Glossary
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The terms and definitions included
in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation,
Air Conditioning & Refrigeration".
To access the complete glossary please
visit ASHRAE's Bookstore.
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| operator |
1.
person responsible for operating building automation equipment or who operates
a machine. 2. in the description of a process, that which
indicates the action to be performed on operands. Compare actuator |
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| operator station |
point of operator interface to a building
automation system using a monochromatic or a color graphic monitor with
keyboard and/or mouse, and optional printers |
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| optimization |
1.
collection of data in a control system in order to produce the best possible
output, usually in accordance with what is most economical.
2.
procedure used in the design of a system to maximize or minimize some
performance index. May entail the selection of a component, a principle of
operation, or a technique. 3. refinement of a system to reduce its energy
requirements |
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| orifice meter |
instrument that measures fluid flow by recording
differential pressure across a restriction placed in the flow stream and the
static or actual pressure acting on the system |
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| orifice plate |
relatively sharp-edged orifice in a plate used
for the calculation of fluid flow rates from measurements of the pressure
difference between the two sides of the orifice. |
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| Orsat apparatus |
gas analyzer based on absorption of CO2,
O2, etc. by separate chemicals that have a selective affinity for
each of those gases |
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| outlet area |
gross overall discharge area of a given
component in an air distribution system.
outlet valve see discharge valve (under valve). |
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| output | 1. capacity, duty, performance, net
refrigeration produced by a system.
2.
(general) current, voltage, power, or driving force delivered by a circuit or
device; terminals or other places where current, voltage, power, or driving
force may be delivered by a circuit of device.
3.
electronic digital computer. Data that have been processed; state or sequence
of states occurring on a specified output channel; device or collective set of
devices used for taking data out of a device; channel for expressing a state of
a device or logic element. 4. process of transferring data from an internal
storage |
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| output rating | heating output capacity of a fuel-burning
appliance |
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| outside air opening |
opening used as an entry for air from outdoors |
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