- 行业: Government
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The number of degrees per day that the daily average temperature (the mean of the maximum and minimum recorded temperatures) is below a base temperature, usually 65 degrees Fahrenheit, unless otherwise specified; used to determine indoor space heating requirements and heating system sizing. Total HDD is the cumulative total for the year/heating season. The higher the HDD for a location, the colder the daily average temperature(s).
Industry:Energy
The number of revolutions that the motor turns in a given time period (i.e. revolutions per minute, rpm).
Industry:Energy
The outer casing of a window that sits in a designated opening of a structure and holds the window panes in place.
Industry:Energy
The overall rate of heat loss from a building by means of transmission plus infiltration, expressed in Btu per hour, per degree temperature difference between the inside and outside.
Industry:Energy
The part of a power provider's charge based on actual energy consumed by the customer; the product of the kilowatt-hour rate and the total kilowatt-hours consumed.
Industry:Energy
The part of a wind energy conversion device blade, or airfoil, that is the last to contact the wind.
Industry:Energy
The path followed by electrons from a generation source, through an electrical system, and returning to the source.
Industry:Energy
The percentage of a building's seasonal energy requirements that can be met by a solar energy device(s) or system(s).
Industry:Energy
The period marked by successive crossing of the earth's meridian by the sun; the hour angle of the sun at a point of observance (apparent time) is corrected to true (solar) time by taking into account the variation in the earth's orbit and rate of rotation. Solar time and local standard time are usually different for any specific location.
Industry:Energy
