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IBM's Roadrunner Energy Consumption

  1. Oct 27, 2012 #1

    I am to find this supercomputer's energy consumption in GW/h a year.
    I have found its consumption per hour to be 8.4402 GW/h.
    How do I find the value per hour a year? Is it by simple multiplication by number of hrs a year (which doesn't seem right to me)?
    Please advise.
  2. jcsd
  3. Oct 27, 2012 #2


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    In other words it's power consumption is 8.4402 GW.

    So yes, just multiply 8.4402 GW by the the number of hours in a year.
  4. Oct 27, 2012 #3
    But wouldn't that be its power consumption a year, and not 'per hour a year?'
  5. Oct 28, 2012 #4
    Are you sure you didn't find the computers energy consumption in Gigawatts and you are looking for gigawatt*hours/year?
  6. Oct 28, 2012 #5
    I am quite positive. That value was calculated based on data gleaned from the Wikipedia article. You may double check; I could have made a mistake. But does the computer work all year round? Do any other variables change throughout the year? It seems simply multiplying it by 24*365 will be over simplifying it. Yet I could myself be wrong. Any advice?
  7. Oct 28, 2012 #6
  8. Oct 28, 2012 #7


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    No. Energy consumption per year...

    Remember Power = Energy/Time


    Power(GW) * Time(H) = Energy(GWH)

    or in SI units...

    Power(in Watts) * Time(in Seconds) = Energy(Joules)
  9. Oct 28, 2012 #8
    I am slightly confused. Which should it be then? And how do I calculate the hourly consumption a year?
  10. Oct 28, 2012 #9


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    Best avoid the expression "hourly consumption a year". If you want the know how much energy a super computer uses per year in "gigawatt hours" then RTW69 has the right answer...

  11. Oct 28, 2012 #10
    Thanks a lot!
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