1. MCL825: Design of Wind Power Farms : Introduction
P M V Subbarao
Professor
Mechanical Engineering Department
I I T Delhi
A Native (Renewable) Source of Energy …..
Every Nation can become its Own Energy Republic ….

2. Gram Swaraj : A pivotal concept in Mahatama Gandhi's thinking
The fundamental concept of Gram swaraj is that every village should be its own republic,
"independent of its neighbours for its own vital wants and yet interdependent for many others in which dependence is necessary," according to Gandhi, writing in 1942.
Each village should be basically self-reliant, making provision for all necessities of life - food, clothing, clean water, sanitation, housing, education and so on ….

3. A Story of A Nativity in Power Generation
For many countries, fossil energy is transported/imported.
The history of wind power in Denmark, provides a salutary example of how socioeconomic conditions influence a technology.
From 1900 to 1910, many Danish wind driven electricity plants were in use.
Diesel engines were beginning to give them some stiff competition by 1910 to 1914 because of their convenience and economy
During World War I, oil supplies to the country were virtually shut off and wind power was resurrected.
Many 20 to 35kW wind power plants were built at that time.

4. The Ups & Downs
After the war, electrification took place throughout the country, and once more the windmill languished.
In 1939, World War II caused another cutoff in fuel supplies, and wind power was once more called upon to the fullest extent possible.
After the hostilities ended, further rapid, extensive electrification took place, but this time the utility of wind power was not discounted.
A research program was begun to consider it as a supplement to the large, central plants.
In the period after 1945, there were developments not only in Denmark, but in France, Germany, and Britain as well.

5. Denmark is Heading Towards 60% Wind Energy
More green energy in the electricity grid: Over the next few years,
Vattenfall’s wind turbines will increase the amount of installed wind capacity in Denmark from 5,300 to 6,800 MW.
By State of Green,

6. Energy is a Vital Need of Humans
Human is only one living species that requires energy for better living.
Is this a pure enjoyment?
Not a necessity?
Yet Human say:
Necessity is the mother of Invention…

7. Thermodynamic Classification of Living Species
Life on Earth
Autotrophs
Heterotrophs

8. Molinology
Molinology (from Latin: molīna, mill; and Greek λόγος, study) is the study of mills and other mechanical devices.
These devices use the energy of moving water or wind, or the strength of animal or human muscle to power machines for purposes such as hammering, grinding, pumping, sawing, or pressing.
Molinology aims to retain the knowledge of those traditional engines which have been rendered obsolete by modern technical and economic trends.
Cultural and scientific interest in molinology is maintained by The International Molinological Society (TIMS), a non-profit organisation which brings together around five hundred members worldwide.

9. Law of Energy Transactions on Earth
The flow of energy from a source to a sink through an intermediate system orders that system.
The Sun provides few thousand million million watts of energy to various planets
Morowitz [1992]

10. Creation of Energy Sources on Earth
WINDS
WIND ENERGY
CLOUDS
HYDRO ENERGY
VEGETATION
CHEMICAL ENERGY
OCEAN
THERMAL
ENERGY
SOLAR
RADIATION
WAVE
VELOCITY
RAINS
CO2 + H2O
PHTOSYNTHESIS
SOLAR ENERGY
INCOMING
RESOURCE
FOSSIL FUEL
COAL
PETROLEUM
NATURAL GAS
FOSSILIZATION
ONE TIME RESOURCE
Capital
Resource
The Sun provides 175 million million watts of power to the Earth’s atmosphere.
Of this, approximately 1-2% is converted to wind energy.