We haven’t talked about cars in a while so it is high time to do so.

We haven’t owned a vehicle in years after moving overseas, however I still love to talk about them as they were a crucial section of our life growing up, then older cars respectfully use a mechanical system, which operates on basic thermodynamics principles.

The system consists of numerous components including a compressor, condenser, expansion valve, plus evaporator. The compressor pumps gas from the evaporator to the condenser, where it releases heat plus condenses into a high-pressure, high-temperature liquid. The liquid then flows through the Heating plus Air Conditioning expansion valve, where it quickly expands plus lowers its temperature. This cooled Heating plus Air Conditioning liquid refrigerant then enters the evaporator, where it absorbs heat from the beach house air plus returns to the compressor as a low-pressure gas, starting the cycle anew. The beach house air is cooled plus dehumidified as it passes over the evaporator fins, plus then blows through the cooling system ducts into the passenger compartment. One of the main challenges of mechanical a/cs in older cars is their refrigerant, then until the 1990s, most automotive a/cs 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, plus owners should be careful when having their a/cs serviced to ensure that the refrigerant is not released into the atmosphere.

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