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70 TRG-TRC011-EN
Glossary
condenser A component of the absorption refrigeration system in which
refrigerant vapor is converted to liquid as it rejects heat to cooling water.
cooling water Water obtained from a source (cooling tower, river, pond) to
which heat is rejected. This water flows through tubes in the absorber and the
condenser.
corrosion inhibitor Chemical added to the absorbent solution to protect the
steel components of the chiller from the corrosive action of the water and
lithium bromide solution.
crystallization The process of the absorbent leaving the solution as a solid,
when the solution is cooled below its saturation temperature.
dilute absorbent solution A mixture of refrigerant and absorbent that has a
relatively high refrigerant content and low absorbent content.
direct-fired A type of absorption chiller that uses the combustion of a fossil
fuel (such as natural gas or oil) directly to provide heat to the high-temperature
generator.
double-effect A type of absorption chiller that uses two generators, a high-
temperature generator and a low-temperature generator.
equilibrium chart A graphical representation of the properties of lithium
bromide solutions. Vapor pressure is plotted on the vertical axis, solution
temperature on the horizontal axis, and concentration on the diagonal lines.
evaporator A component of the absorption refrigeration system where cool
liquid refrigerant absorbs heat from water (from the building system), causing
the refrigerant to boil.
expansion device A component of the absorption refrigeration system used to
reduce the pressure and temperature of the refrigerant to desired evaporator
conditions.
flash The process of liquid refrigerant being vaporized by a sudden reduction
of pressure.
generator A component of the absorption refrigeration system in which
refrigerant vapor boils and is separated from the absorbent solution as it
absorbs heat from the primary heat source.
indirect-fired A type of absorption chiller that uses steam or a hot fluid (such
as water) from an external source to provide heat to the generator.
intermediate absorbent solution A mixture of refrigerant and absorbent that
is a combination of dilute and concentrated solutions.
performance additive Chemical added to the absorbent solution to enhance
the rate at which refrigerant vapor is absorbed by the lithium bromide solution,
improving the performance of the cycle.