Relationship between power and flow of sewage pumpFor example, how much power waste water pumps do 1m3/h and 100m3/h need?Best detailed listShow the relationship between power and flow
Severe N= gamma gamma ETA QH/1000 liquid (ox / m3) - N- power efficiency eta (kW/h) - head of M Q- volume flow (M / sec)1, power *0.6= flow * lift *9.82, for the water treatment industry, the flow of cubic meters / hour units,Power = (flow * lift *9.8) / (3600*0.6)3, power = flow * lift *0.0045 (general 50%--90%, large pump higher)
There is a formula for motor power = flow (m3/h) * lift head (meter), *9.81/3600/ efficiency (general sewage pump efficiency is about 55%), *1.2 (motor safety factor)For example, 10 tons of flow, lift 10 meters, how much power?N=10*10*9.81/3600/0.55*1.2=0.595. so the motor power we chose should be 0.75KW
If you simply want a formula that satisfies your everyday application, the following will meet the requirement:N= y QH/1000,The severe gamma liquid, cattle - ETA / m3; efficiency; N- kW; H- head, power meters;Q- volume flow per cubic meter / second; divided by 1000 is the change of power W to kW;Attachment: gravity is the density of an object multiplied by gravity. Acceleration is expressed as a force in terms of the weight of a unit;The formula is applicable to situations where the calculation is not high and applicable to any liquid known or known to be heavy;The formula is reduced to three simplifications:1, ignoring the pump impeller, shaft and other friction losses;2, ignore the pump flow loss;3, ignore the pump pipe, as well as mechanical heat loss;As a result of the above three loss in the process, material, liquid delivery the same condition can be simplified as a coefficient, then adjust the ETA - efficiency coefficient, can satisfy the application value.The deduction principle of this formula is relatively simple, and the mechanical work of the pump is considered to be transferred to the mechanical energy of the liquid completely;That is, N= gamma QH, at this time, all the mechanical energy that water possesses;Electrical and mechanical energy conversion efficiency exists, then divided by the conversion efficiency ETA is obtained;N= y QH/1000;Special attention is needed. - though the efficiency represents the input electric energy and water energy ratio; but the relationship between the two have many effects, the structure of pump, pump body, liquid material feeding. If the above formula is used to estimate, it should be revised according to the actual situation.
