Question

List three things for following types of calculations: (1) conservation equation should be steady-state or unsteady-state, (2) conservation equation should be macroscopic or microscopic (differential), (3) what kind of conservation equation (e.g., mass balance) or equations should be used,

Calculating the force a curved water pipe exerts on its bracket at the highest flow rate.

Calculating the power required to pump benzene into an elevated tank.

Calculating the time required for a hot reactor to cool after it is shut down.   

Calculating the heat loss rate from an insulated petroleum pipeline on a cold day.  

Calculating the operating line equation for an absorption column.

Calculating the time required for a full water tank to drain completely.

Answer 1

1.Calculating the force a curved water pipe exerts on its bracket at the highest flow rate.

a.conservation equation should be steady-state

b.conservation equation should be microscopic

c.kind of conservation equation-momentum balance

2.Calculating the power required to pump benzene into an elevated tank.

a.conservation equation should be steady-state

b.conservation equation should be microscopic

c.kind of conservation equation-energy balance

3.Calculating the time required for a hot reactor to cool after it is shut down.

a.conservation equation should be unsteady-state

b.conservation equation should be macroscopic

c.kind of conservation equation-heat balance

4.Calculating the heat loss rate from an insulated petroleum pipeline on a cold day.

a.conservation equation should be steady-state

b.conservation equation should be microscopic

c.kind of conservation equation-heat balance

5.Calculating the operating line equation for an absorption column.

a.conservation equation should be steady-state

b.conservation equation should be microscopic

c.kind of conservation equation-material (mass and component)balance

6.Calculating the time required for a full water tank to drain completely.

a.conservation equation should be unsteady-state

b.conservation equation should be macroscopic

c.kind of conservation equation-momentum balance

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