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Zelda HVLS In House Testing

Zelda PHDAs stated by Dr. Min Chen, Ph.D., P.Eng. -
``With the help of the testing system WindTrans Systems Ltd. has increased Zelda pump overall efficiency from (45%~55%) to (80%~90%).``

WindTrans' test area consists of an in ground 16' (4.9m) x 8' (2.7m) x 8' (2.4m) steel water tank with a 600 gallon (2271 litre) tank that is elevated 12 ft (3.66m) above Zelda HVLS. A secondary 250 gallon (946 litres) tank is mounted horizontally to Zelda.

Tests that we have performed on Zelda HVLS:

  • Zelda is hand operated drawing water from the tank and pushing it vertically creating 11 ft. (3.35m) of head through a 4" (279mm) discharge pipe.
  • Zelda is operated by several different motor and gear combinations to assess capabilities as a pump.
  • Zelda is tested forward and reverse and for metering potential as a pump.
  • Zelda is deployed as a motor/turbine. Water drops 10 ft. (3m) through a 4" (279mm) vertical pipe driving Zelda. Zelda is directly linked to a generator to generate electricity.
  • Zelda is tested pumping oil, chemicals and high viscosity fluids.
  • Zelda is tested to demonstrate her efficiencies and for power requirements related to head pressure, salvage and lift.



Test Pump Zelda PHD - AVD2 (long use testing)



Torque (lb.in) Speed (RPM) Outlet Pressure (psi) Outlet Flow Rate (GPM) Theoretical Flow Rate (GPM) Fluid Temp (C) Ambient Temp (C) Volumetric Eff (%) Mechanical Eff (%) Overall Eff (%) Test Length (s)
383.99 100.11 3.98 119.77 126.17 20.44 24.51 94.92 71.39 67.77 182.55
402.95 130.75 4.12 157.32 164.78 20.27 21.71 95.47 71.61 68.37 180.53
428.71 160.22 4.23 191.63 201.93 20.35 23.13 94.90 70.71 67.10 180.53
456.46 190.47 4.41 227.71 240.05 20.43 23.85 94.86 70.73 67.10 180.52


Test Pump Zelda PHD - RR1 (new pump testing)



Torque (lb.in) Speed (RPM) Outlet Pressure (psi) Outlet Flow Rate (GPM) Theoretical Flow Rate (GPM) Fluid Temp (C) Ambient Temp (C) Volumetric Eff (%) Mechanical Eff (%) Overall Eff (%) Test Length (s)
368.05 60.40 4.08 59.21 76.12 20.33 20.32 77.79 73.54 57.21 180.52
334.44 90.28 4.17 96.24 113.79 20.40 21.24 84.58 83.54 70.66 180.53
330.78 130.60 4.12 154.47 164.59 21.24 27.33 93.85 87.13 81.78 192.69
359.82 159.87 4.20 186.06 201.48 20.56 22.61 92.35 83.34 76.96 180.52




Click Here To Download Efficiency vs RPM Chart   Click Here To Download Flow Rate vs RPM Chart
Zelda PHD Pumping Up 12 ft   Zelda PHD Pumping Up 12 ft


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