2018/04/04 by Polák, M.
#article #conversion relations #flowrate #head #pump as turbine (PAT) #specific speed
paper · doi:10.15159/ar.18.032
In small - scale hydropower, hydrodynamic pumps used in reverse mode are an important economical alternative to conventional water turbines. E fficient utilisation of these devices however requires taking into account all the specifics of the reverse pump operation and optimise the pump design for maximum utilisation of the hydro - technical potential of the deployment site. The article compares ex isting conversion models, describes initial theoretical assumptions and determines new conversion relations for the design of pumps as turbines (PAT) for the lowest power and specific speed category. The validity of the conversion relations is experimental ly verified on a hydraulic test circuit with a radial centrifugal pump tested in both pump and turbine operation modes. The results of the verification of the new conversion relations proved better correspondence to reality within this category of machines than that reported by the previously used conversion models.