Hydro-kinetic turbines

Sep 9, 2017   //   by admin   //   Knowledge Base  //  No Comments

In order to understand the concept of hydro-kinetic turbine, it is first essential to understand the origin of the word Hydro-kinetic turbine.

This word is a generation of fusion of three basic words such as “hydro”, “kinetic” and turbine”. Let us look at each word separately and derive to concept of working of hydro- kinetic turbine
“Hydro”: this is a Greek word “hydor” which means water.

Kinetic: this is the word which has been ascribed in particular to energy or provided by motion. This refers to anything that is not static but dynamic in nature.
Hence Hydrokinetic refers to the energy possessed by the body of water because of its motion. This energy is of high potential and can be utlised for several purposes.

Water can be a very good source to generate energy. The mechanism through which energy from water can be derived is through use of “turbines”.

Turbines has been derived from a Latin word “Turbo, turbinis” which refers to whirl or vortex. A turbine is a rotary mechanical device compiled by rotor assembly which is like a shaft or drum attached to blades. Following is a picture depicting a turbine. In simple words it looks like a fan with the blades and the rotor converting the energy into electricity.

The structure of turbine is made in such ways that it can help generate energy which can then be used for several purposes.

This turbine is rotated by different means

and hence energy produced because of that is named in accordance. For example, wind, steam, gas, water are ways through the

turbines are rotated which acts upon the blades and impart rotational energy to rotor. Therefore the energy generated by the water in motion is referred to as “Hydro-kinetic” energy.

Let us try to understand more about the Hydro-kinetic turbines.
Water energy can be observed in two states. When the water is in static state and other is when the water is in dynamic state.

Let us look deeply into the concept of energy generated through water when it is is dynamic or motion state.
There are two ways of generating energy from hydro-kinetic systems. One is rotating devices which converts the energy generated by the motion of the water into electricity through the use rotors. This is more practiced in rivers and streams.

The other is method is “Wave energy converter” uses the energy of the water from the fluctuating heights of the water. This is highly optimal with the ocean waves falling from a distant height. Energy generated is higher when the water is falling from higher distant as compared to when the water is reaching the sea-bed.

Operating Mechanism:

For hydrokinetic turbines to work, there is minimum requirement of current in the water and depth of the water. The water consists of potential energy and kinetic energy. That is it carries pressure when in static state. But when it is in dynamic state it carries velocity which is the requirement for the turbine to be able to generate electricity. When this moving water is falling from height or hitting the blades of the turbines, the force of the water is of such potential that it makes the blades move with a same velocity or speed with what the water carries in itself.

The blades achieves the velocity of the water and passes it to rotor which then generates energy from it. The entire amount of energy is now converted into generation of electricity as the water cutting the blades looses a bit of its energy while its touches the blades and blades being rotated consumes a bit of energy and passes the rest of the amount to the rotor assembly.

Hence the hydro-kinetic power depends upon the speed of the river or ocean or tidal current. The higher the pressures or velocity in the water, there is more generation of power.
Advantages:

Highly potential source of energy serving substantial amount of electricity to the world Renewable
Reliable
Pollution free mechanism and hence generates cleaner electricity

Low cost- highly efficient

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