14-08-2013, 04:16 PM
ENERGY EFFICIENCY OF MOTORS AND APPLIANCES
[attachment=57173]
ENERGY EFFICIENCY PURPOSE
The purpose of energy efficient appliances and motors is to be able to supply the same level of energy service only using less energy.
Efficient energy use is achieved primarily by means of a more efficient technology or process rather than by changes in individual behavior.
Energy conservation reduces the energy consumption and energy demand per capita and thus offsets some of the growth in energy supply needed to keep up with population growth
MAKING A DIFFERENCE
Along with saving money, energy efficient appliances and motors save the plant
The energy used to run a product can be cut up to 80%
There is a large potential to make a difference because all appliances energy usage can be cut
Fridges, washers, dryers, cars
Light bulbs, anything that plugs
Into an outlet.
OPERATION
You can apply new ways to your old appliances to make them more energy efficient
Keep air filters clean, vents clean, and baseboards clean
Get a furnace tune up
Defrost your refrigerator so ice doesn’t build up on the coils
Turn off appliance when they are not being used
Un-plug appliances
Motor Efficiency: Converting Electricity into Mechanical Motion
The energy efficiency of motors depends on the type of motor. Some are built to be more energy efficient while others are not. It may be wise to invest in motors with higher efficiencies than what is required, even if they are a bit more expensive. Energy efficient motors reduce the amount of lost energy going into heat rather than power by using steel with better magnetic qualities, bigger diameter wire, and better bearings. Since less heat is generated, less energy is needed to cool the motor with a fan—further improving energy efficiency.
How Much Energy They Consume as Compared to Purchase Price
Over a typical ten-year operating life, a motor operating most of the time can easily consume electricity valued at more than 50 times the motor’s initial purchase price. This means that when you spend $1,600 to purchase a motor that operates continually, you may be obligating yourself to spend more than $80,000 on electricity.
Another example is that even at the relatively low energy rate of $0.04/kWh, a typical 20-horsepower (hp) continuously running motor uses almost $6,000 worth of electricity annually, about six times its initial purchase price.
Political/Economic Obstacles
On December 19, 2007, President George W. Bush signed into law the Energy Independence and Security Act of 2007.
Similar to its predecessors, the Energy Policy Act of 1992, and the Energy Policy Act of 2005, and related pieces of legislation dating back to the 1970s, the 2007 Act aims to restructure and reduce, or at least slow the rate of growth in America’s energy consumption.
Perhaps more importantly for motor users the 2007 version increases the mandated efficiency of electric motors in commercial and industrial applications, and expands the range of motors that in question. The 2007 Act takes effect on December 19, 2010.
NEMA Premium® will become the minimum efficiency standard for many motors in 2010, making the U.S. standards the highest in the world.
Improvements
Increasing the thickness of the copper wires wound around the core of the motor. This reduces both the electrical resistance losses in the wires and the temperature at which the motor operates.
Using more and thinner high-quality steel sheets for the main fixed and rotating parts of the motor. This also minimizes electrical losses.
Narrowing the air gap between the spinning and stationary motor components, increasing the strength of its magnetic field. This lets the motor deliver the same output using less power.
[attachment=57173]
ENERGY EFFICIENCY PURPOSE
The purpose of energy efficient appliances and motors is to be able to supply the same level of energy service only using less energy.
Efficient energy use is achieved primarily by means of a more efficient technology or process rather than by changes in individual behavior.
Energy conservation reduces the energy consumption and energy demand per capita and thus offsets some of the growth in energy supply needed to keep up with population growth
MAKING A DIFFERENCE
Along with saving money, energy efficient appliances and motors save the plant
The energy used to run a product can be cut up to 80%
There is a large potential to make a difference because all appliances energy usage can be cut
Fridges, washers, dryers, cars
Light bulbs, anything that plugs
Into an outlet.
OPERATION
You can apply new ways to your old appliances to make them more energy efficient
Keep air filters clean, vents clean, and baseboards clean
Get a furnace tune up
Defrost your refrigerator so ice doesn’t build up on the coils
Turn off appliance when they are not being used
Un-plug appliances
Motor Efficiency: Converting Electricity into Mechanical Motion
The energy efficiency of motors depends on the type of motor. Some are built to be more energy efficient while others are not. It may be wise to invest in motors with higher efficiencies than what is required, even if they are a bit more expensive. Energy efficient motors reduce the amount of lost energy going into heat rather than power by using steel with better magnetic qualities, bigger diameter wire, and better bearings. Since less heat is generated, less energy is needed to cool the motor with a fan—further improving energy efficiency.
How Much Energy They Consume as Compared to Purchase Price
Over a typical ten-year operating life, a motor operating most of the time can easily consume electricity valued at more than 50 times the motor’s initial purchase price. This means that when you spend $1,600 to purchase a motor that operates continually, you may be obligating yourself to spend more than $80,000 on electricity.
Another example is that even at the relatively low energy rate of $0.04/kWh, a typical 20-horsepower (hp) continuously running motor uses almost $6,000 worth of electricity annually, about six times its initial purchase price.
Political/Economic Obstacles
On December 19, 2007, President George W. Bush signed into law the Energy Independence and Security Act of 2007.
Similar to its predecessors, the Energy Policy Act of 1992, and the Energy Policy Act of 2005, and related pieces of legislation dating back to the 1970s, the 2007 Act aims to restructure and reduce, or at least slow the rate of growth in America’s energy consumption.
Perhaps more importantly for motor users the 2007 version increases the mandated efficiency of electric motors in commercial and industrial applications, and expands the range of motors that in question. The 2007 Act takes effect on December 19, 2010.
NEMA Premium® will become the minimum efficiency standard for many motors in 2010, making the U.S. standards the highest in the world.
Improvements
Increasing the thickness of the copper wires wound around the core of the motor. This reduces both the electrical resistance losses in the wires and the temperature at which the motor operates.
Using more and thinner high-quality steel sheets for the main fixed and rotating parts of the motor. This also minimizes electrical losses.
Narrowing the air gap between the spinning and stationary motor components, increasing the strength of its magnetic field. This lets the motor deliver the same output using less power.