Friday, 26 September 2014

Hot water without Electricity

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. 

Sunday, 13 November 2011

Energy Saving Myths

Myth #1: Closing the Vent Saves Energy

Though it seems that closing vents in unused rooms would save energy, the energy consumed by the system is at the unit itself, and restricting conditioned air at a vent termination redirects it to other locations in the house or through leaks in your duct system. Closing vents also puts backpressure on the fan that pushes the air through the system, causing it to work harder, use more energy, and wear out faster.

Tuesday, 8 November 2011

How To Save Heating Costs - Practical Tips

Saving energy is easy to do but it requires one to take action.

Here are a series of no or low cost heating tips you can implement to save yourself money and reduce CO2 emissions. As yo can see, it is not very difficult to get a much more energy efficient home heating situation!

Consider implementing some of the following no or low cost heat energy saving strategies:

Monday, 24 October 2011

Geyser Efficiency – blankets, pipe insulation and timers can result in lower electricity bills

Some of us more cash strapped individuals know where the geyser switch is so that we can turn it on and off during the day. But this supposedly clever idea can turn out to be rather frustrating when we forget to turn the geyser back on, which results in a cold shower and a miserable individual.

Geysers supply us with hot water for daily chores and tasks that include washing dishes, our hands and ourselves. The way in which a geyser functions is relatively simple. The geyser consists of an electrical element that heats up when the geyser is on. This electrical element then heats the water up within the geyser, therefore supplying us with hot water for our home.