[LINK] Green is not always good...

Scott Howard scott at doc.net.au
Thu Oct 18 20:32:00 AEST 2007


On Thu, Oct 18, 2007 at 05:17:04PM +1000, Howard Lowndes wrote:
> Back of the Envelope
> --------------------
> 
> Say a bought unit consumes 15W as against a built unit consuming 115W, 
> then at the current power cost of around 20 c/kWh (from my last bill) 
> the saving is 2 c/h resulting in a break even time for the customer, 
> against the extra capital outlay, of 5,000 hours on each thin client. 
> Let's assume that these thin clients run for 5 hours per day for 200 

Are these for business or otherwise?  If it's business, do you really
expect that the systems will only run for 5 hours a day, 200 days a year?

Odds are that many of the systems will never actually be turned off, and
even those that are will run for 8+ hours per day, 250+ days per year.

And in a business environment don't underestimate the cooling difference
between 15 watts and 115 watts (remember, at the end of the day all of
those extra watts become heat) - and the cost of dissipating that
additional heat.

  Scott.



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