
Mike 
That is an interesting device, and may also assist in understanding of this aspect of electrolysis.
The reason this research is important:
Consider a situation in which the device i show in the sketch above were connected to a fuel-cell,
in such a manner that our hydrogen cycle efficiency approaches the 86% current technology maximum.
Harvesting the hydraulic energy could bring this technology closer to Unity.
(a pre-condition for achieving OU)
For instance, once the piston F/T variables have been determined for a given system,
the piston can be geared to a rotary flywheel and generator, (or geared linear actuator/solenoid generator)
and the resultant electricity added back into the system.
This gathered my attention again (after being shelved for a few years) due to industrial applications and the energy offset claims that may imply overunity at first glance. This being the energy required to compress electrolysis hydrogen and oxygen gasses for industrial production. It turns out that allowing pressure to build up in the electrolysis chamber, can offset a great deal of electricity consumed by the compressors. When compared to the electrolysis cycle alone, which holds up to claims of 90% efficient, the energy ‘saved’ by not having to compress the gas exceeds 20% of the energy used to produce the two gasses.
It is difficult for me to imagine that our compression technology is that drastically inefficient.
Investigation of this has shown me that comprehension/release of gas by modern standards
can have total system efficiencies (when carnot energy is accounted for) of 87%.
after going over the numbers of liquid to gas phases of water under varying conditions of starting pressure and temps
it seems that there may be circumstances in which the increase in pressure may give a 2-fuel-cell system
(one being reversed for electrolysis) a total system efficiency greater than 100%
I will take a stance of relativism on this issue, by saying that it is our perspective reference of 1ATM that makes this possible.
I dont want to confuse this issue, but there is also a negative pressure (with respect to 1ATM) that can occur in the reservoir that feeds the electrolysis chamber that could be further taken advantage of hydraulically.
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Topic: Energy from phase change pressure of water electrolysis (Read 1884 times)
