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Monday, October 5, 2015

Overview of Technologies

PV Pumping Technology : 
1. Solar PV array: The PV array consists of multiple solar panels connected in series/parallel, which can supply the whole system as power source by converting the absorbed solar radiation energy to the electrical energy.
2. Solar Pumping Inverter : Solar pumping inverter can implement the control of the whole system operation, which drives the  pump by converting DC power produced by the PV array to AC Power. This inverter can adjust the output frequency according to the solar irradiation intensity in real time to implement the MPPT  (Maximum power point tracking). 
 3. Water PumpThe pump driven by a 3-phase AC motor draws water from deep-well or river. The pumped water is then fed into reservoir or water tank, or connected to the irrigation system or fountain system directly. All of centrifugal pump, axial-flow pump, mixed- flow pump, and deep-well pump can be utilized.

 Diesel Pumping Technology :

1.  Diesel engine:
2.  Pump element: The most  common  pump  type  is  the  helical  rotor  pump  also  referred  to  as  the progressive cavity pump and the piston pump.
3.  Discharge/Pump head: The discharge head is fitted above the centre of the borehole. The rising main is fitted to the bottom of the discharge head and the engine is coupled to the pulley through belts. The discharge head transfers the power of the engine to the pump via a circular (progressive cavity) or a reciprocating (piston) action.
4.  Rising main: The rising main consists of 3m galvanized steel pipes (40 or 50 mm diameter) which are coupled together. The rising main pipes either come with a taper thread or parallel thread. The taper is cheaper to manufacture but does not exhibit the strength of the parallel threaded pipe. Taper threaded pipes are recommended for hand pumps but not diesel pumps. However in reality, taper threaded pipes are often installed due to the initial cost savings. A shaft transfers the power down the centre of the column either through a circular action or through a reciprocating action. The shaft is guided either through bobbin bearings or guides


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