Energy

Module 1
Energy: Introduction,forms of energy, Types/ classification of energy resources-origin, availability, cost of production and technology. Fuel poverty . Growing need/energy crisis. Energy scenario in India.World scenario of commercial energy.Energy policy.

Energy:
We can say that it is an inherent ability of a substance to change.Here an important thing that u require to understand is the word ‘change’;which means any modifications, it may of minute in nature or large.
In school days we have been told that energy is the capacity of any system to do work.though it seems right, among learners who are new to thermodynamics, the word work would mislead them.
SI unit of energy is Jule,denoted by the letter J.(It is the amount of energy quire to raise the temperature of 1 gm of water to 1 °F)
Forms of Energy:
There are seven forms in which energy is exist, they are:
1. Light/Radiant Energy-vertical movement
2. Heat/Thermal Energy-due to induction/friction/vibration
3. Chemical Energy-stored between bonds
4. Nuclear/Atomic Energy-stored within nuclei of an atom
5. Mechanical energy-arrived through machine
6. Electrical Energy-movement of electrons
7. Sound energy-horizontal movement
Properties of Energy:

Always move from high to low level (example: if you keep a hot tea cup in a basinful of cool water, you can notice some change in temperature both in the basin as well as in tea cup; tea cup will loose its excess heat due to its close contact with the surrounding water. as a result, water will gain heat from the tea cup.The above process will take place continuously until the temperature of both the things attain equilibrium.

(It strictly obeys the law of thermodynamics)
Energy, neither be created nor destroyed (Law of conservation/the first law)

Energy can change its form from one to another. During the change, some amount of it is wasted.(Entropy)
Energy resource classification:
Strategy:
1. Availability of a resource:
a. Perpetual(solar)
b. Renewable(wind,water,geothermal,OTEC*,Tidal,Biomass)
c. Non-renewable(Coal, petrol,Natural gas,Radioactive minerals)
2. Cost of generation, distribution
a. Commercial-coal,petrol,natural gas,Nuclear)
b. Noncommercial-(Hydro power,Biogas,solar power)
3. Nature of Technology used
a. Conventional –(coal,petrol,natural gas)
b. Non conventional-(solar, wind,OTEC)
4. State of existence
a. Kinetic-exist when object is in moving state
b. Potential-exist when object in rest(stored form of Energy)
NB;if it is closed loop, it comes under renewable otherwise non renewable.

To days assignment:
Difference between perpetual and renewable energy resources
What energy a compressed spring possesses? When it it is released back, to what form it is converted?