In the vapor-compression refrigeration cycle, a "refrigerant" alternately absorbs and rejects heat as it circulates through four components - an evaporator, compressor, condenser, and metering device - changing pressure, temperature, and phases along the way. This interactive online course discusses different types of refrigeration systems and their components. It also discusses metering devices, compressors, and non-condensable gases.
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Training Time: 20 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English
Refrigerant Management
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Refrigeration Theory
Refrigeration - Refrigerant Properties
Refrigeration - Refrigerant Selection
Refrigeration - System Troubleshooting
The following key questions are answered in this module:
What is the purpose of a compressor? The compressor is a pump that increases the pressure of the cold gas refrigerant before it reaches the condenser. The work done by the compressor also raises the temperature of the refrigerant gas.
Can you explain the purpose of the evaporator and condenser? The evaporator and condenser are named for the changes that occur to the refrigerant inside these units. The refrigerant evaporates, or changes from a liquid to a gas, in the evaporator, and it condenses, or changes from a gas to a liquid, in the condenser.
What types of cooling systems are used in commercial and industrial HVAC applications? Two types of cooling systems are used in commercial and industrial HVAC applications: direct expansion or DX systems, and chilled water or chiller systems. Both systems use the vapor-compression refrigeration cycle to transfer heat energy from indoors to outdoors.
Positive displacement is one of the two primary types of compressors. What is the other type? The two primary types of compressors are positive displacement and centrifugal.
Air can enter a refrigeration system when it is open for repairs or service. What could be used to remove it? If air does get into a system, a portable purge unit can be connected to the condenser or receiver to remove it.
Below is a transcript of the video sample provided for this module:
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