Table of Contents
What is the role of evaporation in a refrigeration system?
The evaporator works the opposite of the condenser, here refrigerant liquid is converted to gas, absorbing heat from the air in the compartment. The evaporator removes heat from the area that is to be cooled. The desired temperature of cooling of the area will determine if refrigeration or air conditioning is desired.
What is purpose of evaporator?
An evaporator is a device used in a process to turn the liquid form of a chemical substance, such as water, into its gaseous form – vapor. The liquid is evaporated, or vaporized, into a gas form of the targeted substance in that process.
What is evaporating temperature in refrigeration?
Evaporation temperature is the temperature at which the refrigerant evaporates and boils in the evaporator, which corresponds to the evaporation pressure. Evaporation temperatures are generally 2-3 °C lower than the required water temperature.
Why is it important that a refrigerant evaporates at a low temperature?
A low temperature difference means that a higher evaporation temperature is possible, which corresponds to a higher pressure. The higher evaporation pressure will also increase the density of the refrigerant gas. For each stroke, the compressor will therefore transport more refrigerant through the system.
What happens to refrigerant heat in the condenser?
What happens to refrigerant heat in the condenser? The refrigerant heat is absorbed into the coil and through forced convection push to the outside air.
What causes cold refrigerant?
Refrigerant expands in the indoor coils, causing it to get very cold. Heat transfer then takes place between the refrigerant and the circulating air. As the refrigerant absorbs heat from the air, the air temperature gets colder. Dirt and grime on your coils can keep this heat exchange from occurring effectively.
What is refrigeration system?
Refrigeration system means a combination of interconnected refrigerant-containing parts constituting one closed refrigerant circuit in which a refrigerant is circulated for the purpose of extracting heat and includes systems in which a secondary coolant, cooled or heated by the refrigeration system, is circulated to …
Is refrigerant gas or liquid?
A refrigerant is a working fluid used in the refrigeration cycle of air conditioning systems and heat pumps where in most cases they undergo a repeated phase transition from a liquid to a gas and back again.
How cold is refrigerant?
between 40° and 50
As its name implies, refrigerant in the evaporator “evaporates”. Upon entering the evaporator, the liquid refrigerant’s temperature is between 40° and 50°F; and without changing its temperature; it absorbs heat as it changes state from a liquid to a vapor.
What temperature does refrigerant freeze?
A refrigerant is basically a liquid or a gas with a very low boiling point. Where water normally boils at 212 degrees Fahrenheit (and freezes at 32 degrees), a refrigerant like R-134a boils at 15 degrees below zero (and freezes at -154).
What are the four stages of refrigeration?
The refrigeration cycle contains four major components: the compressor, condenser, expansion device, and evaporator.
What makes refrigerant boil?
As the refrigerant flows in the evaporator heat is absorbed by the refrigerant, the liquid refrigerant will boil or evaporate into vapor. Heat that cannot be measured by a thermometer, known as latent heat or hidden heat causes the refrigerant to boil.