How is gas cooled down?

Gas can be cooled down through various methods, including expansion, heat exchange, and refrigeration. When gas expands, it does work on its surroundings, which can lower its temperature, a principle known as adiabatic cooling. Additionally, heat exchangers can transfer heat from the gas to a cooler medium, effectively reducing the gas temperature. Refrigeration systems utilize a cycle of compression and expansion of a refrigerant to absorb heat from the gas, thereby cooling it down.