The Harvard approach utilizes the electrochemistry of quinones, organic molecules that are similar to molecules that store energy in plants and animals and are plentiful in crude oil and green plants. Using these naturally abundant and inexpensive organic molecules, the researchers have developed a metal-free flow battery that already performs as well as vanadium flow batteries, while using significantly less expensive chemicals and no precious metals.
Previous membraneless systems have been largely unpractical, but the scaled-up version of the device could have a substantial real-word impact because it could be used to produce energy for a very competitive US$100 per kilowatt-hour. “Most systems are easily an order of magnitude higher, and no one’s ever built anything at that price,” says William Braff, who was part of the research team.
The room also contains a 5-kilowatt battery – which will sell for between $10,000 and $20,000
Imergy is targeting more than just India and the off-grid market. It’s co-designing systems with Flextronics to introduce a 5-kilowatt (30 kilowatt-hour) system for the industrial and residential market in the second quarter of 2014. The 5-kilowatt system would be the size of a fridge.
I was able to determine that my PC consumes approximately 196-210 watts while idling, 240 watts while running a Sisoft Sandra CPU test,
Keep in mind that a 450W PSU does not draw 450 watts of power.
Your computer only draws as much power as required for its operation. As a matter of fact, the highest demand for power is when you first turn on your PC to spin up all the hard drives, DVD/CD drives, fans, etc. The increased capacity PSU has to handle that load which can be several times the power demands of a steady-running PC.
Buy a cheap, simple watt-hour meter
A watt-hour meter is a little device that tells you how much electricity something uses, either at a given moment or over an extended period of time. Just plug the device into the meter, plug the meter into the wall, and read the display. I like the $25 Kill-A-Watt (pictured at right) sold through SmartHome. Just plug it in and see how many watts a device is drawing at any given moment, or how many kWh you’ve used since you turned it on. This is especially useful for finding the amount of kWh used in a month for devices that don’t run constantly, like refrigerators and window unit air conditioners.