Absorption Refrigeration Systems Overview

The process by which heat is transferred from a concentrated solution to a weak solution.

The component of an absorption refrigeration system where the refrigerant is boiled from the weak solution, producing refrigerant vapor.

The component of an absorption refrigeration system where the refrigerant vapor is condensed back into liquid using cooling water.

A restriction in the refrigeration system that lowers the refrigerant pressure, allowing it to absorb heat from its surroundings.

The component of an absorption refrigeration system where the refrigerant absorbs heat from the chilled water system.

The component of an absorption refrigeration system where the refrigerant vapor is absorbed by the weak solution.

The concentration of the refrigerant solution within the system, measured by the amount of refrigerant dissolved in the absorbent.

The temperature-pressure relationship of a refrigerant, demonstrating the state change between liquid and vapor at various conditions.

The maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature.

The process of forming solid crystals from a solution when the solution becomes supersaturated due to a decrease in temperature or an increase in concentration.

A solution that contains more solute than it can normally hold at a given temperature, causing the excess solute to precipitate out as crystals.

The temperature at which a solution becomes saturated with a particular solute.

In a lithium bromide absorption refrigeration unit, the high-pressure section consisting of the concentrator (generator) and condenser.

In a lithium bromide absorption refrigeration unit, the low-pressure section consisting of the evaporator and absorber.

The process of removing water from a lithium bromide solution to increase its concentration.

A component of an absorption refrigeration system that allows the non-condensable gases trapped within the system to be purged out and released to atmosphere, typically via a hose submerged in water.

A valve used to control the flow of concentrated solution to the absorber, providing a bypass for excess solution.

A valve used to regulate the flow of the purge return solution back to the absorber or generator.

The difference in pressure between the high-pressure side (condenser) and the low-pressure side (evaporator) creates the driving force for the refrigeration cycle.

The process of removing non-condensable gases from the absorption refrigeration system, usually done during startup.

The process of separating the refrigerant from the weak solution by boiling, creating refrigerant vapor.

A valve used to release the trapped non-condensable gases to atmosphere during the purge cycle.

The initial step in the startup of an absorption refrigeration system, which involves checking and verifying that all systems are in correct order.

A device that reduces the pressure of the refrigerant, allowing it to absorb heat from its surroundings.

The stage in a startup sequence where the cooling water supply is turned on to the condenser, which helps to cool down the refrigerant.

The part of the startup sequence where the solution flow is initiated to allow the refrigerant to be absorbed and circulated.

The process of shutting down the absorption refrigeration system, which involves a series of steps to gradually bring the system to a complete stop.

Used to control the flow of concentrated solution to the economizer, providing a bypass for excess solution.

This process involves transferring heat from the concentrated solution to the weak solution, helping regenerate the weak solution and improve efficiency.

The component where the weak solution is regenerated by absorbing heat from a hot water source.

A malfunction in the chilled water flow switch, resulting in the opening of the switch and interrupting the flow of chilled water.

A situation where a cooling system's critical temperatures drop too low, triggering safety mechanisms to shut down the system.

An issue where a safety mechanism triggers due to a malfunction or excessive temperature in the motor, leading to a shutdown of the system.

A special procedure that must be followed during system shutdown to prevent the formation of damaging crystals.

The amount of dissolved substances (like salts and minerals) in water, measured in parts per million (ppm).

A chemical that kills or inhibits the growth of algae, typically used in cooling towers.

A type of alcohol added to lithium bromide solutions in absorption refrigeration systems to improve water absorption and increase efficiency.

A valve used to control the flow of octyl alcohol into an absorption refrigeration system.

A log or printout that records pressure and temperature readings from an absorption refrigeration unit, helping operators identify trends and troubleshoot issues.

A system that automatically controls the operation of an absorption refrigeration unit, often pre-set by the manufacturer.

The process of maintaining the concentration of the lithium bromide solution in an absorption refrigeration system by removing a portion of the solution and replacing it with fresh water.