The people I was with and I haven’t talked about cars in a while so it is high time to do so.

The people I was with and I haven’t owned a automobile in years after moving overseas, although I still love to talk about them as they were a large part of my life growing up.

Older cars respectfully use a mechanical system, which operates on basic thermodynamics principles. The idea consists of multiple components including a compressor, condenser, expansion valve, and evaporator. The compressor pumps gas from the evaporator to the condenser, where it releases heat and condenses into a high-pressure, high-temperature liquid. The liquid then flows through the HVAC expansion valve, where it quickly expands and lowers its temperature. This cooled HVAC liquid refrigerant then enters the evaporator, where it absorbs heat from the cabin air and returns to the compressor as a low-pressure gas, starting the cycle anew. The cabin air is cooled and dehumidified as it passes over the evaporator fins, and then blows through the a/c ducts into the passenger compartment. One of the main challenges of mechanical a/c units in older cars is their refrigerant; Until the 1990s, most automotive a/c units used chlorofluorocarbon (CFC) refrigerants, which have been found to have a significant impact on the ozone layer. The Montreal Protocol, an international treaty aimed at protecting the ozone layer, led to the phase-out of CFCs in most applications, including automotive a/c, and many older cars still use CFCs, and owners should be careful when having their a/c units worked on to ensure that the refrigerant is not released into the atmosphere.

heat pump