hi
i am currently doing crude terminal storage project.
i have some dout
we have the crude oil storage tank 72500m3,hw to find the diameter and height of the tank and also hw to find out the HHLL,HLL,LLL
THANKS
Kannan
Full Version: Tank Process Design
QUOTE (chemicalkannan @ Feb 1 2008, 10:10 PM) 
we have the crude oil storage tank 72500m3,hw to find the diameter and height of the tank and also hw to find out the HHLL,HLL,LLL
Kannan,
You have great latitude in determining the dimensions of your tank. You will want to select, from among the infinite number of possibilities, that which is lowest cost while not compromising on safety or performance issues. Tanks are built from steel plates which are shaped then welded to construct the tank. In the USA, 8 foot wide plate would be a common dimension, so you might strive to use a tank height that requires an even number of plates. Depending on the liquid, temperature, and other factors, costs will increase as the height is increased, and a some point you reach the "point of diminishing returns". Beyond that, costs tend to steeply rise, and another strategy to increase capacity would be sought. The situation is similar in tank diameter. Talk to tank fabricators and designers for some more specific recommendations.
Just offhand looking at the volume of your tank, you might want something like a 15m high x 80m diameter tank. Neither dimension seems outrageous to me, and it provides about the needed volume. It's not so high or so wide as to cause disproportionately high costs.
Level alarm and shutdown setpoints should be set considering the amount of time you think is reasonable to allow your operators to perform effective changes to bring the tank's inventory intot he desired range. LL level alarms should be adequate to allow a feed pump to continue operating at its design flowrate without loss of suction.
HTH,
Doug
THAK YOU FOR YOUR VALUBLE COMMENTS
KANNAN
Kannan,
You have great latitude in determining the dimensions of your tank. You will want to select, from among the infinite number of possibilities, that which is lowest cost while not compromising on safety or performance issues. Tanks are built from steel plates which are shaped then welded to construct the tank. In the USA, 8 foot wide plate would be a common dimension, so you might strive to use a tank height that requires an even number of plates. Depending on the liquid, temperature, and other factors, costs will increase as the height is increased, and a some point you reach the "point of diminishing returns". Beyond that, costs tend to steeply rise, and another strategy to increase capacity would be sought. The situation is similar in tank diameter. Talk to tank fabricators and designers for some more specific recommendations.
Just offhand looking at the volume of your tank, you might want something like a 15m high x 80m diameter tank. Neither dimension seems outrageous to me, and it provides about the needed volume. It's not so high or so wide as to cause disproportionately high costs.
Level alarm and shutdown setpoints should be set considering the amount of time you think is reasonable to allow your operators to perform effective changes to bring the tank's inventory intot he desired range. LL level alarms should be adequate to allow a feed pump to continue operating at its design flowrate without loss of suction.
HTH,
Doug
KANNAN
QUOTE (djack77494 @ Feb 4 2008, 02:47 PM)
QUOTE (chemicalkannan @ Feb 1 2008, 10:10 PM)
we have the crude oil storage tank 72500m3,hw to find the diameter and height of the tank and also hw to find out the HHLL,HLL,LLL
Kannan,
You have great latitude in determining the dimensions of your tank. You will want to select, from among the infinite number of possibilities, that which is lowest cost while not compromising on safety or performance issues. Tanks are built from steel plates which are shaped then welded to construct the tank. In the USA, 8 foot wide plate would be a common dimension, so you might strive to use a tank height that requires an even number of plates. Depending on the liquid, temperature, and other factors, costs will increase as the height is increased, and a some point you reach the "point of diminishing returns". Beyond that, costs tend to steeply rise, and another strategy to increase capacity would be sought. The situation is similar in tank diameter. Talk to tank fabricators and designers for some more specific recommendations.
Just offhand looking at the volume of your tank, you might want something like a 15m high x 80m diameter tank. Neither dimension seems outrageous to me, and it provides about the needed volume. It's not so high or so wide as to cause disproportionately high costs.
Level alarm and shutdown setpoints should be set considering the amount of time you think is reasonable to allow your operators to perform effective changes to bring the tank's inventory intot he desired range. LL level alarms should be adequate to allow a feed pump to continue operating at its design flowrate without loss of suction.
HTH,
Doug
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