Solution

10ft carbon tetrachloride (specific gravity = 1.4)

10ft gauge pressure reading water carbon tetrachloride (specific gravity = 1.4)

gauge pressure reading

CLM.5 STORAGE TANK CALCULATION

Since the density of air is effectively zero, the contribution of the air to the 3-ft manometer reading can be neglected. The contribution to the pressure due to the carbon tetrachloride in the manometer is found by using the hydrostatic equation.

Since the right leg of the manometer is open to the atmosphere, the pressure at that point is atmospheric:

Note that this should be carried as a positive term.

The contribution to the pressure due to the height of water above the pressure gauge is similarly calculated using the hydrostatic equation.

The pressure at the gauge is obtained by summing the results of the steps above, but exercising care with respect to the sign(s):

P= 14.7- 1.82+ 1.3 = 14.18 psia = 14.18 - 14.7 = -0.52 psig

The pressure may now be converted to psfa and psfg:

P = (14.18) (144) = 2042 psfa = (-0.52) (144) = -75 psfg

Care should be exercised when providing pressure values in gauge and absolute pressure. The key equation is gauge) = /'(absolute) — /'(ambient) (consistent units)

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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