1. 1 PRESENTEDBY :- vinod rawat Me(b) 09120104112

2.  INTRODUCTION  HISTORY OF ENERGY  REQUIREMENT OF ENERGY STORAGE  DIFFERENT TYPES OF ENERGY STORAGE  ENERGY STORAGE TECHNIQUES  THE FUTURE OF ENERGY  SUMMARY 2

3.  Electrical energy storage uses the form of energy such as chemical, kinetic, potential energy to store energy that will later be converted to electricity again.  The electric energy is stored during the period when production exceeds consumption and stores are utilized when consumption exceeds production, in this way electricity production must not be drastically scaled up or down to meet momentarily consumption instead the production is maintained at more constant level. 3

4.  Energy storage as a natural process is as old as the universe itself.  Recently, mechanical energy of logs are used as defensive measures in ancient forts.  A more recent application is the control of waterways to drive water mills for processing grain or powering machinery.  In the late 1800s, with the widespread introduction of electricity & chemical fuels, energy storage became a dominant factor in economic development. 4

5.  It should store large amount of energy.  It should provide power at a desire level whenever needed.  Energy storage devices must be cheap.  It should be lossless. 5

6.  Grid energy storage  Flywheel energy storage  Battery energy storage  Thermal energy storage  Hydrogen energy storage  Renewable energy storage 6

7. known as large-scale energy storage.  Used to store electricity at large scale within an electrical power grid when production exceeds consumption.  Important at demand over 24 hour period of time.  This has the advantage that fuel-based power plants can be more efficiently & easily operated at constant production level.  Use of this will lower the cost of energy production & facilitate the use of intermittent energy sources. 7

8.  Energy is stored in the form of a rotor.  It should be light not to lose energy as friction losses.  Friction can be reduced by two ways:- By rotating the disk in the evacuated chamber of vacuum. By using magnetic bearing.  Speed = 20000-50000 rpm  Capacity = 3-133 kWhr  Has higher efficiency & more compact. 8

9.  Different energy storage batteries are- flow batteries, fuel cells, lithium iron phosphate batteries, ultracapacitors.  In flow battery electrolyte converts chemical energy into electrical energy.  Fuel cells are electrochemical energy conversion device that convert chemical energy to electrical directly.  Flow batteries have flexible layout, long cycle life, quick response time. 9

10.  Lithium ion batteries are useful as these can be manufactured in any size & shape.  Due to greater charging time lithium iron phosphate batteries are introduced.  Ultracapacitors are capacitors with higher energy density. 10

11.  Storage of energy is done in thermal reservoir for later reuse.  They can be employed to balance energy demand between day time & night time.  With proper application & proper design, off-peak cooling system can lower cost. 11

12.  Hydrogen is also being developed as an electrical power storage medium.  Storage of large amount of hydrogen underground can function as grid energy storage.  By using a turboexpander the electricity needs for compressed storage on 200 bar amounts to 2.1% of the energy content. 12

13.  Renewable energy sources such as solar & wind produce intermittent power.  Wherever these sources reach high levels of grid penetration, energy storage becomes one option to provide reliable energy supplies.  Also include recourse to peaking power plant & smart grids. 13

14.  Current power production methods rely heavily on fossil fuel, solar, wind, tidal, etc.  Our motivation is to minimize the impact on environment.  The present portion of conventional to alternative energy sources is still low for alternative energy to make an impact.  Challenge is the integration of alternative sources into the power grid.  Smart grid is the step in this direction that help control the flow of energy. 14

15. With increase in demand, when generation is at maximum level, it becomes quite necessary to enhance energy storage. And last try to save energy. 15

16. THANK YOU 16