Pelton Wheel Turbine

Question 1

objective

Answer 1

determine the characteristics of a pelton wheel hydraulic turbine; specifically torque and power as a function of turbine speed

Question 2

equipment: pelton wheel

Answer 2

pelton wheel turbine is driven by a jet of water issuing from a nozzle and striking the buckets on the wheel

the jet causes the wheel to rotate producing torque and power output

Question 3

equipment: digital tachometer

Answer 3

turbine wheel rotational speed measured by a digital tachometer

Question 4

equipment: brake system

Answer 4

measures torque

Question 5

equipment: spear valve

Answer 5

controls the volume flow rate

Question 6

equation: torque on wheel

Answer 6

Torque = (Force 1 - Force 2) Radius of brake wheel

Question 7

equation: power produced from turbine

Answer 7

Power = RPM of turbine * Torque of turbine * (2 * pi / 60)

Question 8

procedure

Answer 8

close spear valve on turbine inlet and close flow control valve

turn on pump and fully open the valve

slowly open spear valve until fully open, allowing jet to drive pelton wheel

increase load on pelton wheel by adjusting knob above both spring balancing forces

repeat steps 5-5 for seven different turbine speeds from 150-750 rpm

record volumetric flowrate by pluggine up drain and record time to reach a certain volume

repeat 3-7 for each speed

close spear valve when finished