Refrigerant r22 properties properties of refrigerant r22 dichlorodifluoromethane saturated liquid and saturated vapor imperial and metric units. Hcfcs, particularly r22, have already been phased out in the eu and the phaseout is close to being finalized in the us and other developed countries. Thermophysical properties of refrigerants t his chapter presents data for thermodynamic and transport properties of refrigerants, arra nged for the occasional user. Tx and specific heat capacity c measurements and an equation of state article pdf available in the journal of chemical thermodynamics. Transport properties were not involved in the simulations. Freon, trademark, any of several simple fluorinated aliphatic organic compounds that are used in commerce and industry. 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. Desirable properties and commonly used refrigerants. Properties listed in the following thermodynamic tables in. The blended refrigerant r4a is a longterm, it is an hfc alternative with similar properties to r12. Predicting the properties of mixtures of r22 and r12 part. This technical paper gives an overview on the composition and properties of the existing refrigerants, including r22 substitutes. Thermodyamic properties of r22 at saturation english units p. The study was conducted using a semitheoretical model, cycle11, with a pure crossflow representation of heat transfer in the evaporator and.
The general conclusion of the thesis is that the refrigerant affects all of the measured properties negatively on the subject of lubrication and life of the rolling element bearing. However, it has an operating pressure almost double that of r22, and therefore requires a redesign of the whole system with larger compressors, expansion valves, etc. Technical information at22 thermodynamic properties of dupontz freon. Thermodynamic properties of r4a tetraflouroethane cf3ch2f. Simulations were conducted for dropin performance, for performance in a modified system to assess. Viscosity of refrigerants and other working fluids from residual entropy scaling. As a result, many engineers chose to continue to use the old data. R32 is suitable for new equipment specifically designed for r32, in applications that used to use r410a. Agas au11734 r22 is a single component hcfc refrigerant that has historically been used for air conditioning, medium temperature and low temperature refrigeration. This information is based on values calculated using the nist refprop database mclinden, m. Physical properties general physical properties for freon 407c and freon 407a are shown in table 3. In 16th international refrigeration and air conditioning conference at.
R4a has relatively low pressure and therefore about 50% larger compressor displacement is required when compared to r22. Properties of refrigerant r22 saturated liquid and saturated vapor both imperial and metric units. 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. These physical properties of refrigerants help us select the proper refrigerant for the application as per our requirement. The pressureenthalpy diagrams for freon 407c are shown in figures 1 and 2.
Carbon dioxide is widely used as a refrigerant in mechanical systems refrigerant, marine services, hospitals, etc. State equation, equation of saturated vapor pressure, equation of liquid volume, equation of specific heat capacity, enthalpy and entropy for r11, r12, r, r14, r22. Predicting the properties of mixtures of r22 and r12 part i thermodynamic properties satish kandlikar c. The epas updated refrigerant management requirements what supermarkets and property and facility managers need to know what are the section 608 regulations. Evacuate enclosed spaces and disperse gas with floorlevel forcedair ventilation. Before the clock runs out, turn to petro home services for r22 replacement services and answers to all your questions about air conditioning systems. New tables of the thermodynamic properties of dupont. Comparison of environmental impacts and physical properties of refrigerants ko matsunaga executive summary even before the invention of refrigeration, people wanted to improve their life by using ice to provide cold drinks and preserve food. Refrigerants environmental properties physical and environmental properties of some common refrigerants. Thermodynamic properties of refrigerants r11, r12, r. R22 is the short name for the halocarbon compound chclf2 monochlorodifluoromethane, which is used as the refrigerant.
In the last two centuries, human ingenuity made it. Table 1, on pages 4 and 5, shows the properties of r22 at satur ation. Freon refrigerant for more information on freon refrigerants, visit the information set forth herein is furnished free of charge and based on technical data that chemours believes to be reliable. 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. In addition to fluorine and carbon, freons often contain hydrogen, chlorine, or bromine. The use of these substances is no longer allowed in industrialised countries, but the use of r22 has been extended through tran sitional periods. It has low chlorine content and ozone depletion potential and a modest global warming potential. About r22 refrigerant replacement petro home services. Additional physical property data may be found in other chemours publications. The publication presents a set of equations and constants for calculating thermodynamic properties of refrigerants.
Properties of refrigerant r22 dichlorodifluoromethane saturated liquid and saturated vapor imperial and metric units. In table 1, the climate affecting properties of r 22, r502 and some replacement for to their replacement are reported. When using r32, however, applicable regulations and standards must be. Ammonia, r12, r22, carbon dioxide come under this class of refrigerants. Refrigerants are widely used in refrigeration cycle where cooling effect below the atmospheric temperatures are needed. Refrigerant r22 is hydroclhorofluorohydrocarbon hcfc. Blend of r22 and r115 r502 airconditioning systems ranging from 200 to 2000 tons in capacity. Properties listed in the following thermodynamic tables in ip units can be. R22 can be used in small heat pump systems, but new systems can not be manufactured for use in the eu after 2003. From 2010 only recycled or saved stocks of r22 can be used. New viscosity data of r404a, r407c, r410a, and r507a are presented.
On the other hand, the medium which does not go through the cyclic. The chemical name of refrigerant r12 is dichlorodifluoromethane and its chemical formula is ccl2f2. Second stage of tests in addition, was carried out a second stage of experimental tests, 12 tests at steady state. Column 2 lists the absolute pressures psia and column 3 lists the gauge pressures psig of the sat urated refrigerant at the corresponding fahrenheit temperature. Spreadsheet calculations of thermodynamic properties larry caretto, david mcdaniel, tom mincer csu, northridgeus air force academycsu, northridge abstract a thermodynamic property calculation tool has been developed based on the excel spreadsheet program. Its glide and heat transfer properties generally penalize the system performance, although counterflow heat exchange can deliver. Freon22 saturation properties temperature table temp pressure temp c kpa c liquid vapour liquid vapour liquid latent vapour liquid vapour vf vg df dg hf h fg hg sf sg100 2. Read more about the r22 phase out in different regions in the danfoss whitepaper. For all these refrigerants, the viscosity was measured for the saturated liquid and vapor and also for the superheated vapor. Next diagram represents the pressureenthalpy r22 properties, using refprop 9. Properties of common liquids, solids, and foods a liquids boiling data at 1 atm freezing data liquid properties normal latent heat of latent heat specific boiling vaporization freezing of fusion temperature, density heat substance point, c h.
Rochester institute of technology rit scholar works articles 1975 predicting the properties of mixtures of r22 and r12 part i thermodynamic properties. Correlations for some saturated thermodynamic and transport properties of refrigerant r 22 article pdf available in ashrae transactions january 1993 with 462 reads how we measure reads. Didion abstract the report presents the performance evaluation of nine r22 alternatives and three r502 alternatives. Fellow ashrae mcquay international staunton, virginia usa 1 what is a refrigerant.
Whenever we choose them for particular use properties of refrigerants also plays a vital role in economic and environmental friendly application. Download a pdf copy of the pressure enthalpy chart for both metric and imperial units. I dont think that too many people have a lot of experience with it. Thermodynamic properties of duponttm freonr 12 r12. It has properties close to those of r22, and for this reason, has been extensively used in europe. Refrigerants of thermodynamics property the r22 refrigerant which is used as an alternative to cfcincluded refrigerants, has got a low odp value and thus, its use is permitted until the year 2030.
R32 as a single component refrigerant is attracting attention not only as an alternative to r410a in developed countries but also as an alternative to hcfc22 in developing countries. Pdf thermodynamic properties of dupont freon 22 r22. Spreadsheet calculations of thermodynamic properties. It has one hydrogen atom in its compound and not all the. This articles describes the properties, advantages, and disadvantages of refrigerant r12. This tool can be used to determine individual state points by a graphical. All trademarks and s on this website are property of their respective owners. In addition, we define two dimensionless distances from the critical point tt. R410a has very attractive thermodynamic properties, higher energy efficiency than r22, no glide and hence no problem with the mixture remaining after charge loss and refill. Refrigerant options now and in the future white paper. R22 is a single component hcfc refrigerant that has historically been used for air conditioning, medium temperature and low temperature refrigeration. R22 refrigerant is also called as freon 22 or simply r 22 freon. Usually, a fluid, used in a heat pump and refrigeration cycle that can extract heat from another body or substance. Instead, they changed the datum conditions at which enthalpy and entropy were zero.
Refrigerants temperature and pressure charts temperature and pressure chart for refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a. Section 608 of the clean air act prohibits the knowing release of refrigerant during the maintenance, service. May 28, 2018 these refrigerants are primarily used for air conditioning and heat pumps and have replaced r22 in many applications. R22 will soon be phased out, so you will not see it as much as you do other refrigerants in the future. It is odorless, nontoxic, nonflammable, nonexplosive and noncorrosive. Refrigerants and their application presented by thomas e. In 16th international refrigeration and air conditioning conference at purdue, july 1114, 2016. We have epacertified technicians on hand to discuss your needs and options, including r22 refrigerant draining. Pdf viscosity of mixed refrigerants, r404a, r407c, r410a. As an example, let us consider the refrigerant having r22 as its three digit nomenclature. This article describes thermodynamic properties of the refrigerants the ideal refrigerant. However, all other refrigerant tables work essentially the same way as the r22 example.
R22 refrigerant is one of the most commonly used refrigerants. Fire and explosive properties compromised heart function. Experimental evaluation of refrigerants r290, r32 and r410a in a refrigeration system originally designed for r22 antunes a. Thermodynamic properties of duponttm freonr 22 refrigerant. Price history and availability edit epas analysis indicated the amount of existing inventory was between 22,700t and 45,400t. The epas updated refrigerant management requirements. It is used where low freezing point and noncorrosive properties are important. It has long been used in a variety of airconditioning and refrigeration applications in a variety of markets. Table a1e molar mass, gas constant, and criticalpoint properties table a2e idealgas specific heats of various common gases table a3e properties of common liquids, solids, and foods table a4e saturated watertemperature table table a5e saturated waterpressure table table a6e superheated water table a7e compressed liquid water table a8e saturated icewater vapor. R22 properties pdf tables of the thermodynamic properties of dupont freon.
R22 thermodynamic properties temperature standard1. The information contained herein is based on technical data and tests which we believe to be reliable and is intended for use by persons having technical skill. Theoretical evaluation of r22 and r502 alternatives piotr a. R22 is a single hydrochlorofluorocarbon hcfc compound. Thus, freons are types of chlorofluorocarbons cfcs, hydrochlorofluorocarbons hcfcs. A comparison between refrigerants used in air conditioning. The refrigerants have a thermodynamic property chart on pressureenthalpy coordinates with an abbreviated set of tabular data for saturated liquid and vapor on the faci ng page. R22 pressure enthalpy chart the engineering mindset. Worldwide r22 countdown pdf r22 phase out legislation. Properties of commonly used refrigerants a refrigerant is a substance or mixture. Saturated refers to the con dition of a liquid at its boiling temperature, and of a vapor at its condensing temperature.
However, the european union also commited to an early phaseout for r22, which was enforced. Ingestion is unlikely because of the physical properties and is not expected to be hazardous. What is r22 refrigerant, refrigerant r22 or freon 22 r 22. Predicting the properties of mixtures of r22 and r12 part i. R410a properties pdf new tables of the thermodynamic properties of dupont. Accurate thermophysical properties are available for several fluids. Properties and efficiencies of r410a, r421a, r422b, and. Theoretical evaluation of r22 and r502 alternatives. Pdf correlations for some saturated thermodynamic and. Jun 02, 2019 properties of commonly used refrigerants a refrigerant is a substance or mixture.
Appendix a thermodynamic property tables saturation properties of ammonia ip units saturation properties of ammonia using software refprop nist where the equations and constants for ammonia originate from swatzenberg and baehr 1993, eine neue fundamentalgleichung fure ammoniak, dvktagungsbericht, vol. F 2 since there is only one carbon atom in the compound, this compound has. Properties of refrigerant r22 dichlorodifluoromethane saturated liquid and saturated vapor imperial and metric units sponsored links r22 is a single hydrochlorofluorocarbon hcfc compound. R290 as a substitute of r502 and r22 in commercial. Table a16 properties of the atmosphere at high altitude table a17 idealgas properties of air table a18 idealgas properties of nitrogen, n 2 table a19 idealgas properties of oxygen, o 2 table a20 idealgas properties of carbon dioxide, co 2 table a21 idealgas properties of carbon monoxide, co table a22 idealgas. Thermodynamic and transport propertiesrefprop, version 9. Mixed refrigerants r407c, r410a, r404a, and r507a have gained more and more importance in the last few years as a replacement for r22 and r502. Theoretical evaluation of r22 and r502 alternatives ahri.
Appendix a thermodynamic property tables a2 ammonia data book may 2008 when the haar and gallagher data 1978 was released, ashrae chose not to simply update the old tables. As a result, a refrigerant that has similar thermodynamic properties could be an alternative to r22. Comparison of environmental impacts and physical properties of refrigerants ko matsunaga executive summary even before the invention of refrigeration, people wanted to improve their life by using ice to provide. Refrigerant r12 or freon 12 is said to be the most widely used of all the refrigerants being used for different applications. The data of the site are in good agreement with the national bureau of standards nist, which contains more than 2000 kinds of substances. Thermodynamic properties of dupont freon 22 r22 refrigerant. I do know that hydrocarbons are often added to ultra low temp systems to aid in oil return so, it logically follows that piping design with respect to oil return would not be as critical, however, i have no actual proof of that. Thermodynamic properties of dupont freon 22 r 22 refrigerant. Developing countries began phasing out hcfcs in 2015 and will continue until 2030. Do not induce vomiting unless instructed to do so by.
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