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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Energy Assessment: Carbon Reduction Targets and Degree Days

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  1.  
    • CommentAuthortony
    • CommentTimeNov 20th 2012
     
    Do carbon reduction targets take into account how cold the winter was or how warm the summer was?

    Both these could have a significant effect on the amount of energy and hence carbon used
  2.  
    I'm not aware they do, But I presume they would .
    It seems to me its just a set figure , say X% less than the level of start year Y
    So a succession of cold winters would make the presumed savings via measures undertaken less effective at achieving that target?
    • CommentAuthortony
    • CommentTimeNov 20th 2012
     
    Or warm winters and cold summers make everything l=seem very rose tinted!
    • CommentAuthorbarney
    • CommentTimeNov 20th 2012
     
    Depends on how you use the degree day data - if you plug consumption in monthly against that months degree days then you should be able to compare that with say 20 year degree day average and still show that the measures adopted are successful (or not) - effectively a CUSUM analysis

    Try here:

    http://www.carbontrust.com/media/137002/ctg075-degree-days-for-energy-management.pdf

    Regards

    Barney
    •  
      CommentAuthorSteamyTea
    • CommentTimeNov 20th 2012 edited
     
    DUKES takes it into account and that seems to be the national database for energy use.

    The price paid for energy varies, costs more when it is cold, so using costs (as DEFRA does) is not a good gauge. It really should be GJ or kWh, so check on that.

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