ASHRAE-90.1-2022- - Page 026
Extracted Content
proposed design: a computer representation of the actual proposed building design, or portion thereof, used as the basis for calculating the design energy cost .
psi-factor (ψ or Psi): thermal transmittance per unit length of a linear thermal bridge in units of Btu/ (h·ft·°F).
public facility restroom: a restroom used by the transient public.
pump: equipment designed to move liquids that may include entrained gases, free solids, and totally dissolved solids by physical or mechanical action and that includes a bare pump and, if included by the manu- facturer at the time of sale, mechanical equipment, driver, and controls. ( Informative Note: The U.S. Code of Federal Regulations (CFR) contains official definitions related to pumps in 10 CFR 431.462. In the United States, the official definitions take precedence over the definitions shown below.)
clean-water pump: a device that is designed for use in pumping water with a maximum nonabsorbent free solid content of 0.016 lb/ft [3] and with a maximum dissolved solid content of 3.1 lb/ft [3], provided that the total gas content of the water does not exceed the saturation volume, and disregarding any additives necessary to prevent the water from freezing at a minimum of 14°F.
end-suction close-coupled (ESCC) pump: a close-coupled, dry-rotor, end-suction device that has a shaft input power greater than or equal to 1.0 hp and less than or equal to 200 hp at its best efficiency point ( BEP ) and full impeller diameter and that is not a dedicated-purpose pool pump . It is also a singlestage, rotodynamic pump in which the liquid enters the bare pump in a direction parallel to the impeller shaft and on the side opposite the bare pump ’s driver end and is then discharged through a volute in a plane perpendicular to the shaft.
end-suction frame-mounted/own-bearings (ESFM) pump: a mechanically coupled, dry-rotor, endsuction device that has a shaft input power greater than or equal to 1.0 hp and less than or equal to 200 hp at its best efficiency point ( BEP ) and full impeller diameter and that is not a dedicated-purpose pool pump . It is also a single-stage, rotodynamic pump in which the liquid enters the bare pump in a direction parallel to the impeller shaft and on the side opposite the bare pump ’s driver end and is then discharged through a volute in a plane perpendicular to the shaft.
inline (IL) pump: a device that is either a twin-head pump or a single-stage, single-axis flow, dry-rotor, rotodynamic pump that has a shaft input power greater than or equal to 1.0 hp and less than or equal to 200 hp at its best efficiency point ( BEP ) and full impeller diameter, in which liquid is discharged through a volute in a plane perpendicular to the shaft. Such pumps do not include pumps that are mechanically coupled or close-coupled, have a pump power output that is less than or equal to 5.0 hp at its BEP at full impeller diameter, and are distributed in commerce with a horizontal motor.
radially split, multistage, vertical, inline diffuser casing (RSV) pump: a device that is a vertically suspended, multistage, single-axis-flow, dry-rotor, rotodynamic pump and
a. has a shaft input power greater than or equal to 1.0 hp and less than or equal to 200 hp at its best
efficiency point ( BEP ) and full impeller diameter and at the number of stages required for testing; b. in which liquid is discharged in a place perpendicular to the impeller shaft; c. for which each stage (or bowl) consists of an impeller and diffuser; and d. for which no external part of such a pump is designed to be submerged in the pumped liquid.
submersible turbine (ST) pump: a device that is a single-stage or multistage, dry-rotor, rotodynamic pump that is designed to be operated with the motor and stage(s) fully submerged in the pumped liquid; that has a shaft input power greater than or equal to 1.0 hp and less than or equal to 200 hp at its best efficiency point ( BEP ) and full impeller diameter and at the number of stages required for testing; and in which each stage of this pump consists of an impeller and diffuser, and liquid enters and exits each stage of the bare pump in a direction parallel to the impeller shaft.
pump system power: the sum of the nominal power demand ( nameplate horsepower ) of motors of all pumps that are required to operate at design conditions to supply fluid from the heating or cooling source to all heat transfer devices (e.g., coils, heat exchanger) and return it to the source.
purchased energy: energy or power purchased for consumption and delivered to the building site .
purchased energy rates: costs for units of energy or power purchased at the building site . These costs may include energy costs as well as costs for power demand as determined by the adopting authority .
R-value: see thermal resistance .
24 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)