Automotive AC Upkeep Ideas Despite the fact that air conditioners are solely barely much less frequent than rear-view mirrors, few automobile house owners have any clear thought simply how one works or what to do if it does not. It is an unknown realm the place the usually adventurous novice mechanic fears to tread. There’s some motive for this reluctance. Any air-conditioner drawback that includes opening the pressurized system to the environment ought to most likely be left to the professionals, who’ve the costly instruments and experience wanted. However a complete host of frequent issues fall wanting drastic measures and are simply inside attain of a shade-tree mechanic. And even when you do not qualify for that title, and resolve to depart the work to others, you may be higher off when you perceive the difficulty. How Does Auto Air Conditioning Work?
It is quite simple: An auto air conditioner – in addition to its shut kin, the house air conditioner and the fridge – strikes warmth. Refrigerant picks warmth up contained in the automobile and carries it exterior. Technically termed a vapor-compression cooler, an air conditioner depends on two fundamental bodily rules to seize and launch warmth: When a liquid modifications to a fuel (boils), warmth is absorbed; when the fuel condenses, the identical quantity of warmth is launched. The quantity of warmth wanted to vaporize a pound of water, to make the leap from 211 levels Fahrenheit to 212 levels Fahrenheit, is 970 Btu (British thermal items). In contrast, it takes just one Btu to get from 210 levels Fahrenheit to 211 levels Fahrenheit. It is this modification of part that permits an air conditioner to get a lot work out of a small quantity of refrigerant. The quantity of stress on a liquid or fuel impacts each its temperature and in addition the temperature at which it boils or condenses. As an illustration, when you apply 20 kilos per sq. inch (psi) of stress to 211 levels Fahrenheit water, it can heat to 257 levels Fahrenheit and can nonetheless be on the verge of boiling. As a result of temperature and stress are straight associated, jimmying with one or the opposite as acceptable will enable gases to be modified to liquids (and vice-versa) with comparative ease. An auto air conditioner strikes warmth by permitting a liquid to turn into a fuel contained in the passenger compartment (thus absorbing warmth) after which returning the fuel to liquid type exterior the passenger compartment (the place it provides up warmth). The liquid occurs to be refrigerant-12 (usually referred to as R-12 or Freon, the DuPont trademark). R-12 is used as a result of it occurs to have a secure and handy boiling level (19 levels Fahrenheit at 20 psi). In any other case, it actually does not have magical properties. In truth, R-12 has a few disadvantages in comparison with its mundane relative, water: When uncovered to flame or sizzling steel, it varieties toxic phosgene fuel. Additionally, the household of chlorofluorohydrocarbons is implicated within the destruction of the earth’s protecting layer of stratospheric ozone. [ Supply : https://www.motherearthnews.com/homesteading-and-livestock/auto-air-conditioning-zmaz87jazgoe ]