If the 1000L vessels you are talking about are being filled on site then you lose nothing as the new fill is simply being added to the vessel and you are charged by meter for what leaves the truck. If the unit is hauled away and then refilled at the gas supplier, the supplier charges you for...
You are wise to notice this could be a problem. Small tanks fill quickly and some even at the rates you described (200 GPM and 350 psi). Most of the trucks are lower than that but the hydraulic units can achieve these numbers. The fact that the vessel is a 250 psi unit helps. If this were a...
I'm with JOHNPIA2 here. Even at list price commercially available LOX is running in the neighborhood of $5 per gallon. Add another $50 per month for the rental of the container. You stated that your budget is small; save yourself a lot of money, time, and maybe your life and that of others -...
Unless you let your storage system (dewar or ?) come up to ambient temperature, the "water" will stay suspended as ice floating around in the LN2. Even if you drain your dewar, it will stay below the freezing point of water for quite a while. The ice particals are probably so small...