Energy Storage
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It Describes about needs of energy storage and variations in energy demand.Energy storage is an important solution to get uninterrupted,flexible and reliable power supply. Energy storage can reduce the drawbacks of intermittent resources by storing the excess energy when the sun shine is more and it is utilized during night time.
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Energy Storage
- 1. Need of Energy Storage and Variations in Energy Demand Prepared By, Maithili Periyannan Kumaraguru College of Technology, Coimbatore
- 2. STORAGE: HISTORICAL PERSPECTIVE, INTRODUCTION AND CHANGES Outline Storage Needs Variations in Energy Demand and Supply
- 3. What is Energy? Energy is defined as the ability to do work. Energy can be found in many things and can take different forms. For example, kinetic energy(energy of motion),chemical energy (the potential energy of chemical bonds) and potential energy(energy due to an object's position or structure) Energy is never lost, but it can be converted from one form to another.
- 4. STORAGE NEEDS Why Energy Storage? We need a secure, reliable electricity supply. Need electricity supply 24 hours a day. Need to make more use of renewable energy resources, such as solar and wind. To reduce our reliance on non-renewable fossil fuels such as oil and gas.
- 5. Why Energy Storage? Conversion of excess electricity into a different form of energy It can be reconverted into electricity with minimum losses This can be done to reduce the gap in supply and demand of electricity. It can be applied to both conventional sources of electricity and renewable energy
- 6. Low power application in isolated areas, essentially to feed transducers and emergency terminals. Medium power applications in isolated areas (individual electrical systems , town supply) Network connection application with peak levelling Power quality control applications Electricity storage systems
- 8. Its not so easy to use solar & wind for all our needs. The clouds pass the sun and the wind gusts fast and slow Solar power and wind power are not always available The solution to this problem lies in energy storage. We can have a power supply that is available 24/7 by storing the energy generated from Solar and Wind. RES Drawbacks
- 10. Difference Between RES & non-RES
- 11. Use of renewable electricity generation, improved energy storage technologies have several benefits: Security: A more efficient grid that is more resistant to disruptions. Environment: Decreased carbon dioxide emissions from a greater use of clean electricity. Economy: Increase in the economic value of wind and solar power and strengthened U.S. competitiveness in the clean energy race. Jobs: New income sources for rural landowners and tax revenues for wind and solar development areas. More jobs in supporting sectors such as manufacturing, engineering, construction, transportation and finance.
- 12. The following list includes a variety of types of energy storage: Biological Starch Glycogen Chemical Hydrogen Biofuels Liquid Nitrogen Electrical Capacitor Super-capacitor Superconducting magnetic energy storage Types of Energy Storage
- 13. Mechanical Compressed air energy storage (CAES) Flywheel energy storage Spring Gravitational Potential energy storage device Hydroelectric energy storage Electrochemical Batteries Flow battery Fuel Cell Ultra-Battery
- 14. Thermal Ice Storage Molten Salt Steam Accumulator Solar Pond Hot Bricks Cryogenic liquid air or Nitrogen Seasonal Thermal Store
- 15. Variations in Energy Demand Demand for electricity in the utility system is varies in a hourly basis, daily basis or season to season. Solution: Inter connected network Use Newer plants used for base load and older plants for additional loads Construct not expensive, low infrastructure small plants Energy storage systems
- 16. Demand<supply----storage of excess energy Demand> supply----Stored energy released Stored energy-----small power, large time period(5MW in 6hrs) Released energy------large power, short time period(10MW in 3hrs)
- 19. As mentioned before, it is necessary to produce the almost exact amount of electricity that is demanded by customers. In order to maintain grid stability, a frequency of 50 or 60 hertz (Hz) (depending on the countrys standard) must be generated. Higher deviations (賊 2.5 Hz) will result in causing damage to the generators. The curve progression varies over the day; but, behavior is usually steady and pretty well known for each day and is used as a road map for production along general lines. For example, the need for electricity during the night is low whereas at noon, when everybody starts cooking, it is at its peak.
- 21. Base Load: This is the amount of electricity that is demanded and produced at any time. Nuclear, hydroelectric power or brown coal plants are known and common to use as base load plants due to the long startup time and/or the low operating and fuel costs. Intermediate Load: Power plants that are easier and faster to regulate are used for the task of middle load. These plants are capable of working within minutes to an hour and have moderate operating costs. Black coal or wind plants are typical of middle loads.
- 22. Peak Load: Peak load is the power demand outside of the daily road map. Different events like unexpected hot and sunny days can lead to an extended use of air conditioners and therefore a higher electricity demand. Peak load plants have a fast response time, which means theyre operational within seconds to a few minutes. A typical example would be gas turbine power plants or pumped-storage hydroelectricity