Friday, 20 July 2012

Electrical Use Mistakes that Will Cost You

It is remarkably easy to waste electricity in our homes. Reducing some of this waste requires replacing inefficient equipment, but much of it can be solved by low or no-cost changes, or often, just a change in behavior.

Mistake #1: Leaving Ceiling Fans Running

Starting with the simple stuff, an amazing amount of electricity is wasted by just leaving things on when not needed. Ceiling fans are the worst culprits - if you aren't sitting under a fan, it isn't doing anything but wasting energy. Turn them off when you leave the room, period. If you're too lazy to flip a switch, then invest in timers or occupancy sensors that will do it for you.

Sunday, 25 March 2012

LED can emit more optical power than the electrical power it consumes

( -- For the first time, researchers have demonstrated that an LED can emit more optical power than the electrical power it consumes. Although scientifically intriguing, the results won't immediately result in ultra-efficient commercial LEDs since the demonstration works only for LEDs with very low input power that produce very small amounts of light.

The researchers, Parthiban Santhanam and coauthors from MIT, have published their study in a recent issue of Physical Review Letters.

As the researchers explain in their study, the key to achieving a power conversion efficiency above 100%, i.e., "unity efficiency," is to greatly decrease the applied voltage. According to their calculations, as the voltage is halved, the input power is decreased by a factor of 4, while the emitted light power scales linearly with voltage so that it's also only halved. In other words, an LED's efficiency increases as its output power decreases. (The inverse of this relationship - that LED efficiency decreases as its output power increases - is one of the biggest hurdles in designing bright, efficient LED lights.)

Saturday, 7 January 2012

Energy Saving Tips

Tips to save electricity and energy at home:

  1. Reduce the temperature of your geyser to around 55 degrees Celsius so that you don't need to add too much cold water when you shower or do the dishes. 
  2. Remember to keep the lid on the pot when you cook to conserve heat and energy.
    The size of the pot should match the size of the stove plate; this can save you up to 25% on the electricity you use while cooking.
  3. Close the windows and doors when the heater is on and save money!
  4. Close the door every time you take things out of the fridge and also check that it seals properly.
  5. Soak beans, samp and other related dry food over night. This will save time, money and several hours of cooking.