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Viewing results 10 - 20 of 318 matches for "D" Back   |   Next
data center
a room or building, or portions thereof, including computer rooms being served by the data center systems, serving a total ITE load greater than 10 kW and 20 W/ft2 (215 W/m2) of conditioned floor area.
data center ITE design power
the combined power in kilowatts of all the ITE loads for which the ITE system was designed. The data center ITE power shall not include any additional loads, such as cabinet fans or other devices, that are not inherent parts of the ITE, even if the loads are part of the UPS operational design load.
data center systems
HVAC systems, electrical systems, equipment, or portions thereof, used to condition ITE or electrical systems. Data center systems may also be shared, serving other data center additions or non-data-center loads.
data display module
device that stores computer output and translates this output into signals that are distributed to a program-determined group of lights, annunciators, and numerical indicators in operator consoles and remote stations.
data logging
(1) (also known as real time processing) processing of data in synchronism with a physical process so that the results of the data processing are useful to the physical operation. (2) device used for collection of characters or analog signals. (3) recording of data about events that occur in time sequence.
data reduction
process of transforming masses of raw test- or experimentally obtained data (usually gathered by automatic recording equipment) into useful, condensed, or simplified intelligence.
data table
collection of data with each item uniquely identified either by some label or by its relative position.
DBT
dry-bulb temperature (DBT
dead air pocket
(also known as dead zone) stagnant area in a space unaffected by air circulation.
dead band
the range of values within which a sensed variable can vary without initiating a change in the controlled process.
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About ASHRAE Terminology

ASHRAE Terminology, a free resource, is a comprehensive online glossary of more than 3700 terms and definitions related to the built environment, with a focus on heating, ventilating, and air conditioning (HVAC), as well as refrigeration, building envelope, electrical, lighting, water and energy use, and measurement terms.

This searchable glossary was designed for use by engineering professionals but is also useful for architects, building owners and operators, educators, public officials, and homeowners.

The terms in ASHRAE Terminology have been assembled and defined and are updated on an ongoing basis by ASHRAE Technical Committee (TC) 1.6, Terminology. TC 1.6 is concerned with terminology, nomenclature, definitions, abbreviations, symbols, and the International System (SI) and Inch-Pound (I-P) units used in the fields of heating, ventilating, air conditioning, water heating, and refrigeration.

To request a free electronic file of the complete list of terms and definitions, email ashraetermseditor@ashrae.org.