Global energy demand has increased very rapidly. Energy consumption is being increased day by day. The humans have consumed ten times more energy during the 20th century. The global economy is expected to double in size by 2030 as shown in following figure regarding “World Marketed Energy Use by Fuel Type” is demonstrating the use of energy since 1980 to 2030 (reference:www.eia.doe.gov/iea).
This is an important need to perform the well-organized and optimized use of energy. Various energy saving techniques are used to organize the energy demand and consumption.
