Solar Pump
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SOLAR PUMP
INTRODUCTION SOLAR SYSTEM CONSISTING EQUIPMENT P V ARRAY PUMP MOTOR CONTROLLER BATERRY
FUNCTION P V ARRAY -It depends on radiation and temp. -it has current-voltage characteristics. PUMP - hydraulic machines which convert mechanicalenergy into hydraulic energy. e.g. centrifugal pump, piston pump.
FUNCTION MOTOR -to rotate the shaft of the pump. -linking with current ,voltage ,torque characteristics. CONTROLLER -it isolate p v array & give optimum i-v sitecondition to pump motor.
FUNCTION BATTERY - it storage electricity. -no output from p v array battery can use to drive the motor.
Working -principal
TECHNOLOGY Submerged multistage c.f. pump-set. Submerged pump with surface mounted motor. Reciprocating positive displacement pump. Floating pump-set. Surface suction pump-set. Solar thermal pumping system according to an organic rankine cycle. Solar pumping with stirling engines.
Solar thermal pumping system according to an organic rankine cycle (orc)
Reciprocating positive displacement pump
comparision of pumping techniques. Advantage
Dis-advanage
Wind-pump
-Un-attended operation. -easy maintanance. -long life.
-water storage require for low wind periods. -high system design.
Solar-pump
-unattended operation. -low maintanance. -long life.
-high capital cost. -water storage require for cloudy periods. -skill persons require.
Hydraulic-pump -unattended operation -easy to maintain -long life.
-require specific site condition.
Diesel & -quick & easy install gasoline pump -low capital cost -widely used
-short life. -noise & fume pollution. -high maintanance cost.
Energy demand for water pumping DH = (Dwell + Dhdyn) + (DHadd + Dhloss) (m ) -------------(1)
EHYD = kSC ´ g ´ r ´ V ´ DH [kWh, V in m3] --------------(2a) kSC = 1/3600 [converting kJ to kWh]
EHYD = KSC ´ V ´ DH [kWh] -------------
(2b)
KSC = 1/367 [introducing also g and r as constants] PHYD = KSC ´ V¢ ´ DH [kW] ------------------- (3)
PSOL >> PEL > PHYD [kW] ------------------- (4) hPV = PEL/PSOL [PV system efficiency] -
(5a)
hSYS = PHYD/PEL [ (hydraulic) efficiency] (5b)
hTOT = hPV ´ hSYS[overall efficiency of the PV pumping set] ----------------------------------- (5c) 0.1 < hPV < 0.15. 0.35 < hSYS < 0.65 0.03 < hTOT < 0.1.
Performance data of pump types APPLICATION
SIZE OFELEC. MOTOR
C.F. PUMP
DISP PUMP
Low head pumping
250..>1200
+
*
OTHER AVG. SYS. EFF.
BEST SYS. EFF.
-
>0.35
>0.55
Up to 0.7
Drinking water supply (a) 150..>800 small size system With D.C.motor
*
+
*
0.3…. 0.4
Drinking water supply (b) Large system with A.C.motor
+
*
*
>0.35 >0.6
*
*
+
<0.45
700…5000
High water head pumping 450…>2000
<0.7
Performance data & cost OUTPUT HEAD (m) m3/day isolation
SOLARARRAY (Wp)
System price US $ FOB
Submerged bore hole motor pump
40 25
20 20
1200 800
7000-8000 6000-7000
Surface motor / Submerged pump
60
7
840
5000-6000
Reciprocating +ve disp. pump
6
100
1200
7500-9000
Floating motor/ pumpset
100 10
3 3
530 85
4000 2000
ATERNATIVE DESIGN & ITS DRAW-BACK There are two ways using solar power to solar-pump - directly connecting the solar panel to the pump. - charging the battery with solar-panel and then using the battery to run the pump. Draw-backs -if the pump is directly power to the solar panel then water can only the pumped when the sun is shining. -charging the battery first and then using that to run.
APPLICATION Village water supply Livestock watering Irrigation
INTRODUCTION SOLAR SYSTEM CONSISTING EQUIPMENT P V ARRAY PUMP MOTOR CONTROLLER BATERRY
FUNCTION P V ARRAY -It depends on radiation and temp. -it has current-voltage characteristics. PUMP - hydraulic machines which convert mechanicalenergy into hydraulic energy. e.g. centrifugal pump, piston pump.
FUNCTION MOTOR -to rotate the shaft of the pump. -linking with current ,voltage ,torque characteristics. CONTROLLER -it isolate p v array & give optimum i-v sitecondition to pump motor.
FUNCTION BATTERY - it storage electricity. -no output from p v array battery can use to drive the motor.
Working -principal
TECHNOLOGY Submerged multistage c.f. pump-set. Submerged pump with surface mounted motor. Reciprocating positive displacement pump. Floating pump-set. Surface suction pump-set. Solar thermal pumping system according to an organic rankine cycle. Solar pumping with stirling engines.
Solar thermal pumping system according to an organic rankine cycle (orc)
Reciprocating positive displacement pump
comparision of pumping techniques. Advantage
Dis-advanage
Wind-pump
-Un-attended operation. -easy maintanance. -long life.
-water storage require for low wind periods. -high system design.
Solar-pump
-unattended operation. -low maintanance. -long life.
-high capital cost. -water storage require for cloudy periods. -skill persons require.
Hydraulic-pump -unattended operation -easy to maintain -long life.
-require specific site condition.
Diesel & -quick & easy install gasoline pump -low capital cost -widely used
-short life. -noise & fume pollution. -high maintanance cost.
Energy demand for water pumping DH = (Dwell + Dhdyn) + (DHadd + Dhloss) (m ) -------------(1)
EHYD = kSC ´ g ´ r ´ V ´ DH [kWh, V in m3] --------------(2a) kSC = 1/3600 [converting kJ to kWh]
EHYD = KSC ´ V ´ DH [kWh] -------------
(2b)
KSC = 1/367 [introducing also g and r as constants] PHYD = KSC ´ V¢ ´ DH [kW] ------------------- (3)
PSOL >> PEL > PHYD [kW] ------------------- (4) hPV = PEL/PSOL [PV system efficiency] -
(5a)
hSYS = PHYD/PEL [ (hydraulic) efficiency] (5b)
hTOT = hPV ´ hSYS[overall efficiency of the PV pumping set] ----------------------------------- (5c) 0.1 < hPV < 0.15. 0.35 < hSYS < 0.65 0.03 < hTOT < 0.1.
Performance data of pump types APPLICATION
SIZE OFELEC. MOTOR
C.F. PUMP
DISP PUMP
Low head pumping
250..>1200
+
*
OTHER AVG. SYS. EFF.
BEST SYS. EFF.
-
>0.35
>0.55
Up to 0.7
Drinking water supply (a) 150..>800 small size system With D.C.motor
*
+
*
0.3…. 0.4
Drinking water supply (b) Large system with A.C.motor
+
*
*
>0.35 >0.6
*
*
+
<0.45
700…5000
High water head pumping 450…>2000
<0.7
Performance data & cost OUTPUT HEAD (m) m3/day isolation
SOLARARRAY (Wp)
System price US $ FOB
Submerged bore hole motor pump
40 25
20 20
1200 800
7000-8000 6000-7000
Surface motor / Submerged pump
60
7
840
5000-6000
Reciprocating +ve disp. pump
6
100
1200
7500-9000
Floating motor/ pumpset
100 10
3 3
530 85
4000 2000
ATERNATIVE DESIGN & ITS DRAW-BACK There are two ways using solar power to solar-pump - directly connecting the solar panel to the pump. - charging the battery with solar-panel and then using the battery to run the pump. Draw-backs -if the pump is directly power to the solar panel then water can only the pumped when the sun is shining. -charging the battery first and then using that to run.
APPLICATION Village water supply Livestock watering Irrigation
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