I wrote a PC power management savings calculator a few weeks back. The purpose of this online calculator is to estimate the savings for adopting a PC power management solution.
The Variables
A challenge in estimating the savings is that there are a few variables that need to be taken into account. Those variables are:
(1) The number of computer systems,
(2) The average power consumption of each system, and
(3) the local utility rate.
My calculator accepts these three inputs and estimates the savings.
Assumptions
The calculator makes two assumptions: (a) in the BEFORE case, all systems are left running all the time without PC power management. In other words, each computer runs for 8760 hours per year. (b) The second assumption is that – in the AFTER case – all systems are run for only 2080 hours per year. While this is something of a simplification, it is not overly optimistic. According to a study conducted by Beacon Consultants Network, fewer than 10% of US-based computers are configured to take full advantage of energy-saving features.
Calculator Link
Here is a link to the calculator: http://www.enovativenergy.com/Cpm_Calculator.aspx
You can also link to the site to add in the values of the three variables (above). This enables two people to share a common view of the data, which should help simplify a discussion of what results are seen. In the following example, the calculator will run be run to perform its calculations for 100 workstations, with an average power consumption of 100 watts per workstation, and a electricity rate of 7.10 cents per KiloWatt hour:
http://www.enovativenergy.com/Cpm_Calculator.aspx?Systems=100&Watts=200&Rate=7.10
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