Forane410a nonozone depleting refrigerant, nearazeotropic blend. Recovery equipment including refrigerant recovery containers must be specifically designed to handle r 410a. If possible, the refrigerant must be odorless, but easy detection in the air is desirable. Desirable properties of refrigerants chemical engineering site. Technical r 410a data sheet features and uses of r 410a r410a is an almost azeotropic mixture composed of r125 and r32, it is currently used primarily in new air conditioners that are appearing on the market. Properties and efficiencies of r410a, r421a, r422b, and r. This blend has a higher capacity at lower temperatures and matches r12 at 20f. Physical properties suva 407c refrigerant performs similarly to hcfc22 under evaporator temperatures ranging from 7 to 10c 20 to 50f. The purpose of this standard is to establish purity specifications, to verify composition, and to specify the associated methods of testing for acceptability of the refrigerants listed in section 2. Recently a new refrigerant, r410a, has been formulated and currently is being used in the hvacr industry. The value of ael allowance exposure limit is ppm 8 hour twa. The toxicity depends upon the concentration and exposure. With r410a, the same unit will operate under the same conditions with a suction pressure of. When oxygen levels in air are reduced to 1214% by displacement, symptoms of asphyxiation, loss of coordination, increased pulse rate and deeper respiration will occur.
Pdf refrigerant r4a properties aman kumar academia. It was invented in 1991 but did not begin to see real popularity until the 2000s. Most contractors and technicians worked with r22 systems for home and commercial air conditioning. Reference states used for most refr igerants correspo nd to the inter. Higher heat transfer coefficient requires smaller area and lower pressure drop. Thermodynamic properties of duponttm suvar 410a refrigerant. Whenever we choose them for particular use properties of refrigerants also plays a vital role in economic and environmental friendly application. Thermodynamic properties of duponttm freonr 22 refrigerant. Refrigerant choices this table compares various properties of both current and nextgeneration refrigerants. In preparation for this phaseout, chemours offers freon 407c and freon 410a, environmentally acceptable alternatives to r22. Note that in most cases, equipment designed for r22 cannot use r410a because of this difference in operating pressures, so retrofitting an existing r22.
Desirable properties and commonly used refrigerants. 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. Oct 11, 2017 r410a is an hfc refrigerant that is a blend of the hfc r32 and the hfc r125. Properties and efficiencies of r 410a, r421a, r422b, and r422d compared to r22 prepared by james m. It exhibits performance characteristics similar to r22.
Reduce refrigerant leak to 10% per year, refrigerant gwp by 50%, and reduce charge by 65% 40% indirect warming impact energy consumption. Freon 410a thermodynamic properties freon refrigerants. Developed for air conditioning as well as some medium temperature refrigeration applications. It exhibits higher pressures and refrigeration capacity than r22. Freon 407c and freon 410a refrigerant descriptions freon 407c is a nonozone depleting blend of three hydrofluorocarbon hfc refrigerants.
Composition information on ingredients ingredient name cas number weight % difluoromethane 75105 50 pentafluoroethane 354336 50 common name and synonyms r410a. Toxicity is the important properties of refrigerants. Recovery equipment including refrigerant recovery containers must be specifically designed to handle r410a. All air conditioners use an oil to keep the compressor lubricated. Jun 02, 2019 a refrigerant is a substance or mixture. With r410a, the same unit will operate under the same conditions with a suction pressure of 118 psi and a discharge pressure of 400 psi, as shown in figure 1 on the next page. R410a, or puron, is one of the most popular refrigerants in todays modern world. The refrigerants should be non poisonous to humans and food stuff. Properties and efficiencies of r410a, r421a, r422b, and. Unprotected personnel should not return until air has been. Usually, a fluid, used in a heat pump and refrigeration cycle that can extract heat from another body or substance. All of the r407series refrigerants are based on blends of the three hfc refrigerants r32, r125 and r4a.
R410a has very low toxicity even after repeated exposure. R 410a also functions at a higher pressure than r22, so new compressors are built to withstand greater stresses, reducing the chance for cracking. R410a puron refrigerant pressure temperature chart. Identification of the substancemixture and of the companyundertaking 1. Product name forane r 410a r410a, hfchfc410a, forane fx 41 product synonyms chemical family hydrofluorocarbon blend chemical formula ch2f2chf2cf3 pentafluoroethane difluoromethane epa reg num product use refrigerant chemical name 50 50 y y pentafluoroethane hfc125 difluoromethane hfc32 354336 75105. This makes the equipments compact and reduced the operating cost. Genetron az20 r410a version 2 revision date 11142007 print date 11142007 page 4 10 after release, disperses into the air.
Refrigerants r407c and r410a properties, uses, storage. Manifold sets should be 800 psig high side and 250 psig low side with 550 psig low side restart. Apr 12, 2020 refrigerants are widely used in refrigeration cycle where cooling effect below the atmospheric temperatures are needed. Table a1 molar mass, gas constant, and criticalpoint properties table a2 idealgas specific heats of various common gases table a3 properties of common liquids, solids, and foods table a4 saturated watertemperature table table a5 saturated waterpressure table table a6 superheated water table a7 compressed liquid water table a8 saturated icewater vapor. However, if you rewind just fifteen or twenty years you would find that very little people even knew about it. If you were to put r410a refrigerant into a system designed for r22, the pressure would be too much and the unit would break. Duponttm refrigerants, technical information keywords. Recovery methods once acquiring the proper equipment, it is time to get started with the recovery process. Vapours are heavier than air and can cause suffocation by reducing oxygen available for breathing. All hoses must have a 700 psig service pressure rating. A familiarity with these diagrams will make this chapter easier. Data aire engineering news r410a and r707c page 1 of 2 r410a or r407c know the facts we are all aware that r22 refrigerant was phased out due to the montreal protocol which took affect in january 2010 and alternative refrigerants are. It also provides a closer match to r500 at airconditioning temperatures.
Fellow ashrae mcquay international staunton, virginia usa 1 what is a refrigerant. Equations have been developed, based on the martinhou equation of state, which represent the data with accuracy. New tables of the thermodynamic properties of freon 410a refrigerant ashrae designation. The phaseout schedule for r22, as mandated bythe environmental protection agency epa, will be dis. An understanding of the pressuretemperature relationship of refrigerants as theypass through the refrigeration compression cycle also will help you as you study this chapter on refrigerant tables. Product name forane r 410a r 410a, hfchfc 410a, forane fx 41 product synonyms chemical family hydrofluorocarbon blend chemical formula ch2f2chf2cf3 pentafluoroethane difluoromethane epa reg num product use refrigerant chemical name 50 50 y y pentafluoroethane hfc125 difluoromethane hfc32 354336 75105. R 410a, sold under the trademarked names az20, ecofluor r410, forane 410a, freon 410a, genetron r410a, puron, and suva 410a, is a zeotropic but nearazeotropic mixture of difluoromethane ch 2 f 2, called r32 and pentafluoroethane chf 2 cf 3, called r125 that is used as a refrigerant in air conditioning applications. Although refrigerant properties are different, the basic recovery process is the same for r410a and r22. R410a safety data sheet national refrigerants, inc. 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. New tables of the thermodynamic properties of dupont.
Ingestion is unlikely because of the physical properties and is not expected to be hazardous. R410a 5050, have been developed and are presented here. To enable the use of smaller compressors and other equipment the refrigerant should have smaller vapor density. Main properties composition r125 50% r32 50% type hfc nearazeotropic blend ashrae safety classification a1 nontoxic and nonflammable gwp 2088 recommended lubricant poe. While i say this, the actual glide temperature difference for 410a is rather minimal at properties of a refrigerant, generally in terms of enthalpy and entropy.
This blend refrigerant is similar to r401a except, it is higher in r22 content. These tables are based on extensive experimental measurements. This is because the two refrigerants have different state change points. Data aire engineering news r410a and r707c page 1 of 2 r410a or r407c know the facts we are all aware that r22 refrigerant was phased out due to the montreal protocol which took affect in january 2010 and alternative refrigerants are now available. Leak detectors should be designed to detect hfc refrigerant. Properties and efficiencies of r410a, r421a, r422b, and r422d compared to r22 prepared by james m. As you study their characteristics, known problems, limitations, etc. Thermodynamic properties of duponttm freonr 22 refrigerant author.
The ozone depletion is a global problem like global warming. R410a is an hfc refrigerant that is a blend of the hfc r32 and the hfc r125. R410a also functions at a higher pressure than r22, so new compressors are built to withstand greater stresses, reducing the chance for cracking. R410a is an azeotropic mixture of hfc32 and hfc125. It is designed for use in new equipment and as a service refrigerant for existing hcfc22 air conditioning, heat pump and mediumtemperature refrigeration equipment. Refrigerants and their application presented by thomas e. Engineering consultant summary this report addresses selected properties for four refrigerant blends marketed as alternatives for r22 for use in airconditioning and in medium and hightemperature residential, commercial.
As this product is a gas, refer to the inhalation section. If you were to put r 410a refrigerant into a system designed for r22, the pressure would be too much and the unit would break. However, all other refrigerant tables work essentially the same way as the r22 example. Freon 410a is a nonozone depleting blend of two hfc refrigerants. This refrigerant was designed to be a safe, nontoxic, nonflammable, and reliable alternative to the hcfc r22. Here are some of the desirable properties of refrigerant explained in detail. Genetron properties suite provides results in tabulated form exportable to excel and in diagrams you are used to pressureenthalpy, temperatureentropy. These physical properties of refrigerants help us select the proper refrigerant for the application as per our requirement. This article describes thermodynamic properties of the refrigerants the ideal refrigerant. R410a exhibits higher pressures than r22 so is used in.
This refrigerant was introduced commercially in the early 1960s for low temperature applications and is particularly suitable for hermetic compressors. Today r410a which has had to pass strict safety guidelines that r12 and r22 did not have to pass is becoming more popular, both because it is an hfc hydrofluorocarbon, and because its greater efficiency allows for the design and use of smaller air conditioning equipment. Its gwp of 675 is within the acceptable limits for refrigerant gases used in new equipment splits with a load less than 3 kg, put on the market from 01012025, in compliance with european regulation ec no. Refrigerants subject to the fgas regulation 5172014.
However, r22 will be phased out in the first quarter of the 21st century. Handle in accordance with good industrial hygiene and safety practice, based on the results of the workplace exposure assessment. Always recover refrigerants into an agas reclaim cylinder. R32 is suitable for new equipment specifically designed for r32, in applications that used to use r410a. It is a chemically stable product with low temperature glide and low toxicity. Technical r410a data sheet features and uses of r410a r410a is an almost azeotropic mixture composed of r125 and r32, it is currently used primarily in new air conditioners that are appearing on the market. But, with r 410a since it is a blended refrigerant of r32 and r125 there will be a glide during refrigerant state changes.
1096 327 1136 455 1292 498 707 44 1098 866 1494 335 1255 1159 483 1489 1233 220 1151 1138 1062 436 475 248 553 1120 656 135 956 8 1090 421 93 250 666 691 661