This depends on the age of your air conditioning unit. The problems with a leakage are wearing out of joint or the material used for the fabrication of the system. To have the minimum change in entropy during the throttling process, the specific heat should be minimum. In hermetic arrangements, the motor windings are cooled by refrigerants vapor on its way to the suction valve of the compressor. The ideal refrigerant should: A) have a low latent heat capacity. Ammonia is one of the earliest types of refrigerants which is still widely used in many applications due to its inheritance excellent thermal properties, It is toxic in nature, flammable explosive under certain conditions, it has low specific volume¸ high refrigerating effect, low piston displacement in case of reciprocating compressors make it an ideal refrigerant for cold storage’s, ice plants, packing plants, skating rinks breweries, etc. Chemical Properties. Due to low operating pressure and high displacement, it is used in systems employing centrifugal compressors. The refrigerant in any refrigerator or air conditioner flows continuously through the vapor compression cycle, absorbing the heat in the evaporator and releasing it in the condenser. The ideal refrigerant should be: a. Nonpoisonous, non-stable, nonflammable, non-corrosive. The cryogenic refrigerants have a shallow boiling point at atmospheric pressure. Visit our about section to know more. In case this is not possible, the refrigerant must have a characteristic odor or contain a tracer element so that its leakage can quickly be observed. Leakage can be identified quickly if the refrigerant has a distinct color or odor. If your unit is older, it likely uses R-22. If it is brought into contact with open flame or heater elements, it decomposes into highly toxic constituents. You can also freeze gel packs ($2, Target) to have ready to go for cooling food when the power is out. If the insulation looks worn, your air conditioner is not working as efficiently as it can be. Eating healthy doesn’t have to be complicated. List the good properties of a refrigerant. A haloalkane refrigerant with thermodynamic properties, Norflurane is more commonly referred to as R-134A. The price of the refrigerants is generally high when compared to other chemicals in the industry. The specific heat of liquid should be as small as possible and of vapour should be as high as possible to give less superheating of vapour. D. Low latent heat. When we say “refrigerant” we mean a fluid that can easily boil from a liquid into a vapour and also be condensed from a vapour back into a liquid. B) have a high boiling point. This site uses Akismet to reduce spam. You'll get subjects, question papers, their solution, syllabus - All in one app. - It must have low specific heat and high latent heat. This refrigerant is extremely expensive and is currently being phased out for R-401A, a more environmentally friendly refrigerant. © Copyright 2020 ME Mechanical. The refrigerant must not be flammable or explosive. But because of wear and tear, your AC can lose refrigerant due to leaks. These physical properties of refrigerants help us select the proper refrigerant for the application as per our requirement. This is able to evaporate and condense and is easy and safe to use. To ensure the maximum heat absorption during refrigeration, a refrigerant … In fact, all brands that use Refrigerant in their products have pledged to use eco-friendlier Refrigerants like R410a and R32. It’s in a closed system and simply circulates around your air conditioner over and over again. Thermal conductivity of the refrigerant should be high for faster heat transfer during condensation and evaporation. 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