8. It is common practice to use elevated reservoirs to maintain the pressures in municipal water supply systems. Such a system is illustrated below. If the pressure in the pipeline is to be maintained in the range of 350-50o kPa and the reservoir is not to be less than half full. The pressure in the air above the tank is maintained at atmospheric pressure. a. Calculate the height of the water when the reservoir is half full and when the reservoir is full. b. Estimate the height of the midpoint of the reservoir above the pipeline and the minimum required space between the midpoint and the top of the reservoir. Vent Elevated storage reservoir Air, Water Pipeline Flow Flow
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
- It is common practice to use elevated reservoirs to maintain the pressures in municipal water supply systems. Such a system is illustrated below. If the pressure in the pipeline is to be maintained in the range of 350–500 kPa and the reservoir is not to be less than half full. The pressure in the air above the tank is maintained at atmospheric pressure.
- Calculate the height of the water when the reservoir is half full and when the reservoir is full.
- Estimate the height of the midpoint of the reservoir above the pipeline and the minimum required space between the midpoint and the top of the reservoir.
(see image for diagram)
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