2. Two pumps are being considered for a pipe system. Table P4.39 shows the economic and operating parameters of each pump. The fluid being transported in the system is a 30% propylene glycol solution. The propylene glycol is flowing at 300 gpm with an average temperature of 40°F. At this condition, the head required from the pump is 37 ft. The system operates continuously all year long with an estimated 10% downtime for maintenance and repair. The cost of electricity is $0.11/kWh. The system is expected to last for 30 years and provide a rate of return of 18%. Determine which pump provides the best economic advantage for this application. TABLE P4.39 Economic and Operating Parameters for Pumps A and B Pump Initial Cost ($) Efficiency A $4,700 0.66 $5,500 0.71
2. Two pumps are being considered for a pipe system. Table P4.39 shows the economic and operating parameters of each pump. The fluid being transported in the system is a 30% propylene glycol solution. The propylene glycol is flowing at 300 gpm with an average temperature of 40°F. At this condition, the head required from the pump is 37 ft. The system operates continuously all year long with an estimated 10% downtime for maintenance and repair. The cost of electricity is $0.11/kWh. The system is expected to last for 30 years and provide a rate of return of 18%. Determine which pump provides the best economic advantage for this application. TABLE P4.39 Economic and Operating Parameters for Pumps A and B Pump Initial Cost ($) Efficiency A $4,700 0.66 $5,500 0.71
Chapter1: Making Economics Decisions
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Transcribed Image Text:2. Two pumps are being considered for a pipe system. Table P4.39 shows the economic and
operating parameters of each pump. The fluid being transported in the system is a 30% propylene
glycol solution. The propylene glycol is flowing at 300 gpm with an average temperature of
40°F. At this condition, the head required from the pump is 37 ft. The system operates
continuously all year long with an estimated 10% downtime for maintenance and repair. The cost
of electricity is $0.11/kWh. The system is expected to last for 30 years and provide a rate of
return of 18%. Determine which pump provides the best economic advantage for this
application.
TABLE P4.39
Economic and Operating Parameters for Pumps A and B
Pump
Initial Cost ($)
Efficiency
A
$4,700
0.66
В
$5,500
0.71
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