HDD

(redirected from Heating degree day)
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Related to Heating degree day: Cooling degree day

HDD

abbreviation for
(Computer Science) hard disk drive
Translations

HDD

(Comput) abbr of hard disk driveFestplattenlaufwerk nt
References in periodicals archive ?
Heating degree day data applied to residential heating energy consumption.
Of the hydronic ALM controllers evaluated, savings of 12-13% were recorded, adjusted for heating degree day.
Heating degree day data applied to residential heating energy consumption, Journal of Applied Meteorology 19(3): 241-246.
8) A degree day is defined relative to a base temperature wherein the heating degree day (HDD) refers to a day when temperature is lower than the base and heating is required to reach the base temperature and vice versa.
This team reduced their heating energy use per square foot per heating degree day by the greatest amount.
In contrast, eczema prevalence was increased in regions with a high heating degree day index, which is a statewide, population-based measure of the energy demand needed to heat indoor structures by 1[degrees] F for 1 day using a baseline temperature of 65[degrees] F.
The Chicago Mercantile Exchange lists both heating degree day and cooling degree day contracts.
Initially, these are heating degree day index futures for four U.
Each degree that the average temperature for a day falls below 65 [degrees] F produces one heating degree day.
It also means that periods of relatively low steam usage that are still within the heating season (often called shoulder seasons) should not be used to calculate the energy use to heating degree day ratio used to assess the energy model output.
The answer lies in the data--graphing kWh alone (above right) shows the two years consumed the same amount of energy, but adding in degree days (below right) shows the post-upgrade heating system consumed significantly less energy for each heating degree day present.
The capital of Alberta; Edmonton, with a population approaching one million is located in a 5400 annual Celsius heating degree day zone.