HVAC Terminology Flashcards

Front

AMBIENT

Back

the outdoor air

Front

SCHRAEDER

Back

a small spring-loaded pin valve that opens when pressed inward

Front

WET BULB

Back

the temperature at which the air would be if it were fully saturated

Front

CRAC

Back

Computer Room Air Conditioner

Front

SUPERHEAT

Back

the amount of sensible heat gained after the refrigerant has become a fully saturated vapor in either the evaporator or compressor

Front

DOAS

Back

Dedicated Outdoor Air System

Front

SUBCOOL

Back

the amount of sensible heat rejected after the refrigerant has become a fully saturated liquid in the condenser

Front

CTOA

Back

Condenser Temperature Over Ambient - a method for estimating refrigerant pressure targets. refers to how many degrees Fahrenheit the condenser coil temp (liquid saturation temp) is above the ambient temperature.

Front

DELTA T

Back

the temperature difference between the return and supply air temperatures

Front

DTD

Back

Design Temperature Difference - the difference between the evaporator entering air and the vapor saturation temperature