By tree_acres_camp on Tuesday, November 03, 2009 - 01:46 pm: Edit Post
Can you explain in simple terms what are heating deegree days?
By admin on Tuesday, November 03, 2009 - 05:21 pm: Edit Post
A heating degree day is basically a unit of measure for how much heat would be used to keep a building comfortable in cold weather.
By tree_acres_camp on Wednesday, November 04, 2009 - 07:32 am: Edit Post
Thanks for the info.
By tree_acres_camp on Wednesday, November 04, 2009 - 07:33 am: Edit Post
I have one more question. Is 65 always the (base temp)?
By admin on Wednesday, November 04, 2009 - 08:55 am: Edit Post
Typically 65 is the base temp as it is the temp at which it is thought that a human is comfortable working in. However, you can use what ever base temp you want, it just has to be noted when you are giving out the data.
By frnash on Wednesday, November 04, 2009 - 12:15 pm: Edit Post
A base temperature of 65°F is typically used for both Heating Degree Days (HDD) and Cooling Degree Days (CDD) particularly by the utility companies.
More accurately, a degree day should be computed as the integral of a function of time that generally varies with temperature. With today's automatic recording thermometers and computers, you'd think we could approach that ideal by at least using the hourly temperature measurements throughout the 24 hour day instead of the maximum and minimum temperatures.
That, and I always thought it was utterly loony to use a base temp of 65°F for Cooling Degree Days (CDD). Particularly as a measure of electrical energy demand in the arid southwest deserts, where humidity is not a big factor in the perceived comfort level. A base temperature of 80°F would probably be more realistic, yet the 65°F base is still used by the utility companies here! (Come on, who really cools their home to 65°F in Phoenix, AZ?)
By admin on Wednesday, November 04, 2009 - 12:50 pm: Edit Post
By frnash on Wednesday, November 04, 2009 - 01:26 pm: Edit Post
See also, from Computerworld: NICS joins petaflop supercomputer club.
By booondocker on Wednesday, November 11, 2009 - 08:24 pm: Edit Post
Nash, I'm think'n that Arizon just skips the cooling part in the formula altogether.'s always hotter than hello, without the "o"!
By frnash on Wednesday, November 11, 2009 - 09:00 pm: Edit Post
Hey Phoenix scored 23 Heating Degree Days (HDD) from October 28-30(!), and that was the total for the entire month as well! Of course we also had a total of 321 Cooling Degree Days (CDD) in October.