An optimization routine on a prediction and selection model for the turbine operation of centrifugal pumps

Energy Saving in a Water Supply Network by Coupling a Pump and a Pump As Turbine (PAT) in a Turbopump

“…Some studies demonstrate that the use of PATs, instead of classic turbines, to substitute the dissipation valves could be a convenient practice even if the available power is low, due to the low price and the mechanical simplicity of such devices [33]. Several studies have shown that the best efficiency of a PAT could be greater than 70% [21][22][23]. Ramos et al [34] showed that the cost of a PAT is much smaller if compared with the cost of a classic turbine, with unit costs ranging between 200 e /kW and 400 e /kW, where the turbine cost ranges between 300 e /kW and 800 e /kW.…”

“…Three main problems limit the convenience of the installation of a turbine governed generator to power the pumping system, namely (i) the small amount of power available; (ii) the high cost of traditional turbines; and (iii) the low combined efficiency of the two electromechanical devices (the turbine generator and the pump motor) [18][19][20]. PATs could be employed instead of classic turbines, since they are considered a viable and flexible solution for energy production in a WDN, due to their lower cost and their generally acceptable efficiency [21][22][23][24]. In order to reduce the investment cost and increase the efficiency of the system, the PAT and a pump can be directly coupled and mounted on the same shaft without any intermediate generator or motor.…”

Conversion relation of centrifugal pumps as hydraulic turbines based on the amplification coefficient

“…The new conversion coefficients of the centrifugal pumps as hydraulic turbines containing flow rate amplification coefficients are calculated by substituting the geometric parameters of these centrifugal pumps into equations (6), (11), and (12). After this, we perform an experiment in order to verify the calculation results of the conversion relations containing flow rate amplification coefficients using the hydraulic turbine experiment table shown in Figure 2.…”

“…Scholars also obtained relations through experimental regression, mainly including the H Nautiyal et al 8 relation; the conversion relations are obtained from the previous works. [9][10][11][12] Currently, these PAT conversion relations differ not only in form but also in conversion result; the calculation error is also greater. Applying on actual engineering project, the performance of selected hydraulic turbine is often not optimal because of the error of these PAT conversion relations is major.…”

Experimental study on optimization of curvature blade impeller pump as turbine which functioned as power plant picohydro

“…Modifications should be made to change pumps impeller, plus the testing required to verify the performance of pump as turbine [9].…”