Objective : To Study that, DC pump has higher efficiency than AC pump.
Comparison between AC & DC pump:
As we have installed DC fans in our campus which are giving same output air as of AC fans gives, but the power consumption of DC fans are relatively lower than AC fans. So that we started thinking that, If DC fan gives high efficiency then we checked the efficiency of DC pump.
AC and DC pump were arranged with same input which was having same numbers of bends, length and height. There were 25 number of bends, 4 convergent and divergent joints, 4 T joints. The total head of the pipeline was 8 m. Comparison between two pumps was tested at ground level and peak height level and then got some results as follows:
AC Pump test readings:
When tested at peak level:
Observed Voltage: 240 V,
Observed Current: 3.59 A,
Volume of container: 20 liters,
Time required to fill the container: 22.76 sec
Thus for 1 sec: 0.86 liter water
therefore 52.17 LPM discharge observed on ground level for AC pump.
total power consumption 989 watt/ liter
When tested at ground level:
Observed voltage: 240 V,
Observed current: 4.37 A,
Volume of container: 20 liter
Time required to fill the container : 15 sec
thus 1.17 liters per sec discharge
total power consumption 787 watt/ liter
DC pump test readings:
When tested at ground level:
Observed voltage: 137 V,
Observed current: 6.37 A
Volume of container: 20 liter
Time required to fill the container : 17 sec
Thus for 1 sec: 1.17 liter water
total power consumption 573.76 watt/ liter
When tested at peak level:
Observed voltage: 139 V/ 99.7 V
Observed current: 4.9 A/ 6.37 A
Volume of container: 20 liter
Time required to fill the container : 17.85 sec
total power consumption 608 watt/ liter
Therefore, 989-608= 381 Watts saving/ liter for DC pump
Efficiency: 381/989*100= 38.52%
From the above comparative calculations we can see that DC pump consumes less power and gives more output than AC pump.
Thus, from the above readings we can say that DC water pump is 38% more efficient than AC water pump.
Business Plan:
Now a days, the societies in urban area have very huge storage tank at bottom to receive the water from municipal corporation, they need to pump that water into top mounted storage tanks to supply the water to all the flats. So they spend big amount of money for pumping the stored water at the bottom to the top most level container/ tank.
If we run the same test of AC & DC pump in their colony and insure them that by replacing the AC pumps with DC pumps how much amount of money they will save in a month then they will definitely buy the system as early as possible.
