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Impulse Turbine Presentation Transcript
1.Impulse Turbine
Static pressure unchanged
Converts only Kinetic energy
Exe:-Tangential flow on buckets (Pelton)
Static pressure unchanged
Converts only Kinetic energy
Exe:-Tangential flow on buckets (Pelton)
2.Pelton Turbine: The First Titled Impulse Turbine
Lester Allan Pelton, considered to be the father of modern day hydroelectric power, was born in Vermilion Township, Erie County, in Ohio.
On September 5, 1829.
Pelton embarked on an adventure in search of gold.
Shifted to California from Ohio in 1850, he was 21 years old.
After a failed quest for gold, he joined in the gold mines as a millwright, and carpenter at Camptonville, Yuba County, California in 1864 .
Lester Allan Pelton, considered to be the father of modern day hydroelectric power, was born in Vermilion Township, Erie County, in Ohio.
On September 5, 1829.
Pelton embarked on an adventure in search of gold.
Shifted to California from Ohio in 1850, he was 21 years old.
After a failed quest for gold, he joined in the gold mines as a millwright, and carpenter at Camptonville, Yuba County, California in 1864 .
3.PELTON TURBINE
4. IMPULSE TURBINE
High velocity jet discharging at atmosphere pressure hit buckets turning the turbine
Momentum change is through change in flow direction
No Pressure Change
As jet velocity is depends on the head (v ~ H0.5). So it is unsuitable for low head.
It requires high head
Ideal Specific speed is 1-10 rpm
High velocity jet discharging at atmosphere pressure hit buckets turning the turbine
Momentum change is through change in flow direction
No Pressure Change
As jet velocity is depends on the head (v ~ H0.5). So it is unsuitable for low head.
It requires high head
Ideal Specific speed is 1-10 rpm
5.Parts of Pelton Turbine
The main components of a Pelton turbine are:
(i) water distributor and casing,
(ii) nozzle and deflector with their operating mechanism,
(iii) runner with buckets,
(iv) shaft with bearing,
(v) auxiliary nozzle.
Auxiliary nozzle is used as brake for reducing the speed during shut down.
The runner is located above maximum tail water to permit operation at atmospheric pressure.
The main components of a Pelton turbine are:
(i) water distributor and casing,
(ii) nozzle and deflector with their operating mechanism,
(iii) runner with buckets,
(iv) shaft with bearing,
(v) auxiliary nozzle.
Auxiliary nozzle is used as brake for reducing the speed during shut down.
The runner is located above maximum tail water to permit operation at atmospheric pressure.
6.Key Parts of Pelton Turbine
7. HEPP with Pelton Wheel
8. Hydro Electric Plant with High Heads
9.Different Layouts of Pelton Turbine
Arrangement of Jets
Arrangement of Runners
Arrangements of Turbine Shaft
Arrangement of Jets
Arrangement of Runners
Arrangements of Turbine Shaft
10. Arrangement of Jets
11.Specific speed
The specific speed of a turbine dictates the turbine's shape in a way that is not related to its size.
This allows a new turbine design to be scaled from an existing design of known performance.
The specific speed of a turbine dictates the turbine's shape in a way that is not related to its size.
This allows a new turbine design to be scaled from an existing design of known performance.
12.Application
Pelton wheels are the preferred turbine for hydro-power, when the available water source has relatively high hydraulic head at low flow rates.
Pelton wheels are the preferred turbine for hydro-power, when the available water source has relatively high hydraulic head at low flow rates.
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