Air Conditioning

Air conditioning is the process of moving
heat from one extraction device to another via compression and a condensable gas.

Freon gases accomplish this process very easily. Through compression,
the Freon are superheated where they then run through a condenser coil, and
turn into a liquid. The Freon then go through refrigerant lines to an
evaporator coil inside the HVAC unit in the conditioned space (room), where
it hits a metering device to create a rapid pressure drop. As the cooled
liquid goes through the metering device, it evaporates extremely fast, and
becomes very cold. It then runs through the evaporator coil and picks up
heat from the conditioned space (room), returns to the condenser as a
saturated vaporous gas and goes through the compression and condensing
process again.

Air conditioning system components include a compressor, condensing coil,
evaporator coil and fans to extract heat from both coils. The result is air
that is approximately 20 degrees colder inside the conditioned space (room)
after it passes through the evaporator coil. This air is then distributed
throughout the conditioned space. The air, after passing through the
condensing coil, is approximately 20 degrees warmer than outdoor air, and
this is how heat is transferred from the inside conditioned space (room) to
the outdoors.

The process can be reversed to heat the conditioned space if the unit is a
hybrid heat pump. Most homes have either a window or central air
conditioning system, rated to be able to cool the required space. Businesses
and industry will have rooftop or ground systems that are much larger to
condition the greater amount of space.

Maintenance of air conditioning should be done annually to maintain
efficiency. Units should also be inspected for leaks, to prevent equipment
damage. Coils must be cleaned to retain their efficiencies as dust and
debris will end up in the condensing coil. If air filters are not properly
maintained in the conditioned space or air handler for the evaporator coil,
the coil can become dirty which reduces efficiency and interferes with heat
transfer. Maintenance should be done professionally for best results.

Keeping your air conditioning temperature setting within three degrees is
best. If you move the settings up and down, the unit runs harder and that
creates more wear and tear on equipment. Running at a constant temperature
is easier to maintain than starting from scratch every morning to cool the
rooms. Air conditioning serves the purpose of comfort, reduction of
humidity, and helps preserve materials that might be affected by heat or
humidity. Air conditioning is a modern convenience.