[SLED] Metaverse is ONE.

Char-Lez Braden komori_san at hotmail.com
Fri Mar 7 13:25:34 PST 2008


My understanding (proven to be shaky, so someone who really knows might chime in) is that the power rating is a peek maximum sustained load.

Reference: http://michaelbluejay.com/electricity/howmuch.html

Having done the math for myself (and with the gentle corrections of those who can multiply correctly) it's made me modify my behavior.  I've been shutting off my 4 systems when I go to bed.  I figure that's got to save me real $ over a year.  And then I can use that real $ to spend on stupid stuff!


Date: Fri, 7 Mar 2008 13:03:16 -0800
From: polygonsforever at yahoo.com
Subject: RE: [SLED] Metaverse is ONE.
To: educators at lists.secondlife.com

CB,     Well, I was off a couple of decimal places myself, I am quite surprized by the math, one thing still puzzles me, a 400W power supply, does it pull 400 watts all the time it is simply plugged in, or only under a load such as during heavy rendering, while writing to a CD, and running 2 DVD movies on each of 2-monitors simultaneously as you pound on the keyboard and spin your mouse furiously? This factor could put all the calculations off by 1/2 or more.     Parriah

Char-Lez Braden <komori_san at hotmail.com> wrote:        Bruce,

Yep.  Looks like I missed a zero!  Thus why I'm not Mr.


      From: bcdurnell at hotmail.com
To: educators at lists.secondlife.com
Subject: RE: [SLED] Metaverse is ONE.
Date: Thu, 6 Mar 2008 12:41:53 -0600

Close, but my figuring puts 8760 (hours) X 300 (watts/hr.) = 2628000 Approx. Aldon's amount), which makes your calculations off by a power of 10 so rounding to worse case is around $500.00/yr.
Bruce Durnell

      From: komori_san at hotmail.com
To: educators at lists.secondlife.com
Subject: RE: [SLED] Metaverse is ONE.
Date: Thu, 6 Mar 2008 13:29:39 -0500


I think your decimals are off.  I'm not Mr. math or Mr. electricity, so someone please check my numbers here.

24 hours in a day.  365 days a year. Therefore 8760 hours a year.
Given: 300 watts an hour*.  Therefore 262800 watt hours.

Most household electricity use is measured in kilowatt hours, not megawatt hours

Therefore 262.8 KWH, or .2628 MWH

*Apparently the watt rating on your computer is more like a worst case peek load, if that.  I don't pretend to understand the efficiency ratings and all that, but I believe we can safely use this number as an upper bound.  Also, laptops use significantly less power, and desktop are highly variable themselves depending on make, model and peripherals.  So your mileage may vary!

Assuming my
 number above is correct...

Per this: http://www.eia.doe.gov/cneaf/electricity/epm/table5_6_a.html

The national low is 7.2 cents per KWH, and the high is 18.33 cents per KWH.

So your annual power cost is in the range of $18.92 to $48.17.

Round it to a worst case of $50/year.

Someone mentioned camping in all this.  So I shall have a little more fun and consider camping.
The camping spots I have seen pay a wide range or rates, but a common low rate I've seen is L$1 per 10 mins.
That comes to L$6/hr or L$52560/yr.  At L$300 to 1 USD that's USD $175.2/year.  That beats the worst case price for electricity.  Camping is cash positive!  (This does not take into account the capital cost of the computer itself, your time, etc.)

I hope my numbers are right.  Maybe someone can double check me?


      Date: Thu, 6 Mar 2008 10:43:37 -0500
From: Aldon.Hynes at Orient-Lodge.com
Subject: RE: [SLED] Metaverse is ONE.
To: educators at lists.secondlife.com

              Just a quick number to try and put things into perspective.  If I recall properly, the average desktop computer uses
 about 300 watts.  If that computer is left on 24 hours a day, for 365 days, it would use 2.6 MWH.  I must admit that in my little home office, I have three desktops that run 24x7 so I suspect that I am way over the estimates, a couple others that only run part time, and a laptop that is probably on about 10 hours a day.     Aldon    -----Original Message-----
From: educators-bounces at lists.secondlife.com [mailto:educators-bounces at lists.secondlife.com]On Behalf Of Rolig Loon
Sent: Wednesday, March 05, 2008 6:51 PM
To: 'SL Educators'
Subject: RE: [SLED] Metaverse
 is ONE.

    Whoa!  Fascinating numbers, Gavin. I decided to do a quick calculation to double check the 10% estimate in the article you quoted, so ……     There are about 2.4 x 10^8 Internet users in North America (source: http://www.internetworldstats.com/stats.htm). Annual use of electrical energy per capita in the U.S. is 12 MWH (source: http://www.thehcf.org/emaila5.html) – that’s our individual share of all electricity used by us or on our behalf for any purpose. Suppose that 10% of that energy is used to drive the Internet.  That’s 2.4 MWH per person. Multiplied by 240,000,000 Internet users, that’s 576,000,000 MWH of electricity. That’s an overestimate, since at least some of the North American Internet users are Canadians. We can get a wild underestimate by assuming that ½ of them are Canadians, and that’s still 288,000,000 MWH. The article you quoted came up with a figure of 350 x 10^9 kWH, or 350,000,000 MWH, which is right in the ballpark between my upper and lower limits. So, you can at least see where their number comes from.     Does it make sense, though?  They claim that 2/3 of the energy consumed in Internet use is due to desktop computers and monitors. If that’s true, then each of us, on average, is using between 0.8 and 1.6 MWH of electricity for our desktops and monitors each year. I don’t know about you, but I don’t use anywhere near that much electricity myself. Somewhere, someone must be running REALLY POWERFUL desktop systems to drive the average up that high. Or there’s an error in someone’s calculation. I bet I know whose.     Rolig             From: educators-bounces at lists.secondlife.com [mailto:educators-bounces at lists.secondlife.com] On Behalf Of Gavin Dudeney
Sent: Tuesday, March 04, 2008 11:50 AM
To: 'SL Educators'
Subject: RE: [SLED] Metaverse is ONE.     Parriah,     From: Bruce Jones
Subject: Re: [SLED] Metaverse is ONE.     My educated guess (engineer) would be that the internet, all told, accounts for less than .01% of of our gross national electrical consumption. Personal computers consume very little energy and the mainframes consume more energy cooling them off (A/C) than to run them.     This is taken from: http://www.lifeaftertheoilcrash.net/     Contrary to popular belief, the internet consumes tremendous amounts of energy. Author John Michael Greer explains:      “The explosive spread of the internet, finally, was also a product of the era of ultracheap energy. The hardware of the internet, with its worldwide connections, its vast server farms, and its billions of interlinked home and business computers, probably counts as
 the largest infrastructure project ever created and deployed in a two decade period in history. The sheer amount of energy that's been invested to create and sustain the internet beggars the imagination.”  [http://thearchdruidreport.blogspot.com/2008/02/back-up-rabbit-hole.html ]     Recent estimates indicate the infrastructure necessary to support the internet consumes 10% of all the electricity produced in the United States. [http://www.prweb.com/releases/2007/9/prweb555778.htm
 ] The overwhelming majority of this electricity is produced using coal or natural gas, both of which, as explained momentarily, are also near their global production peaks. [http://www.richardheinberg.com/museletter/179 ], [http://www.theoildrum.com/story/2006/11/27/61031/618 ]     I make no claim to the statistics, just pointing them out...     Gavin   
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