Calculating SCUBA Tank Air Consumption for Offshore Oil Rig Maintenance

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The discussion focuses on calculating the air consumption of SCUBA tanks for divers working at a depth of 15 meters on an offshore oil rig. The divers consume 130 liters of air at a temperature of 10°C, and the atmospheric pressure is 101,325 Pa. Participants clarify that the pressure at this depth is gauge pressure, calculated using the formula P = density * g * h. Despite some initial calculations, users express difficulty in arriving at a reasonable answer for the fraction of tank air mass consumed per job. Accurate calculations are essential for planning effective underwater maintenance schedules.
alexparker
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Homework Statement


You are designing an underwater maintences schedule for an offsore oil rig. The Divers work at a depth of 15m and the seawater Denisty is 1027Kgm^-3. They Are know to Consume 130L of air at the ambient temperature of 10C over the time to do the job. Atmospheric pressure is 101325Pa. Each Full SCUBA diving tank contains 3Kg of air.

What Fraction of the tank air mass will be consumed on each Job


Any help would awesome. Thanks
 
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So far i have Found the Pressure at 15m using
P=(density)*g*h (quick question is this Absoulte or gage, not quite sure for under water)
 
Hey, I am having the same problem!
 
alexparker said:
So far i have Found the Pressure at 15m using
P=(density)*g*h (quick question is this Absoulte or gage, not quite sure for under water)

I thinks it is gage pressure
 
Use this to check your calculations pressure under water
 
Yeah it was gage.

still can't get a resonable answer however
 

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