Horizontal cylindrical tank volume calculator
Lets say this SCP will output to N7:0 So now N7:0 = PSI Inches of water column can be calculated with a known PSI and specific gravity of the liquid. (PSI of a liquid can be calculated in a linier manner so you could use an SCP instruction to scale the raw input value of the pressure transducer and scale it to PSI. If pressure transducer would work then it would give you PSI. But basically your tank size is a constant, so the main variable that will change in the equation is: What level is the liquid in the tank. lol I would agree that this is pretty confusing and higher math is not a strong point of mine either. So we are just killing fish not terrorist. Not on a military vessel, just a large At Sea Fishing Trawler / Processor. Hi Mark, Thanks for your kind comment's, although I am not really doing anything for you out here unless you eat a lot of fish. Anyway keep up the good fight, and please let us know how it turns out. We have a system that shoots a burst of air into the tank and a measurement is calculated from that. Also just a thought, is the pressure transducer you are using classified for hazardous locations / rated to be submerged in Jet Fuel? Onboard the ship I work on we are subject to a very strict criteria as to what we can and cannot use to measure level in our fuel tanks. Is the tank vented to atmospheric pressure or is it a sealed tank under pressure? What temperature fluctuations will the liquid in the tank be subject too? Is the tank perfectly level or slightly tilted toward the suction line of a pump? And as TConnolly pointed out the tank is probably not a perfect cylinder. From the reading I have done you will still have many factors that come in to play and can add variables to your calculation if your measurements have to be exacty precise. Hopefully others will be able to help you with specific questions, as I am still trying to wrap my head around this, its interesting though. Calculate WC from psi: Formula for Calculating Volume: Then you will still need to convert cubic inches into gallons. Here are a couple of links I found, hope they will help you out. The more readings (intervals) in the dip readings, the more accurate the final result.Hello, The math on this one makes me crosseyed, once you get into a totally non linier vessel it seems to get very complicated. The PLC can then interpolate between the "above" and "below" readings using a look-up algorithm. Concentrate more readings where the height changes most rapidly versus height. This method is independent of the density of the product. produce a "dip-table" by filling through a certified flowmeter, recording the liquid height at predetermined intervals. Of course this is only applicable to contents that have a constant density (weight per volume).Ģ. The PLC simply has to determine volume dependent on the density of the contents. mount the vessel on load cells, and use the weight to determine the volume. If accuracy is important (critical in some industries), then there are 2 methods which can produce accurate results.ġ. In your case you haven't specified whether your tank is tilted, most are, and where the height transducer is located (which does make a difference if the tank is tilted).
Very rarely are tanks perfectly "cylindrical", very rarely are they the diameters specified on the design drawings, and things do get massively complicated with dished ends, tilted tanks, conical bottoms, and "inclusions" such as mixer paddles, heat-exchanger coils etc. Whilst the maths may require inverse trig functions, none of the formulae are that complicated for a simple cylinder with flat ends.īut I have to make the point that working from the stated (or even measured) tank dimensions is not going to give the best accuracy. To be honest, given the lack of detail provided, your post looks like a homework assignment.