It's true that efficiency can vary by 1-2% depending on load, but that's within the measurable margin of error. Almost all power supplies are designed to give best efficiency at about 80-90% of maximum load. http://www.facebook.com/people/Jim-Phong/100001178973449 Jim Phong A good brand 80 Bronze rated PSU is the bare minimum. These methods achieve distances on the order of a kilometer. my review here
Unfortunately, existing high efficiency power supplies aren't available "at virtually no cost"; they tend to be quite a bit more expensive than their less efficient cousins. For active versus passive, for the most part the ESR of the coil is very low so it is a minimal power loss and negligible for purposes other than design of It's usually not much, unless you happen to run a server farm. Co-founder of Stack Overflow and Discourse. http://superuser.com/questions/512571/why-are-computer-power-supplies-seemingly-inefficient
Joel Hruska Les, I consulted the available documentation on the PSUs I tested. Let’s say I work from home, so I’m using the PC for usual work stuff (email, Internet, etc.) using an average of 200W for 8 hours of the day. Reason power companies love a PF of 1 is that it reduces the IR losses over the Transmission lines, thus reducing the Power generation requirements.Ref PSU size, You hit the nail
Why is 7 the most feared number? I can't speak to low-end units. However, these are not necessarily suitable for mass-market consumer power supplies. Psu Efficiency Calculator As for why it's not been tried since, it's primarily because such a system could not be strictly metered.
I believe they also got a special psu tester as well. Power Supply Efficiency Curve My rig uses one and at 400W power draw the corsair link monitoring sw shows it as 99% efficient! It almost never shifts from this efficiency which is handy as my machine runs SETI so maxes the cpu to 100% (145W) 24/7. https://blog.codinghorror.com/upgrading-to-a-high-efficiency-power-supply/ We don't really know what the health effects of long term exposure to significantly powerful electric fields are.
See also Antenna efficiency List of electronics topics Maximum Power Theorem Thermal efficiency Mechanical efficiency Performance per watt References External links Conversion: Energy efficiency in percent of passive loudspeakers to sensitivity https://www.scribd.com/doc/52475101/INEFFICIENT-POWER-SUPPLY-IN-NIGERIA The average retail price for the United States is $0.0999 per kWh as of 2011. Power Supply Efficiency Calculation actionjksn You can use too big of a power supply although it's better for it to be too big than too small. Are There Any Connectors Your System Needs That The Power Supply Doesn't Have For example, the heat rate of a fossil-fuel power plant may be expressed in BTU per kilowatthour.
Mxx This was the primary reason why I just bought 80+ Platinum PSU. http://wphomeguide.com/power-supply/not-sure-about-power-supply.php A power supply only puts out as much power as demanded of it. shial The rule of thumb I use last time I researched it was you should tally up the amount of power of your system and that should equal 80% of the Just go with it! Why Is It Important To Buy A Power Supply That's Close To
Yes, that's great for the life of the components, keeping heat down, but it's not efficient. It makes the PSU very efficient without putting it under strain and nothing will get power starved even under load. Unsourced material may be challenged and removed. (October 2012) (Learn how and when to remove this template message) High efficiency is particularly relevant in systems that can operate from batteries. http://wphomeguide.com/power-supply/power-supply-and-power-jumper.php Compare that to the WiTricity from Joel which states an efficiency of 40% over 2 meters.
Wireless energy does not magically find its way to your receiver with 100% efficiency. 80+ Titanium Now I'm worried if my other components got fried as well, all relatively brand new and not even a month of age, all at risk because of this PSU failure. :( This is the most common and most practical form of transmitting energy wirelessly at the moment.
actionjksn That doesn't happen ever. unnecessary ripple can cause premature failure of sensitive components in a number of different PC subsystems. If you do keep a machine running 24×7 like a lot of businesses, this is a no-brainer. Power Supply Modular No power supply has constant efficiency over the permissible power range.
If a power supply is more efficient, it requires less AC power to produce the same amount of DC power than a lesser efficient unit and less heat is produced. A. Forgive the naivety of the question, but if technology that could transmit electrical current wirelessly was invented over 100 years ago, why don't we use wireless electricity in our day to useful reference share|improve this answer edited Jun 19 '13 at 14:54 answered Aug 17 '12 at 17:52 embedded.kyle 7,15511636 1 Possibly relevant link to go with your answer: en.wikipedia.org/wiki/WiTricity, it's a third
http://www.facebook.com/people/Jean-Rodney-Larrieux/18708428 Jean Rodney Larrieux Most memorable line of the article: "anything with words like Sparkle, Max, Tech, Sun, Bright, or Beam in the name is virtually guaranteed to be garbage" …Can't This view, by the way, is now confirmed. If a lightbulb is supposed to intercept the power from this field to light itself, how exactly is your body not supposed to intercept some power? More resources See also solved Looking for an efficient power supply solved does 80+ psu is a myth?are all generic power supplies bad?let's discuss solved Need An efficient Power supply for
And until they can figure out how to harness the power of a volcano to produce electricity, a kWh in Hawaii can cost as much as $0.3154! It is not radiated; it is conserved. . . . The fourth came out of a system I reviewed years ago.
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