positive-displacement compressor

[′päz·əd·iv dis¦plās·mənt kəm‚pres·ər]

(mechanical engineering)

A compressor that confines successive volumes of fluid within a closed space in which the pressure of the fluid is increased as the volume of the closed space is decreased.

Mentioned in

References in periodicals archive

Reciprocating - is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure.

Compressors Focus

The main contribution of this work is the simultaneous optimization of chiller and distribution system operation over a wide range of lift and capacity fraction using a new semi-empirical positive-displacement compressor model and first-principles models of most of the other components.

Efficient low-lift cooling with radiant distribution, thermal storage, and variable-speed chiller controls--Part I: component and subsystem models

This is especially true for centrifugal compressors, where minimum capacity may be only 40% to 50% of the design heating load, before the refrigerant flow may become unstable; this is known as "surge." Surge is not an issue for positive-displacement compressors; therefore, single-compressor screw heat pumps are able to unload to a minimum capacity of 25% to 35% of the design heating load.

Large-capacity, water-to-water heat pumps for centralized plants

Using positive-displacement compressors, PLD transferred the LPG from the idled 8-in.

Product transfer service chosen over LPG flaring

All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.