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phil		 Tell me how to calculate remaining LPG in the tank? View All


2 days ago - 2 weeks left to answer. - 1 response - Report Abuse
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james.u
 can think of 3 ways that should work:
1. weighing it accurately when the tank when full, then compare to remaining weight.
2. Most of the LPG in the tank is liquid, so maybe ultrasound could be used to find the level. Some of the LPG evaporates as needed to maintain the pressure in the tank. The denser liquid goes to the bottom of the tank, and the lighter gas floats to the top.
3. Clever mechanical methods should work; since liquid has higher density reactions to accelerations would vary. Could try to measure tank CG or moments of inertia at different orientations, or when spinning. I think a shaker with strain gauge sensors to see the effect of the liquid as it moves back and forth would be the best best.


Measuring the pressure won't work, because as long as some liquid remains, the pressure will be determined by the temperature and the LPG composition, which varies (butane and propane have different partial pressures).

Thermal effects unlikely to work: for example chill

1 day ago

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