| Topic : Challenges in power sector |
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Activity:
Question posted: 10 24 2009 10:25:06 +0000,
4 answers, 652 views, last activity
07 06 2010 20:18:08 +0000
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WATER IS TO PUMPED AT THE RATE OF 500 TONS PER HOUR TO A HEIGHT OF 3 M
WOROUT POWER . SHOW ME THE CALCULATION
500 tonnes=500*1000=500000 kgs (taking specific gravity for water =1000Kg/metre cube
therefore Power required to move it to 3 mt height= 500000*9.81*3/3600 =14715000/3600=4087.5 Watt=4.0875 kW
Now 1 hp=746 watt or .746 kW; Therefore HorsePower required=4.0875/.746=5.4792225 ~5.48 Hp
ALL 3 REPLIES ARE DIFFERENT WHY ? ... TELL ME BY CALCULATION SPEED OF FREE BOAT IN WHICH THE PUMP IS MOUNTED WITH INLET IN FRONT, OUTLET AT REAR TAKE INLET AS 1000 MM DIA PIPE & OUTLET PIPE AS 900 MM DIA TAKE NOSE RESISTANCE IS ZERO 140 LPS ; 8400 LPM 500 T/Hr CROSS XN AREA= PI/4*0.9*0.9= 0.636 SQM VELOCITY= 8400/0.636= 13,207 M/Mt=792 KMPH TRANSFER HP = 500*792/25=15,840 HP
The simple / easy reference, I found is ......
500 TONS OF WATER or 500000 KGS or 500000 LTRS PER HR
(Taking SP. GR. as 1 KG / LTR)
HT or LIFT = 3 MTRS
Theoretical HP = 500000 / 60 (PER MIN.) * 3 / 4500 = 5.56
ACTUAL HP =
5.56 * 4 = 22.22 ... (1) (Taking efficiency as 25 %)
22.22 * 1.25 = 27.78 ... (2) (Taking frictional losses and additional work from sump bottom to suction head)
So Total ACTUAL HP = 27.78
Source :
http://www.indiawaterportal.org/ask/6916
Other sources are given below :
http://www.gemi.org/waterplanner/calc-horsepower.asp
http://www.engineering.com/calculators/water_pump.htm
http://www.geocities.com/Eureka/Concourse/3075/efficiency.html
http://www.fixya.com/support/t976828-pump_size_calculate
http://www.mcnallyinstitute.com/16-html/16-12.ht
http://www.gemi.org/waterplanner/excel/GEMI-Equations-Tool.xls
When water the power is at 10 or 20 KW water is pumped at the speed of 600-1000 litres/hr, the amount of force generated pushes the water of speed 1000 litres/hour at 1 m hight, 900 litres/hour at 2m height and 800 litres/hour at 3m height.
Please refer to this website...
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reciprocate |
GLOBAL FUEL USED, SAVED TECHNOLOGY AUTOMOTIVE, RAIL, SHIP, FERRY, VLCC OIL Used 12 MnT/Day=4320 MnT/Yr. CO2e=12,528 MnT/Yr COAL Used 9 MnT/Day=3240 MnT/Yr. CO2e=12,528 MnT/Yr GLOBAL CO2e= 25 BnT/Yr….ANDY CO2e=25/3=8.33 BnT/Yr GLOBAL COOLING CER... |
GLOBAL FUEL USED, SAVED TECHNOLOGY AUTOMOTIVE, RAIL, SHIP, FERRY, VLCC OIL Used 12 MnT/Day=4320 MnT/Yr. CO2e=12,528 MnT/Yr COAL Used 9 MnT/Day=3240 MnT/Yr. CO2e=12,528 MnT/Yr GLOBAL CO2e= 25 BnT/Yr….ANDY CO2e=25/3=8.33 BnT/Yr GLOBAL COOLING CER... |