To achieve energy saving, high efficiency, water pump selection how to carry out? There are many types of agricultural water pumps and different specifications, not just to buy a submersible pump installed to be able to use, but according to farmland on the flow and head requirements to choose the pump.
For the irrigation of the pump, the design flow should be based on irrigation areas to determine the growth of water demand. Often when the drought is no rain, the crop during the growing season, the peak water demand as the basis for water. If the pump can meet the water requirements of this period, it will be able to ensure that other fertility irrigation water.
For the drainage of water pumps, drainage and flood season floods, river network storage capacity and management level. In order to ensure that the crops are covered by waterlogging, from the most unfavorable situation, choose the lowest flooding ability of crops and the most waterlogging period, to determine the drainage flow.
On the design of the head, we must first meet the actual terrain height of the water, that is, water surface to the outlet (or head) the vertical height of the water, with field measurements. However, if this data to select the pump, after installation, the pump is not pumping water, this is because there is friction within the pipeline flow resistance, consumption of a part of the pump head. Therefore, the selected pump, if the actual terrain to meet the height of the water and the loss of pipeline requirements, the pump will be able to work properly. The sum of the two is used as the basis for the selection of the pump.
The size of the pipeline loss head value and the length of the pipeline layout, accurate hydraulic calculation should be carried out, for small and medium-sized irrigation area, in the primary pump type, the pipeline loss head can be used to estimate the way that the pipeline loss is equal to the actual terrain Height (0.1-0.2) times.
Design flow and head to determine the pump is the main parameters of the selection, according to the selected pump can meet the production needs.
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