It is surprise to see that most of the appliances when they are off and still plugged into the wall consume anywhere between 0 and 3 watts of energy. which is not a lot. especially modern laptops and cellphone chargers which comes with switch mode power supplies are more efficient in reducing the power when the appliance is turned off (0Watt). So we don't need to unplug them everyday. I believe the same technologies will extend to the modern TV and new appliances, as we move away from cathode ray tube monitors.
Please read the report and give me feedback. Also scientists out there keep in mind this is a kindergarten project!
Energy usage and wastage of home appliances
PROBLEM STATEMENT
HYPOTHESIS
RESEARCH
From the research from internet it was written that lot of energy is wasted when the appliance is plugged into the wall and not used. Some appliances waste as much as 10% electricity even when they are turned off. I like to measure the energy used and see how much is wasted when the appliance is not used.
Manipulated variables
Appliance on
Appliance off
Appliance standby
Responding variable
Energy used
Controls
Constant electricity
Same meter
Energy meter
Appliances:
Old computer
Laptop computer
Old TV
New TV
Printer
CD player
Cell phone charger
1. Plug the energy meter in the wall outlet.
2. Plug the appliance in the meter
3. Take the energy measurement reading when ON, Off, and Standby conditions.
4. Repeat the measurements for all appliances.
RESULTS
Energy used by various appliances
APPLIANCE | ENERGY USED( | ||
ON | OFF | STANDBY | |
NEW TV | 301 | 1 | 274(screen saver) |
OLD TV | 88 | 1 | 1 |
LAPTOP | 31 | 0 | 0 |
OLD COMPUTER | 114 | 1 | 40(screen saver) |
PRINTER | 15 | 1 | 1 |
CD PLAYER | 4 | 3 | 3 |
CELL PHONE CHARGER | 2 | 0 | 0 |
CONCLUSIONS
1. The new TV uses lot more energy (301 Watts) than the old TV(88 Watts) because it is big.
2. The laptop computer uses less energy(31Watts) than old computer(114 Watts) because it is small.
3. All the appliances use way less (0-3
4. Turning off the appliance is better than keeping it in standby for some appliances.
Conclusion statement
The appliances do not waste lot of energy when they are turned off even though they are plugged into the wall. This does not support the hypothesis.
Always use an adult to plug and unplug appliances.
Lessons learned by this project.
Turning off lights and appliances when not needed will save lot of energy and money.
Turn off the computer after every use.