Munro said the increase in cooling and heating degree days
indicates short-term climate change between 2017 and 2018.
On the other hand, 2015 did have 7.4% more heating degree days
and 1.7% more cooling degree days when compared to 2013, attributing 45,433 kWh of total savings to the difference in roof insulation after the upgrade and accounting for weather conditions.
[DD.sub.TH] = heating degree days
(HDD) (Thom 1954; Quayle and Diaz 1979)
Where [HDD.sub.r] and [CDD.sub.r] are monthly heating degree days
and cooling degree days respectively for region r.
Of the hydronic ALM controllers evaluated, savings of 12-13% were recorded, adjusted for heating degree day
. In addition to the field evaluation, Brookhaven National Lab performed laboratory evaluations of ALM controller-equipped boilers to quantify pollutant emission rates per cycle with and without control.
There were 20 percent fewer heating degree days
in the first half of 2012 than in the first half of 2011, Unitil said.
Double-cropping is not used in this area, generally because there are too little heating degree days
. However, a recent study of the last ten years' heating degree days
showed that 80-day hybrids harvested at 35% to 40% moisture content will allow for double-cropping of corn as far north as northern Illinois.
Lower gas therm sales in the Company's utility service territories reflect the effect of warmer temperatures in 2010, where there were approximately 22% and 12% fewer Heating Degree Days
in the the three and six month periods, respectively, compared to the prior year.
Riker says the company already has created more than 500 customized indexes for five industries, based on weather correlations over specific time periods to benchmarks such as heating degree days
. North America is the focus now, he says, and expansion to global markets "will be limited to where there is good weather data."
Currently, New York is at 68% of normal heating degree days
If a weather station recorded an average daily temperature of 78[degrees]F, cooling degree-days for that station would be 13 (and 0 heating degree days
Estimating gas deliveries to customers at the end of each month based on heating degree days