2. What are Renewable Sources
Types Of Hydro Power Plant
What is Micro Hydro Power Plant
Problems of Macro Hydro Power Plant
Why Micro Hydro Power Plant
Graphical View
Advantages
Disadvantages
3.
4. Large Hydro Power Plant
Medium Hydro Power Plant
Small Hydro Power Plant
Mini Hydro Power Plant
Micro Hydro Power Plant
Pico Hydro Power Plant
10. HYDRO POWER
Hydropower transforms the potential energy of a mass
of water flowing in a river or stream with a certain
vertical fall (termed the “head”)
Hydroelectric power is the cheapest source of
renewable and environmentally benign during
energy,
running.
The potential annual power generation of a hydropower
project is proportional to the head and flow of water
12. CLASSIFICATION OF HYDROPOWER PLANTS :
Classification of hydropowerplants
According to
Capacity
Large
Medium
Small
Mini
Micro
Pico
According to
head
High
Medium
Low
According to
purpose
Single purpose
According to
facility types
Run-of-River
Reservoirs
Multi purpose
In-stream
Pumped storage
According to
hydrological
relation
Single
Cascade
According to
transmission
system
Isolated
Connected to
grid
4
13. Micro-hydro Power
1
3
Micro-hydro power is a type of Hydro electric
power that typically produced up to 100 kW of
electricity using the natural flow of water.
These type of power plant can provide power to
an isolated home or a small community. Micro-
hydro system complement solar energy because
in many areas in winter the water flow is
maximum and solar energy is minimum.
In such areas micro-hydro power is used along
with photo voltaic solar energy.
14. VARIOUS COMPONENTS
1
4
Construction of a Micro-hydro power
plant is site specific. It is made up of a
number of components. Some of them
are……
Intake
Canal
Penstock
Turbine
Generator
Controlling unit
16. TURBINES
9
SARAVANANSIVAMANI
Turbines converts the flow and pressure
energy into mechanical energy.
Turbines are basically of two types i.e.
Reaction & Impulse and Depending upon
the head of the available water further
divide in three categories i.e. High,
Medium & Low head.
According to site specification (i.e.
head and flow) we choose the turbine
to use in micro- hydro power plant.
17. Turbine type Flow Head
Pelton wheel Low
High ( >
70 feet)
Turgo Medium
Medium
(25-75
feet)
Cross Flow High
Low (<25
feet)
10
SARAVANANSIVAMANI
19. What is a TURBINE???
A turbine is a rotary mechanical device that extracts energy
from a fast moving flow of water, steam, gas, air, or other
fluid and converts it into useful work.
A turbine is a turbo-machine with at least one moving part
called a rotor assembly, which is a shaft or drum with blades
attached.
Moving fluid acts on the blades so that they move and impart
rotational energy to the rotor.
20.
21. WORKING PRINCIPLE:
The working principle is very much simple.
• When the fluid strikes the blades of the turbine, the blades are
displaced, which produces rotational energy.
• When the turbine shaft is directly coupled to an electric gene-
-rator mechanical energy is converted into electrical energy.
• This electrical power is known as hydroelectric power.
22. Basic types of turbines
• Water Turbine
• Steam Turbine
• Gas Turbine
• Wind Turbine
Although the same principles apply to all turbines, their specific
designs differ sufficiently to merit separate descriptions.
24. Impulse Turbine
• In an impulse turbine, fast moving fluid is fired through a
narrow nozzle at the turbine blades to make them spin around.
• The blades of an impulse turbine are usually bucket-shaped so
they catch the fluid and direct it off at an angle.
• In an impulse turbine, the fluid is forced to hit the turbine at
high speed.
26. Pelton Wheel
• These are usually used for high head, low flow power plants.
• It was invented by Lester Ella Pelton in the 1870s.
• Nozzles are direct forceful, high speed streams of water
against a rotary series of spoon-shaped buckets, also known as
impulse blades, which are mounted around the circumferential
rim of a drive wheel also called a runner.
• As the water jet hit the bucket-blades, the direction of water
velocity is changed to follow the contours of the bucket.
• Water impulse energy exerts torque on the bucket and wheel
system, spinning the wheel; the water stream itself does a "u-
turn" and exits at the outer sides of the bucket.
• Pelton wheels operate best with Drop height: (50 - 2000 m)
and Flow rate is (4 - 15 m3/s)
28. Applications
• 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 made in all sizes. For maximum power and
efficiency, the wheel and turbine system is designed such that
the water jet velocity is twice the velocity of the rotating
buckets.
• There exist in multi ton Pelton wheels mounted on vertical oil
pad bearing in hydroelectric power.
29. Cross-flow Turbine
• It is developed by Anthony Michel, in 1903 and is used for
low heads. (10–70 meters)
• As with a water wheel, the water is admitted at the turbine's
edge. After passing the runner, it leaves on the opposite side.
• Going through the runner twice provides additional efficiency.
• The cross-flow turbine is a low-speed machine that is well
suited for locations with a low head but high flow.
30. Applications
• The peak efficiency of a cross-flow turbine is somewhat less
than a kaplon, francis or pelton turbine.
• It has a low price, and good regulation.
• As water going through the runner twice, provides additional
efficiency.
• Cross-flow turbines are mostly used in mini and micro
hydropower units.
• Its good point as When the water leaves the runner, it also
helps clean the runner of small debris and pollution.
31. Reaction Turbine
• In a reaction turbine, forces driving the rotor are achieved by
the reaction of an accelerating water flow in the runner while
the pressure drops. The reaction principle can be observed in a
rotary lawn sprinkler where the emerging jet drives the rotor in
the opposite direction.
• In reaction turbines torque developed by reacting to the fluid's
pressure. The pressure of the fluid
changes as it passes through the
turbine rotor blades.
32. Types of Reaction Turbines
• Kaplan Turbine
• Francis Turbine
• Kinetic Turbine
33. Kaplan Turbine
• The Kaplan turbine is a water turbine which has adjustable
blades and is used for low heads and high discharges.
• It was developed in 1913 by the Austrian professor Viktor
Kaplan.
• The Kaplan turbine is an inward flow reaction turbine, which
means that the working fluid changes pressure as it moves
through the turbine and gives up its energy.
• The inlet is a scroll-shaped tube that wraps around the
turbine's wicket gate. Water is directed tangentially through the
wicket gate and spirals on to a propeller shaped runner,
causing it to spin.
The Kaplan turbine having drop height: 10 - 700 m and Flow
rate 4 - 55 m3/s
35. Applications
• Kaplan turbines are widely used throughout the world for
electrical power production. They cover the lowest head hydro
sites and are especially suited for high flow conditions.
• Inexpensive micro turbines on the Kaplan turbine model are
manufactured for individual power production with as little as
two feet of head.
• Large Kaplan turbines are individually designed for each site
to operate at the highest possible efficiency, typically over
90%. They are very expensive to design, manufacture and
install, but operate for decades.
36. FrancisTurbine
• The Francis turbine is a type of water turbine that was
developed by James B.Franceis and are used for medium
head(45-400 m) and medium discharge.(10-700 m^3/s)
• The Francis turbine is a type of reaction turbine, a category of
turbine in which the working fluid comes to the turbine under
immense pressure and the energy is extracted by the turbine
blades from the working fluid.
• The turbine's exit tube is shaped to help decelerate the water
flow and recover the pressure.
• Water flow is radial from exterior to interior.
38. Applications
• Francis type units cover a head range from 40 to 600 m (130 to
2,000 ft).
• Its efficiency decreases as flow decreases.
• They may also be used for pumped storage, where a reservoir
is filled by the turbine (acting as a pump) driven by the
generator acting as a large electrical motor during periods of
low power demand.
39. Kinetic Turbines
• Kinetic energy turbines, also called free-flow turbines,
generate electricity from the kinetic energy present in flowing
water.
• The systems may operate in rivers, man-made channels, tidal
waters, or ocean currents.
• Kinetic systems utilize the water stream's natural pathway.
• They do not require the diversion of water through manmade
channels, riverbeds, or pipes,
• They might have applications in such conduits.
• Kinetic systems do not require large civil works; however,
they can use existing structures such as bridges, tailraces and
channels and do not require any dam or reservoir.
41. Applications
• Fuel used are biomasses, coal etc.
• Modern steam turbines has automatic control system.
• steam heated processes in plants and factories.
• steam driven turbines in electric power plants.
• Because the turbine generates rotary motion, it is particularly
suited to be used to drive an electrical generator about 90% of
all electricity generation in the United States (1996)
42. SOME TURBINE USED IN MICRO HYDRO POWER
SYSTEM
AXIAL FLOW BULB TURBINE
