How Often Should Car Refrigerant Be Replenished?
1 Answers
Refrigerant, also known as coolant or freon, typically needs to be replenished every 5-8 years when the car's air conditioning system is functioning normally. Refrigerant, also referred to as coolant, refrigerant, or freon, is a medium substance used in various heat engines to facilitate energy conversion. These substances usually increase power through reversible phase changes (such as gas-liquid phase transitions). Examples include steam in steam engines and refrigerant in refrigeration systems. In refrigeration systems, refrigerant controls the thermodynamic cycle. It absorbs heat from the cooled object at low temperatures and then transfers it to cooling water or air at higher temperatures. In vapor-compression refrigeration systems, refrigerants are working fluids that can liquefy at normal or lower temperatures, such as Freon (fluorine, chlorine, and bromine derivatives of saturated hydrocarbons), azeotropic mixtures (azeotropic solutions formed by mixing two types of Freon in a certain ratio), hydrocarbons (propane, ethylene, etc.), and ammonia. The main technical indicators of refrigerants include saturated vapor pressure, specific heat, viscosity, thermal conductivity, surface tension, etc. Since the 1960s, extensive experimental research has been conducted on the application of non-azeotropic mixtures, which have been used in natural gas liquefaction and separation, among other areas.
