Thread: Gas science?

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If the tank is sealed then any evaporation would condense at night, (when it cools) and the positive pressure would help to pump.

And, over the course of a year, assuming the gas is pumped from the above ground tank, a definitive percentage of profit would be achieved.

The real key here is, as was mentioned earlier, gas is stored in underground tanks where the temperature doesn't vary too much. The fact that it expands or contracts a bit when it's in your tank doesn't mean squat because you've already paid for it.