+ Post New Thread
Results 1 to 2 of 2
Green Computing Thread, A decent carbon calculator in Technical; After the Richard Stallman lecture last night I ended up talking to the CTO of One Planet Computing. They are ...
  1. #1

    Dos_Box's Avatar
    Join Date
    Jun 2005
    Location
    Preston, Lancashire
    Posts
    9,011
    Thank Post
    613
    Thanked 2,194 Times in 1,006 Posts
    Blog Entries
    23
    Rep Power
    632

    A decent carbon calculator

    After the Richard Stallman lecture last night I ended up talking to the CTO of One Planet Computing. They are specialists in green computing and even provide people like Cutter with some of their technologies. Anyway, to cut a long story short, they have a rather natty carbon calculator here: basic carbon calculator and there is alos an advance calculator and one that compares fat client and thin client computers.

  2. #2

    Join Date
    Mar 2010
    Location
    Sheffield
    Posts
    53
    Thank Post
    7
    Thanked 8 Times in 5 Posts
    Rep Power
    11
    Hi Dos_Box,

    Calculating CO2 emissions is quite easy, you just get KWh and multiply by 0.544.

    I think I agree with their PC power calculator, but I don't quite get the 'Virtual desktop comparison' one, it appears to leave out some factors.

    For example, the latest BroadLeaf Energy Efficient Core i7 Desktop idles at 16W and has an average consumption of 20W, compare in a thin client and most of the time these use 15W or so.

    Theory would suggest the thin Client is better right now right? Wrong.

    However, the servers required to run the Virtual Desktops haven't been considered here, which will have a considerable power consumption of several hundred Watts, and support maybe 50 respectable simultaneous multimedia users. This server will be in a server room, running 24/7, which will likely mean it's air conditioned (think double your power consumption here unless you've done some air containment in your server room). This server isn't running the 2000 hours per year + power policy time (power policy time is the time taken for your power management policy to kick in), it's running 8760 hours per year, about 4 times as much.
    In addition there will be the fact that Thin clients can't generally be power managed as effectively as PC's and the Thin client's power policy time is likely much more.

    I also don't advocate turning old computers into thin clients; it might seam like an admirable thing to do but it means your thin client is going to be using 50W when on, 46W in 'sleep' and probably 6W when off. Actually recycling these old machines is so good these days not much is going to see a landfill, manufacturing and embedded CO2 in a new PC or thin client stars from about 100KG and the money saved by the school in electricity would far outweigh the cost of a cheap thin client.

    In order to be legal in the EU, modern computers and thin clients need to consume less than 1.7W in off state, there is no limit on 'sleep' right now. A typical energy efficient PC would use less than 3W on sleep.

SHARE:
+ Post New Thread

Similar Threads

  1. [Video] It's a Superhydrophobic Carbon Nanotube Array - innit.
    By mattx in forum Jokes/Interweb Things
    Replies: 0
    Last Post: 18th October 2010, 12:21 PM
  2. Calculator
    By sippo in forum How do you do....it?
    Replies: 9
    Last Post: 29th March 2010, 08:36 AM
  3. Server Spec Calculator?
    By jamesb in forum Hardware
    Replies: 5
    Last Post: 20th January 2009, 11:58 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •