Compressed Gas and Air - Storage Volumes
Calculate the storage volume of compressed air or gas
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The storage volume for a compressed gas can be calculated using Boyle's Law:
pa Va = pc Vc (1)
where
pa = atmospheric pressure (14.7 psi, 101.325 kPa)
Va = volume of the gas at atmospheric pressure (cubic feet, cubic meter)
pc = compressed pressure (psi, kPa)
Vc = volume of the gas at compressed pressure (cubic feet, cubic meter)
Volume of free gas in a Storage Volume
The amount of free gas at atmospheric pressure in a given volume as a cylinder storage can be calculated my modifying (1) as:
Va = pc Vc / pa (2)
Gas can be stored in high-pressure cylinders ranging to 6000 psig (410 bar), normal-pressure cylinders ranging between 2000 and 2500 psig (140 and 175 bar) and low-pressure cylinders ranging up to 480 psig (34 bar).
Example - Volume of Air in a Cylinder Storage
The standard atmospheric air in a 250 cubic feet cylinder at 2000 psig (2014.7 psia) can be calculated as:
Va = (2014.7 psia) (250 cu ft) / (14.7 psig)
= 34264 (cu ft)
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Related Topics
- Gas and Compressed Air - Gas properties, capacities of pipelines, sizing of relief valves - air, LNG, LPG and more
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