Exam (elaborations)
Hvac Basics Questions And Answers
- Course
- HVAC
- Institution
- Pennsylvania State University - All Campuses
Hvac Basics Questions And Answers
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Hvac Basics Questions And AnswersHVAC Answer: Heating, Ventilation and Air Conditioning
4 components of an HVAC system Answer: Compressor
Condenser coil
Metering device
Evaporating coil
Compressor Answer: Refrigerant enters the compressor as low-pressure, low-temperature gas, and
leaves the compressor as a high-pressure, high-temperature gas.
Condenser Coil Answer: The condenser removes heat from the hot refrigerant vapor gas vapor until
it condenses into a saturated liquid state, a.k.a. condensation. After condensing, the refrigerant is a
high-pressure, low-temperature liquid, at which point it's routed to the loop's expansion device.
Expansion Device / Metering Device Answer: Creates a drop in pressure after the refrigerant leaves
the condenser. This pressure drop will cause some of that refrigerant to quickly boil, creating a two-
phase mixture.
Popular configurations include fixed orifices, thermostatic expansion valves (TXV) or thermal expansion
valves (pictured above), and the more advanced electronic expansion valves (EEVs)
The Evaporator Coil Answer: The portion of a central air conditioning system that is located in the
zone and connected to the fan/ductwork. It functions as the heat transfer point for cooling indoor air.
An evaporator coil is comprised of a series of coils filled with refrigerant. As the warm/hot air from the
zone is returned to the HVAC system it blows through the evaporator coil where the refrigerant filled
tubes extract both heat and extra moisture, thus cooling the air.
2024
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