Thank you. That is helpful. I didn't know about the helium purge let alone 3 hours to unload.
The Cryo Hauler Thread
Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by Cali kid, Mar 16, 2023.
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length of time for hydrogen training depends on the trainees experience. If they are fresh with zero cryo experience yes it can be quite lengthy. Those who come from LIN, LOX, LAR, tend to pick it up quite fast. The main difference with LH2 is load and unloading times are a lot longer. Mainly because for the most part trailers and customer tanks are gravity/pressure loaded. So no pumps, another is the cooling and purging process has more steps as tank contamination is very important. Purging with helium is more for stack fires you don’t even typically see helium tanks on the new LH2 trailers. Lastly since LH2 is so much colder then the others (-423) the pressure spikes during and after offloading need to be understood and can vary drastically depending on customer/trailer tank size, liquid saturation, and liquid level.
The future is going towards making the offloading process automated, unfortunately I feel like this is going to take away from how much a driver understands. Some day a manual off loading/ loading driver will be a thing of the past and a driver will hook a hose and press a button. Us dinosaurs will probably become techs that get called when things go wrong and have to trouble shoot.
77fib77, Loose Caboose, sabresfan 76 and 3 others Thank this. -
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