What are the main three refrigerant groups?
What are the main three refrigerant groups?
The classification of refrigerants into different groups is due to their chemical composition. The most common refrigerants include Chlorofluorocarbons (CFCs), Hydrochlorofluorocarbons (HCFCs), Hydrofluorocarbons (HFCs), and Natural Refrigerants.
What are the classifications of refrigerants?
There are four main groups of refrigerants and they are determined by their chemical constituents but are generally classified as Chlorofluorocarbons (CFCs), Hydro chlorofluorocarbons (HCFCs), Hydro fluorocarbons (HFCs) and Natural Refrigerants [7]. …
What are CFC and HCFC refrigerants?
CFC Refrigerant: CFC refers to the chemical composition of the refrigerant. Chlorofluorocarbon indicates that the refrigerant is comprised of Chlorine, Fluorine, and Carbon. Common CFC refrigerants are R-11, R-12, R-13, R-113, R-114, and R-115. Common HCFC refrigerants are R-22, R-123, R-124, and R-142b.
What is refrigerant R22?
R22 refrigerant is a chemical that keeps the air coming from your air conditioning system cool, so it’s unquestionably incredibly important. Most air conditioning units older than 10 years utilize an AC refrigerant called R22 that’s commonly identified as Freon*, and is noted by the EPA as HCFC-22.
What is the safest refrigerant?
Ammonia is toxic and flammable, but when used in systems designed with modern technology, it is a safe refrigerant to use. Currently, K-State is one of only a few universities in the United States where facilities are available to study ammonia as a refrigerant.
Is refrigerant liquid or gas?
The refrigerant, a chemical compound that changes easily from liquid to a gas. When the refrigerant is pushed into the compressor, it is a low pressure gas. The compressor pushes the gas molecules together, heating them up as the pressure raises.
What are Group 2 refrigerants?
Class 2 is for refrigerants that, when tested, exhibit flame propagation at 140°F (60°C) and 14.7 psia (101.3 kPa), have a heat of combustion less than 19,000 kJ/kg (8,174 British thermal units BTU/lb), and have a lower flammability limit (LFL) greater than 0.10 kg/m3.
What are primary and secondary refrigerants?
Primary refrigerants are those fluids, which are used directly as working fluids, for example in vapour compression and vapour absorption refrigeration systems. As the name implies, secondary refrigerants are those liquids, which are used for transporting thermal energy from one location to other.
What does HCFC stand for?
HCFC. Hydro-Chloro-Fluoro Carbon.
Is CFC still used today?
The atmospherically benign HFC refrigerants will remain in production, but CFC and HCFC refrigerants will be phased out. Production of CFCs ceased in 1995. HCFC production will cease in 2020 (HCFC-22) or 2030 (HCFC-123).
Can I replace R22 with R410A?
No. You can’t do that. It probably wouldn’t work. Even though you put a compressor in there that’s R410A, the rest of condenser probably isn’t tested and rated for operating at R410A pressures because R410A has to operate at a higher pressure.
Can I replace R22 with R134a?
R134a has a lower thermal conductivity than R22, so an R134a system needs a larger heat exchanger. R22 refrigerant and its HFC replacement R410A are totally incompatible.
What is the cheapest refrigerant?
$50 – $150 Per Pound Installed. Home AC Freon recharge costs $100 to $320 on average, depending on the AC unit size and refrigerant type. R22 Freon prices are $90 to $150 per pound to refill or $13 to $21 per pound wholesale. R410A refrigerant costs $50 to $80 per pound installed or $4 to $8 per pound wholesale.
Which gas is filled in AC?
R22 with a molecular formula of CHCLF2 is the most widely used refrigerant for the Air-conditioners. It constantly changes its state(Solid, Liquid and gas) at different temperature. Caution : Refrigerants are too dangerous at higher temperature as it can catch flame.
What refrigerants are banned?
The hydrocarbon refrigerants propylene R1270 and R443A have been banned for new residential and light commercial air conditioning and heat pumps, cold storage warehouses, centrifugal chillers, and positive displacement chillers.
What is a Class 3 refrigerant?
Moreover, Class 3 is for refrigerants that, when tested, exhibit flame propagation at 140°F (60°C) and 14.7 psia (101.3 kPa) and that either have a heat of combustion of 19,000 kJ/kg (8,174 BTU/lb) or greater or a LFL of 0.10 kg/m3 or lower.
What are secondary refrigerants?
Secondary refrigerants allow the amounts of environmentally harmful primary refrigerants to be minimized and contained in a restricted area. Examples of secondary refrigerants include water, air, hydrocarbons, ammonia and carbon dioxide, which are more environmentally benign than traditional refrigerants such as HCFCs.
What are the commonly used secondary refrigerants?
The commonly used secondary refrigerants are the solutions of water and ethylene glycol, propylene glycol or calcium chloride. These solutions are known under the general name of brines.
Is HCFC harmful?
Man-made compounds such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HCFCs) and halons destroy ozone in the upper atmosphere (stratosphere). Stratospheric ozone loss can result in potential harm to human health and the environment, including: increased incidence of skin cancer and cataracts.
Is refrigerant a liquid or gas?