HVAC; How it works.
HVAC refers to a complete system of Heating, Ventilation, and Air conditioning. It could refer to the Air conditioner in your room or the large system used in High Rise buildings. HVAC equipment could perform Heating and/or Cooling. Using the same refrigeration cycle it could act as a heat pump for heating or an air conditioner for cooling. How it works. Every refrigeration system has 4 key components that make it work. These are the evaporator, the condenser, the compressor, and the expansion valve. The job of these four main components is explained in the refrigeration cycle. Key things to understand before we continue. § Water boils at 100 °C only at atmospheric pressure, if the pressure is reduced, water would boil at a lower temperature. Boiling point and condensation point temperatures are not fixed because they vary with pressure. § A refrigerant absorbs heat from the environment when it evaporates. § A refrigerant boils (evaporates ) between -20 °C to