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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You can always search for terms. |
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| P |
| Pages: «1 2 3 4 5 6 7 8 » |
| PI |
1. pressure independent.
2. proportional + integral control mode. |
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| piezometer |
instrument for measuring pressure or
compressibility |
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| pilot duty | class of operation in which the ultimate load is
controlled by auxiliary means |
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| pilot duty rating |
volt-ampere rating that is applied to electric
devices intended to control an electromagnetic load, other than an electric
motor, such as a control coil or other solenoid. |
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| pipe |
hollow tube conduit for conveying gases,
liquids, semiliquids, or finely divided solids; and having wall thickness
sufficient to be threaded. Compare piping; tube |
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| pipe fitting |
parts used to join, adapt, or adjust other parts
of the piping. See also flange; joint; manifold. |
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| pipe grids |
1.
in an ice rink, the network of pipes laid on the floor, through which
refrigerant or a cooling medium circulates to produce the ice slab.
2.
in cold storage construction, a network of pipes under the structure through
which heated fluid is circulated to prevent freezing and consequent frost
heave. |
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| pipe run |
1. assembly of more than one piece of pipe.
2.
portion of a fitting having its end in line or nearly so, as distinct from the
branch or side opening, as of a tee. |
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| pipe schedule |
pipe size system listing outside diameters and
wall thicknesses for a variety of pressures. |
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| piping |
1. system of pipes for carrying fluids.
2.
pipe or tube mains for interconnecting the various parts of a refrigerating
system. Compare piping system. |
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