The optimum diameter for the pipe.
Explanation of Solution
Given:
The mass flow rate is
The length of the pipe is
The friction factor is 0.015.
Total life is 30 years.
Electricity cost is
Overall pump efficiency is 80%.
Initial cost is
Calculation:
Apply energy equation,
The volume flow rate is,
The head loss is,
The power required by the pump is,
The electric power used for one year is,
The energy cost for one year is,
The installation cost per year is,
The total annual cost is,
For the optimum cost,
Thus, the optimum diameter of the pipe is
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Chapter 14 Solutions
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