R407c refrigerant properties pdf

According to the montreal protocol, the odp of refrigerants should be. This section presents data for the thermodynamic and transport properties of refrigerants, arranged for the occasional users. 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. R407c is a mixture of hydrofluorocarbons used as a refrigerant. Prolonged exposure to an oxygendeficient atmosphere may be fatal. Refrigerant temperature glide is the temperature difference between the starting and ending.

Pdf experimental evaluation of r410a, r407c and r4a. It is advisable that the system operating conditions be recorded with the r22 still in the system. R407c 232552, a near azeotropic blend of hfc32hfc125 hfc4a, have been developed and are presented here. The production and use of cfcs is restricted by the montreal protocols. This can normally be managed by a minor adjustment to the expansion device. Properties and efficiencies of r410a, r421a, r422b, and. All refrigerants use r11 as a datum reference where r11 has an odp of 1. The vapors are heavier than air and can cause asphyxiation. Use of a refrigerant in an appliance that was designed for and originally. R407c safety data sheet national refrigerants, inc.

R407c thermodynamic properties temperature standard1. B figure 2 page 2 shows the comparison of some properties of r407c and r22. Nist standard reference database 23, refprop thermo dynamic properties of refrigerants and refrigerant mixtures, version 3. The primary disadvantage of r407c is the large temperature glide due to the blend of the specific refrigerants. New refrigerants to replace cfcs comprise an active area of development. This will provide the base data for comparison when the system is put back into operation with the r407c. When oxygen levels in air are reduced to 12 14% by displacement, symptoms of asphyxiation, loss of coordination, increased pulse rate and deeper respiration will occur. As per montreal protocol, r22 is going to be phase out due to its unfavourable impacts related to environment e. Due to a higher efficiency than r404a, a 50% lower gwp and its uage possibility as a dropin solution regarding the retooling of a r22 plant, r407f is an interesting refrigerant for commercial refrigeration.

R4a has relatively low pressure and therefore about 50% larger compressor displacement is required when compared to r22. Computational comparison of r22 and r407c air conditioners with rotary vane compressors. Duponttm refrigerants, technical information keywords. Handbook of green building design and construction second edition, 2017. Refrigerants r407c and r407a properties, uses, storage. No chlorine content, no ozone depletion potential, odp 0. Technical r407c data sheet features and uses of r407c r407c is a ternary mixture nonazeotropic composed of r32, r125 and r4a. It is essential that systems be charged with liquid from the cylinder. It is shipped as a liquid under its own vapor pressure. Lower capacity in low temperature refrigeration systems. Thermodynamic properties of duponttm freonr 22 refrigerant. The refrigerants have a thermodynamic property charge. This paper summarizes the impact of thermophysical properties on refrigerant.

Reduce refrigerant leak to 10% per year, refrigerant gwp by 50%, and reduce charge by 65% 40% indirect warming impact energy consumption. Thermodynamic properties of duponttm freonr 22 refrigerant author. Freon 407c and freon 407a refrigerant descriptions. Refrigerant development and legal situation stratospheric ozone depletion as well as atmospheric greenhouse effect due to. A refrigerant is a substance, usually a fluid chemical compounds, that is used in a refrigeration cycle to cool a space. R407c as substitute for r22 r410a as substitute for r22 r417a, r417b, r422d, r438a and r427a as substitutes for r22. Table 1 lists selected thermophysical properties ptb 1427 pdf of r404a and r410a in. Ingestion is unlikely because of the physical properties and is not expected to be. It is also used in medium temperature refrigeration systems. Refrigerant properties a pressuretemperature table of r407c vs. The important environmental and safety properties are. Sulfur dioxide was widely used as refrigerant during the early 20th century. Gea refrigeration technologies has now approve d bock hg and ha compressors for operation with r407f.

It has been formulated to closely match the properties of r22. To enable the use of smaller compressors and other equipment the refrigerant should have smaller vapor density. R32 is suitable for new equipment specifically designed for r32, in applications that used to use r410a. With the quota enforced decrease in r22 use, r407c has been used as an alternative to r22 in new equipment, it. Additional physical property data may be found in other chemours publications. R407c is a zeotropic mixture consisting of 23% r32, 25% r125 and 52% r4a. It is a zeotropic blend of difluoromethane r32, pentafluoroethane r125, and 1,1,1,2tetrafluoroethane r4a. Freon 407c and 407a properties, uses, storage, and handling. Refrigerant saturation properties were taken from tables supplied by dupont fluorochemicals for r407c and r410a dupont 1994 or from the ashrae handbook 1993. The low ozone depletion potential of r22 compared to cfc11 chlorofluorocarbon 11 and cfc12 and its excellent refrigerant properties have helped facilitate the transition away from cfcs. It is chemically stable, has good thermodynamic properties, low environmental. This article describes thermodynamic properties of the refrigerants the ideal refrigerant. R407c r407c is an hfc blend designed to have similar properties to r22 in air conditioning systems. Jun 02, 2019 carbon dioxide is widely used as a refrigerant in mechanical systems refrigerant, marine services, hospitals, etc.

The pressureenthalpy diagrams for freon 407c are shown in figures 1 and 2. Forane r 407c fire and explosive properties of this material may reduce the available oxygen for breathing. Epas final rule phaseout candidates, likely alternatives and dates refer to tables 4, 5 and 6 of. Once the refrigerant has charged, close the refrigerant valve, valve a and b and disconnect all the hoses and secure everything. In the last two centuries, human ingenuity made it possible to control fully. R407c is an hfc blend designed to have similar properties to r22 in air conditioning systems. Reasonable performance match to r22 in medium temperature refrigeration. A throttling valve should be used to control the flow of refrigerant to the suction side to ensure that a liquid. R407c is not flammable at ambient temperatures and atmospheric pressure. Provide sufficient air exchange andor exhaust in work rooms. R290 propane as alternative refrigerant propylene r1270 as an alternative to propane carbon dioxide r744 co 2 as an alternative refrigerant and secondary fluid refrigerants for special applications lubricants for compressors refrigerant properties application ranges overview lubricants to the digital refrigerant report. R407c r407f, r452a xp44 arm35 0 500 1,000 1,500 2,000 pressure or r32hfchfo.

Fellow ashrae mcquay international staunton, virginia usa 1 what is a refrigerant. R407c is a zeotropic hfc refrigerant blend rated a1 by ashrae lowest levels of toxicity and flammability, having zero ozone depletion potential and a global warming potential of 1774. Compacted bead type driers can use xh6 or xh9 molecular sieve material such as found in the emerson climate technologies ek or ekh series. R404a refrigerant is an established alternative to r22 and r502. R407c is predominantly used in commercial and residential air conditioning systems. It is chemically stable, has good thermodynamic properties, low environmental impact and very low toxicity. Refrigerant choices this table compares various properties of both current and nextgeneration refrigerants.

Solid core driers such as emerson climate technologies adk are compatible with either r22 or r407c. Zero ozone depletion potential replacement for r22. In some applications it may be necessary to consider other properties of the refrigerant, such as its interaction with the process fluid in the event of a pinhole leak. The system should be electrically shut off and the refrigerant properly removed from the system. Therefore it must be charged in the liquid phase to prevent fractionation. 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. The low gwp refrigerant r407f for highly efficient and. Residential air conditioning for new equipment and retrofitting. A familiarity with these diagrams will make this chapter easier. New tables of the thermodynamic properties of dupont. These efforts have been in place since the late 1980s.

Refrigerant recharging conventional cylinder not allowed because of different refrigerant properties. The glide associated with r407c approximately 8 to 11 f can be large enough to have an effect on the refrigeration cycle and the charge of the compressor. Close performance match with slightly higher operating pressures. 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. In 2000 international refrigeration conferences at purdue university. The potential for a single molecule of the refrigerant to destroy the ozone layer. Pdf refrigerant types, issues, trends and future options. Characteristics of refrigerants used in the correlation at 1. R407c thermodynamic properties agc chemicals company.

R407c is designed to meet the needs of many new and existing air conditioning and refrigeration systems. These physical properties of refrigerants help us select the proper refrigerant for the application as per our requirement. 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. Physical properties general physical properties for freon 407c and freon 407a are shown in table 3. It is odorless, nontoxic, nonflammable, nonexplosive and noncorrosive.

R407c is predominantly used in commercial and residential air conditioning systems and has very similar properties to r22. R438a like other gases such as r407c is a zeotrope. Refrigerant temperature glide is the temperature difference between the starting and ending temperatures of a refrigerant phase change within a system at any constant pressure. R407c refrigerant middle east leaflet klea 407c r410a refrigerant klea 410a r410a refrigerant is a leading high pressure alternative to r22, comprising r32 and r125, for air conditioning and refrigerant applications for new equipment. Inhalation may cause an increase in the sensitivity of the heart to adrenaline, which could result in irregular or rapid heartbeats. R407c is a nonazeotropic refrigerant blend and this adds influence of glides condensing and boiling isotherms. Properties and efficiencies of r410a, r421a, r422b, and r422d compared to r22 prepared by james m. Viscosity of mixed refrigerants r404a, r407c, r410a, and r507a. Physical properties suva 407c refrigerant performs similarly to hcfc22 under evaporator temperatures ranging from 7 to 10c 20 to 50f. R407c has zero odp and considerably gwp as compared to r22. This is proper air conditioning, refrigeration practice. New tables of the thermodynamic properties of freon 407c refrigerant ashrae designation.

R407cpsltt r407cpsvtt r407c t sl p p r407c t s vp p r407cdsltt r407cdsvtt r407chsltt r407chsvtt r407cssltt r407cssvtt r407ccpsltt r407ccpsvtt r407ccvsltt r407ccvsvtt r407csurftenstt r407cwsltt r407cwsvtt. Freon 407c thermodynamic properties freon refrigerants. Refrigerants and specialities wernervonsiemens str 18 d97076 wuerzburg. R407cpsltt r407cpsvtt r407c t sl p p r407c t s vp p r407cdsltt r407cdsvtt. May 28, 2018 b r4a and r407c refrigerant properties these refrigerants are primarily used for air conditioning and heat pumps and have replaced r22 in many applications. R407c is a ternary mixture nonazeotropic composed of r32, r125 and r4a.

R407c is a zeotropic hfc refrigerant blend rated a1 by. Difluoromethane serves to provide the heat capacity, pentafluoroethane decreases flammability, tetrafluoroethane reduces pressure. Refrigerants and their application presented by thomas e. Although one of its components, r32, is flammable, the overall mixture composition is formulated so that. It has properties similar to those of r22, and for this reason, saw widespread use. Control parameters 1,1,1,2tetrafluoroethane r4a 811972 aiha weel oel 8 hr twa ppm pentafluoroethan r125 354336 aiha weel oel 8 hr twa ppm difluoromethaner32 75105. Vapour charging solstice n40 may result in the wrong refrigerant composition and could damage the system.

R407c is a zeotropic hfc refrigerant blend of r125, r32 and r4a. These tables are based on extensive experimental measurements. Material safety data sheet 9 physical and chemical properties appearanceodor ph na specific gravity 1. Low refrigerant charge is harmful to the environment, if we have not checked or repaired the leak then it may release the refrigerant again into the atmosphere. Commonly used in large commercial refrigerated air conditioning systems. It is designed for use in new equipment and as a service refrigerant for existing hcfc22 air conditioning, heat pump and mediumtemperature refrigeration equipment. Usually, a fluid, used in a heat pump and refrigeration cycle that can extract heat from another body or substance. 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. R407c system is similar to r22 and the components used in a r407c system are the same. Properties and efficiencies of r410a, r421a, r422b, and r. R4a also finds a niche where additional high condensing temperatures are needed and in many of transport applications. Refrigerant properties application ranges overview lubricants to the digital refrigerant report.